EC850 Portable Conductivity/TDS Meter
- Description
- Specs
- Documents
- Parts
- Reviews
- Warranty
The Apera Instruments EC850 Portable Conductivity/TDS Meter Kit is designed for lab-grade conductivity measurement in the field with various intelligent functions and a rugged structure.
Instrument Features
- Ideal for use in harsh environments — IP57 Waterproof rating, silicone socket protector and grip cover protect the instrument from general impact.
- The large LCD displays conductivity/TDS and temperature along with icons of stable readings and finished calibrations.
- The foldable stand allows use as a benchtop meter.
Conductivity Features
- The BPB 2301T-S Conductivity/Temperature Electrode adopts a brush-resistant platinum black coated sensor, which ensures a lab-grade measuring accuracy (±1% F.S ±1 digit) in an ultra-wide range (0 to 200,000 µS/cm / 200 mS/cm).
- Quick and easy 1-3 point conductivity calibration
- Built-in self-diagnosis ensures conductivity calibration will be performed correctly and guides you on how to fix common problems.
- Single-tap switch among conductivity and TDS.
- TDS conversion factor can be set from 0.40 to 1.00.
Technical Specifications
Cond.
Measuring Range
Conductivity：0~200 mS/cm, divided into five ranges, automatically switch measuring range.
(0 to 19.99) μS/cm;
(20.0 to 199.9) μS/cm;
(200 to 1999) μS/cm;
(2.00 to 19.99) mS/cm;
(20.0 to 199.9) mS/cm
TDS: (0 to 100) ppt（g/L)
Resolution
0.01/0.1/1μS/cm 0.01/0.1 mS/cm
Accuracy
±1.0% FS ±1 digit
Temperature Compensation Range
(0 to 50)˚C (Auto. or Manual)
Cell constant
0.1/1/10 cm-1
Temp.
Measuring Range
0 to 100℃
Resolution
0.1℃
Accuracy
±0.5℃±1 digit
Other Specifications
Data Storage
N/A Storage Content
N/A
Power
3* AA alkaline batteries
Dimension & Weight
Meter: (88*170*33)mm / 313g
Case: (360*270*76)mm / 1.6kg
Connector RCA for temperature, 8-pin for conductivity
What's in the box? EC850 meter, 2301T-S conductivity/temp. electrode, 50ml of conductivity standards (1413µS, 12.88mS, 84µS), screwdriver (for battery replacement), instruction manual, carrying case Reviews
Based On 24 reviews.
-
Client 9/29/2021
works better than Orion and not even half the price
It's awsome, works better than Orion and not even half the price.....
-
Ryan Manning 9/29/2021
Great value
The meter is simple to use and set up. I was in a real bind to get an instrument and their response/shipping time was excellent. I have enjoyed using it.
-
Butch 9/26/2021
Finally a meter I can trust!
Instructions are clear, and a quick start laminated sheet as well!!
Calibration is easy and it's been holding fantastic! -
Leah Davis 9/26/2021
Electrode cracked after 3 CAREFUL uses.
Seems to be poor quality electrode. Following instructions for cleaning and the electrode is cracked at the bottom. Now I will have to order more.
-
funbear 9/9/2021
when u need accurate pH readings, this is the product...
you can buy a pH digital tester for $15....
they can get you close...
but when you need ACCURATE, RELIABLE and CONSISTENT readings, this is top of the line pH meter.
For any meter to be accurate, it must be calibrated. This kit comes with several calibration kits for different ranges of ph readings. IMO, this is the ONLY way to properly calibrate. Similar to a temp sensor... why calibrate it at -30F if you are reading temps at 250 deg. Same true here... you must calibrate by using a standard close to the pH you will be testing.
The machine itself is large, robust, built to last. I compared these readings to some of my lower cost pH readers and this meter consistently read about 10-20% different. I have to trust this meter of course, as I had it finely calibrated. I test water pH to maintain specific levels, so knowing the proper ph is critical, so the product is ideal for my applications. For other applications, a lower cost pH meter will suffice, so you consider this when selecting a meter.
Resolution .01, numbers easy to read, good contrast on display. Hard to find a flaw with this unit. Insructions are well written.... -
GearFreak 9/9/2021
Decent pH meter, not as good as the true lab grade brands
This is a fine pH meter, just nowhere near as good as the meters commonly used in professional and academic labs. I am not sure this is worth their asking price. The reason I took off a star was for the high (in my opinon) retail price.
This meter seems relatively precise (repeat readings were within a few hundredths of each other). I am not positive how accurate it is, as I don't have proper NIST traceable solutions to test with. I tested the included calibration solutions, as well as some extech single use calibration packets I had. The Extech solutions were technically expired, so I don't know which solution was more accurate. The readings for the two buffers disagreed by about 0.1 to 0.15. It is still relatively close. I do not have any reference solutions between the standard 3-point calibration values of 4, 7, and 10, so I couldn't test how well the calibration curve on this meter worked.
Apera seems to market this meter as a lab grade meter, for a lower price. I don't know if I agree with that. I would classify this as a slightly more accurate consumer meter, for an increased price. True lab grade meters will have extra features this unit lacks, such as more calibration options (5-point curves, etc.), data logging/export, GMP compliance, etc. All the other lab grade meters I've used (Mettler, VWR, Thermo, etc.) feel much more robust than this meter does.
There are some features that I do like. The included hard case is a nice touch. It fits everything nicely, and although the case isn't as robust as a Pelican case, it will protect the meter from mild abuse. I like that there is extra room inside the case -- I can store the batteries outside of the meter. I prefer to store batteries out of the meter if I am not going to use it for a while, just in case the batteries leak. I put the batteries in a plastic bag so it's easy cleanup if they leak -- the photos do not show this. I also appreciate that Apera put captive screws on the battery cover -- I always hate losing tiny battery compartment screws, and this will prevent that from happening. I do appreciate that Apera shipped the electrode with a proper 4M KCl solution to keep the electrode fresh. While I appreciate the inclusion of reference buffers, the seal on the buffer bottles was very difficult to open, and I would feel more comfortable with the buffers in a Nalgene bottle instead of this style of bottle that has a coated paper type sealing disk -- these tend to leak after a while.
Overall, this meter works well enough, seems to be more accurate than the really cheap meters you can find on Amazon, but doesn't come close to the quality and features of a true lab grade meter. For the retail price here, I think you would be better served buying a lightly used/reconditioned lab grade meter. I am not really sure what market Apera is trying to target with this meter -- most of the people/industries that require very high accuracy and precision will usually have enough funds to get a proper lab meter; the home/recreational/hobbyist market will usually be served just fine by the cheaper pH meters or single-use strips. -
Earth Spirits 9/7/2021
Rugged, Accurate and Complete with Case
I do like this kit from Apera. I have been using one of their Pen Style kits for several years now and consider the brand very good in the measuring and instrumentation fields.
The meter body is very robust and durable. It also is relatively light weight and is water resistant. The 4 buttons are easy to press and operate. The housing has a rubberized shell that doesn't slip in hand. It is easy to hold with one hand and use.
The Auto Temperature Compensating probe is high quality and connects via a black RCA connector for Temp and a blue BNC connector for pH. The third cap to the left of those two is just a blank spot.
The electrode is high quality and features a housing around the glass tip. It is one of their higher end probes.
It is good for use in probe holders and makes an excellent bench top unit. The meter runs off of 3AAA batteries and so isn't made for continuous monitoring.
I like the case as it holds all the essentials and protects everything in a lightweight yet sturdy and convenient to carry form factor.
For field use where a pen style may be too large or less ideal this comes with an almost 3' lead on the electrode.
5 stars for quality at a good value. -
Joshua Davies 9/7/2021
Setup was quick and the measurement was surprisingly accurate
It's made in China, so the instructions are a little bit difficult to decipher, but when you first get the meter, you're supposed to calibrate it using three (provided) pH solutions. The calibration is pretty quick and easy - just press the "cal" button, dip the sensor in the solution, wait for the smiley face icon to appear (seriously), and press the "done" button. Apparently the sensor can work after calibrating with just the 7 pH solution, but the accuracy is increased if you calibrate three times with each of the different 7,4 and 10 pH solutions, which I went ahead and did. (If you press the calibration button again after calibrating with the 7 pH solution it know to expect the 4 pH).
Once it was calibrated, I used it to measure the pH level in my pool and I was a little surprised by how quick and accurate the reading was. I've been making do with the colored test strips that most pool owners use, and I could see that my pH was on the high end of acceptable, so somewhere between 7 and 8, but this meter measured it to exactly 7.8, in several places in the pool.
Definitely recommended for accurate, unambiguous pH measurement: this thing gives me a reading faster than the chemical test strips do! -
Beat a ’Bhèist 9/3/2021
This Is A Good Quality Instrument- However Requires Considerable Calibration
One obtained this to test drinking water. It is a good quality instrument, the directions are clear, but requires quite a bit of continuous calibration.
This is good for professional level water testing.
Due to almost continuous calibration gave 4-Stars. -
JD 9/3/2021
I actually got this to test our pond water and drinking well supply.
Pros:
- Accurate 1-3 point automatic calibration
- Temperature compensation
- Self-diagnostics
- Auto shut-off
- RoHS compliant (Meaning it should have no hazardous materials found in electrical and electronic components)
- IP57 Rating (Meaning it is supposed to withstand submersion in water up to 1 meter)
- ISO 9001:2015 compliant (Basically quality standards)
Cons:
- Does not come with test vials
- This is a Scientific Instrument so its uses are limited to only general water solution pH measurements
This item comes with the following:
- Portable Case
- pH Meter
- Electrode Wand
- 3x Standard Buffer Solutions
- Phillips head Screwdriver
- Flexible Cord to connect Electrode Wand to pH Meter
So first things first, how does a pH meter work. Basically the tester measures the mV (millivolts) from a standard known solution and compares it to a sample solution that you want to test. The tester uses the difference in the mV to deduce the pH. Thats as simple as I can put it.
I fully advise that you read the manual a couple times before use of this item. You should also have a couple other things handy that they kit does not come with. Some testing vials and distilled water. It is helpful to have the vials so you can use the buffer solutions and extend the supply as long as possible. It comes with 3 buffer solutions.
pH 4.00
pH 7.00
pH 10.01
With 3 buffer solutions that gives you two options. To calibrate with 1, 2 or 3 point buffer solutions. Two point calibration will give you accurate readings but 3 point calibration will give you the most accurate readings. I did find that I had to calibrate this unit each time I used it. I prefer calibrating across the 3 points for the best reading. However, you don't get a lot of solution so each time you calibrate the unit. The sample solution you used for the calibration technically should be discarded as it is contaminated. I calibrated the unit a number of times over a few days testing various water supplies. In the process, went through about 1/4 of the buffer supply. I suggest using narrow testing vials that are slightly bigger than the wand so you don't have to use as much buffer solution per calibration. Also, ensure that you rinse the electrode with distilled water and pat dry each time you submerge the electrode in a solution. You should never touch the wand tip (or wand to be safe, just a good practice) with your hands. you should always hold it from the black cord couple. Also you should soak the electrode in distilled water for at least 5 minutes before using it for the first time. Or before each use is a good practice but not required. It's just a good practice.
I found to Ph Meter to be fairly accurate. However, testing this against my $40.00 tester provided relatively the same results within .07. This unit has a pretty hefty price tag and it is geared for the professional. While I think the unit is accurate. I would not say that I would consider this lab quality. Also in my opinion, you will go through the buffer solution fast, so I recommend getting more if you test often. I have not used the Apera buffer solutions before. While the Apera buffer solutions tested accurately enough against the NIST solutions I usually use. I prefer a different supplier. As the Apera buffer supply that comes with the kit has no expiration date so you have no idea how long this has been sitting around or when it is no longer effective to use for calibration. All in all, a decent tester. I will update the review later after more prolonged testing.
NOTE: There was a card included in the kit that advised if you leave a review on Amazon and copy and paste it into and email they supply. They will provide you with the following at no cost.
- pH 4.00 Buffer solution
- pH 7.00 Buffer solution
- pH 10.01 Buffer solution
- 3M KCL storage solution
- Apera CaliPod
- Probe-cleaning Ultra-soft brush
The bottles of buffer solution in the picture for this offer look at least 3 times bigger than the ones you get with the kit. I will follow up on this and see if they actually send it out
This product is made in China
-
We warrant this instrument to be free from defects in material and workmanship and agree to repair or replace free of charge, at the option of APERA INSTRUMENTS, LLC, any malfunctioned or damaged product attributable to the responsibility of APERA INSTRUMENTS, LLC for a period of THREE YEARS for the instrument and SIX MONTHS for the probe from the delivery.
This limited warranty does NOT cover any issues due to:
- Accidental damage
- Improper use
- Normal wear and tear
- Transportation
- Storage
- Failure to follow the product instructions
- Unauthorized maintenance, modifications, combination or use with any products, materials, processes, systems or other matter
- Unauthorized repair
- External causes such as accidents, abuse, or other actions or events beyond our reasonable control.
- Description
- Specs
- Documents
- Parts
- Reviews
- Warranty
The Apera Instruments EC850 Portable Conductivity/TDS Meter Kit is designed for lab-grade conductivity measurement in the field with various intelligent functions and a rugged structure.
Instrument Features
- Ideal for use in harsh environments — IP57 Waterproof rating, silicone socket protector and grip cover protect the instrument from general impact.
- The large LCD displays conductivity/TDS and temperature along with icons of stable readings and finished calibrations.
- The foldable stand allows use as a benchtop meter.
Conductivity Features
- The BPB 2301T-S Conductivity/Temperature Electrode adopts a brush-resistant platinum black coated sensor, which ensures a lab-grade measuring accuracy (±1% F.S ±1 digit) in an ultra-wide range (0 to 200,000 µS/cm / 200 mS/cm).
- Quick and easy 1-3 point conductivity calibration
- Built-in self-diagnosis ensures conductivity calibration will be performed correctly and guides you on how to fix common problems.
- Single-tap switch among conductivity and TDS.
- TDS conversion factor can be set from 0.40 to 1.00.
Technical Specifications
Cond.
Measuring Range
Conductivity：0~200 mS/cm, divided into five ranges, automatically switch measuring range.
(0 to 19.99) μS/cm;
(20.0 to 199.9) μS/cm;
(200 to 1999) μS/cm;
(2.00 to 19.99) mS/cm;
(20.0 to 199.9) mS/cm
TDS: (0 to 100) ppt（g/L)
Resolution
0.01/0.1/1μS/cm 0.01/0.1 mS/cm
Accuracy
±1.0% FS ±1 digit
Temperature Compensation Range
(0 to 50)˚C (Auto. or Manual)
Cell constant
0.1/1/10 cm-1
Temp.
Measuring Range
0 to 100℃
Resolution
0.1℃
Accuracy
±0.5℃±1 digit
Other Specifications
Data Storage
N/A Storage Content
N/A
Power
3* AA alkaline batteries
Dimension & Weight
Meter: (88*170*33)mm / 313g
Case: (360*270*76)mm / 1.6kg
Connector RCA for temperature, 8-pin for conductivity
What's in the box? EC850 meter, 2301T-S conductivity/temp. electrode, 50ml of conductivity standards (1413µS, 12.88mS, 84µS), screwdriver (for battery replacement), instruction manual, carrying case Technical Specifications
Cond.
Measuring Range
Conductivity：0~200 mS/cm, divided into five ranges, automatically switch measuring range.
(0 to 19.99) μS/cm;
(20.0 to 199.9) μS/cm;
(200 to 1999) μS/cm;
(2.00 to 19.99) mS/cm;
(20.0 to 199.9) mS/cm
TDS: (0 to 100) ppt（g/L)
Resolution
0.01/0.1/1μS/cm 0.01/0.1 mS/cm
Accuracy
±1.0% FS ±1 digit
Temperature Compensation Range
(0 to 50)˚C (Auto. or Manual)
Cell constant
0.1/1/10 cm-1
Temp.
Measuring Range
0 to 100℃
Resolution
0.1℃
Accuracy
±0.5℃±1 digit
Other Specifications
Data Storage
N/A Storage Content
N/A
Power
3* AA alkaline batteries
Dimension & Weight
Meter: (88*170*33)mm / 313g
Case: (360*270*76)mm / 1.6kg
Connector RCA for temperature, 8-pin for conductivity
What's in the box? EC850 meter, 2301T-S conductivity/temp. electrode, 50ml of conductivity standards (1413µS, 12.88mS, 84µS), screwdriver (for battery replacement), instruction manual, carrying case Technical Specifications
Cond.
Measuring Range
Conductivity：0~200 mS/cm, divided into five ranges, automatically switch measuring range.
(0 to 19.99) μS/cm;
(20.0 to 199.9) μS/cm;
(200 to 1999) μS/cm;
(2.00 to 19.99) mS/cm;
(20.0 to 199.9) mS/cm
TDS: (0 to 100) ppt（g/L)
Resolution
0.01/0.1/1μS/cm 0.01/0.1 mS/cm
Accuracy
±1.0% FS ±1 digit
Temperature Compensation Range
(0 to 50)˚C (Auto. or Manual)
Cell constant
0.1/1/10 cm-1
Temp.
Measuring Range
0 to 100℃
Resolution
0.1℃
Accuracy
±0.5℃±1 digit
Other Specifications
Data Storage
N/A Storage Content
N/A
Power
3* AA alkaline batteries
Dimension & Weight
Meter: (88*170*33)mm / 313g
Case: (360*270*76)mm / 1.6kg
Connector RCA for temperature, 8-pin for conductivity
What's in the box? EC850 meter, 2301T-S conductivity/temp. electrode, 50ml of conductivity standards (1413µS, 12.88mS, 84µS), screwdriver (for battery replacement), instruction manual, carrying case Compatibility
Reviews
Based On 10 reviews.
-
Client 9/29/2021
works better than Orion and not even half the price
It's awsome, works better than Orion and not even half the price.....
-
Ryan Manning 9/29/2021
Great value
The meter is simple to use and set up. I was in a real bind to get an instrument and their response/shipping time was excellent. I have enjoyed using it.
-
Butch 9/26/2021
Finally a meter I can trust!
Instructions are clear, and a quick start laminated sheet as well!!
Calibration is easy and it's been holding fantastic! -
Leah Davis 9/26/2021
Electrode cracked after 3 CAREFUL uses.
Seems to be poor quality electrode. Following instructions for cleaning and the electrode is cracked at the bottom. Now I will have to order more.
-
funbear 9/9/2021
when u need accurate pH readings, this is the product...
you can buy a pH digital tester for $15....
they can get you close...
but when you need ACCURATE, RELIABLE and CONSISTENT readings, this is top of the line pH meter.
For any meter to be accurate, it must be calibrated. This kit comes with several calibration kits for different ranges of ph readings. IMO, this is the ONLY way to properly calibrate. Similar to a temp sensor... why calibrate it at -30F if you are reading temps at 250 deg. Same true here... you must calibrate by using a standard close to the pH you will be testing.
The machine itself is large, robust, built to last. I compared these readings to some of my lower cost pH readers and this meter consistently read about 10-20% different. I have to trust this meter of course, as I had it finely calibrated. I test water pH to maintain specific levels, so knowing the proper ph is critical, so the product is ideal for my applications. For other applications, a lower cost pH meter will suffice, so you consider this when selecting a meter.
Resolution .01, numbers easy to read, good contrast on display. Hard to find a flaw with this unit. Insructions are well written.... -
GearFreak 9/9/2021
Decent pH meter, not as good as the true lab grade brands
This is a fine pH meter, just nowhere near as good as the meters commonly used in professional and academic labs. I am not sure this is worth their asking price. The reason I took off a star was for the high (in my opinon) retail price.
This meter seems relatively precise (repeat readings were within a few hundredths of each other). I am not positive how accurate it is, as I don't have proper NIST traceable solutions to test with. I tested the included calibration solutions, as well as some extech single use calibration packets I had. The Extech solutions were technically expired, so I don't know which solution was more accurate. The readings for the two buffers disagreed by about 0.1 to 0.15. It is still relatively close. I do not have any reference solutions between the standard 3-point calibration values of 4, 7, and 10, so I couldn't test how well the calibration curve on this meter worked.
Apera seems to market this meter as a lab grade meter, for a lower price. I don't know if I agree with that. I would classify this as a slightly more accurate consumer meter, for an increased price. True lab grade meters will have extra features this unit lacks, such as more calibration options (5-point curves, etc.), data logging/export, GMP compliance, etc. All the other lab grade meters I've used (Mettler, VWR, Thermo, etc.) feel much more robust than this meter does.
There are some features that I do like. The included hard case is a nice touch. It fits everything nicely, and although the case isn't as robust as a Pelican case, it will protect the meter from mild abuse. I like that there is extra room inside the case -- I can store the batteries outside of the meter. I prefer to store batteries out of the meter if I am not going to use it for a while, just in case the batteries leak. I put the batteries in a plastic bag so it's easy cleanup if they leak -- the photos do not show this. I also appreciate that Apera put captive screws on the battery cover -- I always hate losing tiny battery compartment screws, and this will prevent that from happening. I do appreciate that Apera shipped the electrode with a proper 4M KCl solution to keep the electrode fresh. While I appreciate the inclusion of reference buffers, the seal on the buffer bottles was very difficult to open, and I would feel more comfortable with the buffers in a Nalgene bottle instead of this style of bottle that has a coated paper type sealing disk -- these tend to leak after a while.
Overall, this meter works well enough, seems to be more accurate than the really cheap meters you can find on Amazon, but doesn't come close to the quality and features of a true lab grade meter. For the retail price here, I think you would be better served buying a lightly used/reconditioned lab grade meter. I am not really sure what market Apera is trying to target with this meter -- most of the people/industries that require very high accuracy and precision will usually have enough funds to get a proper lab meter; the home/recreational/hobbyist market will usually be served just fine by the cheaper pH meters or single-use strips. -
Earth Spirits 9/7/2021
Rugged, Accurate and Complete with Case
I do like this kit from Apera. I have been using one of their Pen Style kits for several years now and consider the brand very good in the measuring and instrumentation fields.
The meter body is very robust and durable. It also is relatively light weight and is water resistant. The 4 buttons are easy to press and operate. The housing has a rubberized shell that doesn't slip in hand. It is easy to hold with one hand and use.
The Auto Temperature Compensating probe is high quality and connects via a black RCA connector for Temp and a blue BNC connector for pH. The third cap to the left of those two is just a blank spot.
The electrode is high quality and features a housing around the glass tip. It is one of their higher end probes.
It is good for use in probe holders and makes an excellent bench top unit. The meter runs off of 3AAA batteries and so isn't made for continuous monitoring.
I like the case as it holds all the essentials and protects everything in a lightweight yet sturdy and convenient to carry form factor.
For field use where a pen style may be too large or less ideal this comes with an almost 3' lead on the electrode.
5 stars for quality at a good value. -
Joshua Davies 9/7/2021
Setup was quick and the measurement was surprisingly accurate
It's made in China, so the instructions are a little bit difficult to decipher, but when you first get the meter, you're supposed to calibrate it using three (provided) pH solutions. The calibration is pretty quick and easy - just press the "cal" button, dip the sensor in the solution, wait for the smiley face icon to appear (seriously), and press the "done" button. Apparently the sensor can work after calibrating with just the 7 pH solution, but the accuracy is increased if you calibrate three times with each of the different 7,4 and 10 pH solutions, which I went ahead and did. (If you press the calibration button again after calibrating with the 7 pH solution it know to expect the 4 pH).
Once it was calibrated, I used it to measure the pH level in my pool and I was a little surprised by how quick and accurate the reading was. I've been making do with the colored test strips that most pool owners use, and I could see that my pH was on the high end of acceptable, so somewhere between 7 and 8, but this meter measured it to exactly 7.8, in several places in the pool.
Definitely recommended for accurate, unambiguous pH measurement: this thing gives me a reading faster than the chemical test strips do! -
Beat a ’Bhèist 9/3/2021
This Is A Good Quality Instrument- However Requires Considerable Calibration
One obtained this to test drinking water. It is a good quality instrument, the directions are clear, but requires quite a bit of continuous calibration.
This is good for professional level water testing.
Due to almost continuous calibration gave 4-Stars. -
JD 9/3/2021
I actually got this to test our pond water and drinking well supply.
Pros:
- Accurate 1-3 point automatic calibration
- Temperature compensation
- Self-diagnostics
- Auto shut-off
- RoHS compliant (Meaning it should have no hazardous materials found in electrical and electronic components)
- IP57 Rating (Meaning it is supposed to withstand submersion in water up to 1 meter)
- ISO 9001:2015 compliant (Basically quality standards)
Cons:
- Does not come with test vials
- This is a Scientific Instrument so its uses are limited to only general water solution pH measurements
This item comes with the following:
- Portable Case
- pH Meter
- Electrode Wand
- 3x Standard Buffer Solutions
- Phillips head Screwdriver
- Flexible Cord to connect Electrode Wand to pH Meter
So first things first, how does a pH meter work. Basically the tester measures the mV (millivolts) from a standard known solution and compares it to a sample solution that you want to test. The tester uses the difference in the mV to deduce the pH. Thats as simple as I can put it.
I fully advise that you read the manual a couple times before use of this item. You should also have a couple other things handy that they kit does not come with. Some testing vials and distilled water. It is helpful to have the vials so you can use the buffer solutions and extend the supply as long as possible. It comes with 3 buffer solutions.
pH 4.00
pH 7.00
pH 10.01
With 3 buffer solutions that gives you two options. To calibrate with 1, 2 or 3 point buffer solutions. Two point calibration will give you accurate readings but 3 point calibration will give you the most accurate readings. I did find that I had to calibrate this unit each time I used it. I prefer calibrating across the 3 points for the best reading. However, you don't get a lot of solution so each time you calibrate the unit. The sample solution you used for the calibration technically should be discarded as it is contaminated. I calibrated the unit a number of times over a few days testing various water supplies. In the process, went through about 1/4 of the buffer supply. I suggest using narrow testing vials that are slightly bigger than the wand so you don't have to use as much buffer solution per calibration. Also, ensure that you rinse the electrode with distilled water and pat dry each time you submerge the electrode in a solution. You should never touch the wand tip (or wand to be safe, just a good practice) with your hands. you should always hold it from the black cord couple. Also you should soak the electrode in distilled water for at least 5 minutes before using it for the first time. Or before each use is a good practice but not required. It's just a good practice.
I found to Ph Meter to be fairly accurate. However, testing this against my $40.00 tester provided relatively the same results within .07. This unit has a pretty hefty price tag and it is geared for the professional. While I think the unit is accurate. I would not say that I would consider this lab quality. Also in my opinion, you will go through the buffer solution fast, so I recommend getting more if you test often. I have not used the Apera buffer solutions before. While the Apera buffer solutions tested accurately enough against the NIST solutions I usually use. I prefer a different supplier. As the Apera buffer supply that comes with the kit has no expiration date so you have no idea how long this has been sitting around or when it is no longer effective to use for calibration. All in all, a decent tester. I will update the review later after more prolonged testing.
NOTE: There was a card included in the kit that advised if you leave a review on Amazon and copy and paste it into and email they supply. They will provide you with the following at no cost.
- pH 4.00 Buffer solution
- pH 7.00 Buffer solution
- pH 10.01 Buffer solution
- 3M KCL storage solution
- Apera CaliPod
- Probe-cleaning Ultra-soft brush
The bottles of buffer solution in the picture for this offer look at least 3 times bigger than the ones you get with the kit. I will follow up on this and see if they actually send it out
This product is made in China -
Justin Herman 9/2/2021
Good for hydroponics
I grow vegetables in an indoor hydroponic garden and I bought this meter to closely monitor the pH of my solution. I tested it against controls and it is spot on. It is simple to use and a great addition to my hydroponics set-up.
-
Trung 9/2/2021
Awesome quality meter.
The quality of this meter is well made. Tested the accuracy to all of my hanna and bluelabs meters. Calibration solution is provided. Comes in a nice hard case. Been using for mixing my hydroponics nutrients tank. Overall pleased with the quality of this meter.
-
Webb 9/1/2021
Accurate and handy, good instructions
This is our first pH meter. We purchased it to take our kombucha brewing to the next level. The included instructions were somewhat technical but also fine for the new user. It was great that it included everything needed for calibration besides distilled water. The included case is sturdy and good for holding everything. The screen is clear and easy to read. The feature where it comes up with a little happy face when the reading has settled is nice to remove the guesswork.
-
ekerry 9/1/2021
Quick and easy PH measurements
The unit only took a minute to setup and calibrate. The box came with all the solutions, batteries and was ready to go after setup. Makes it a snap to check the PH in my pool. Made multiple readings and the results were constant. For my use I found it is a good tool, easy to use and ready to go out of the box with everything included.
-
CaptainWhite 8/31/2021
Accurate(if you calibrate properly), sturdy built, okay for professional type use.
I studied physics thats why i was not so much stranger to use this unit first time and later, but i will make my review as simple as possible, make understandable for last users:
PH meter working very accurate if you calibrate properly.
For first time using you can check instruction or you can find some videos on google “how to calibrate ph meter, how to use ph meter”
Item built up in good quality and mine is working properly and sturdy.
Im actively using it for checking ph my aquarium(reef tank) its very important for this systems to keep same Ph and all chemistry.
Maybe pricing strategy can be little different but seems still worth it for this kind of professional type of machines. -
Greg 8/31/2021
Robust field meter with OK case, 3 cal ref solutions, and storage buffer jar
I've been setting up a little home lab, partly in nostalgia for my college chemistry days, partly in my new role as amateur inflatable hot tub pool boy, and partly because I'm actually developing a couple of solutions for a project I'm working on.
CONSTRUCTION
This is a solid little meter. The impact-resistant plastic case fits snugly, with the battery cover behind the flip-out stand. As is expected for a field device, all the switches are membrane and large enough to manipulate with gloves on. There is a removable silicone sleeve to protect the plastic from drops and provide a little extra grippiness. The single-color LCD screen is clearly laid out, though it doesn't have a light. I left the little plastic protective film on, because what's a little extra protection, right? It doesn't hinder the legibility of the display.
The probe capsule itself is light blue transparent plastic, with the temperature sensor and pH glass bead protected from damage by a cage at the tip. The permanently filled pH bulb has an air bubble in it, so I found myself giving it a light tap to dislodge any air from the bead before taking a measurement.
CALIBRATION
The unit is preset for a three-point calibration at pH 7.00 (1), 4.00 (2), and 10.01 (3) using reference standard solutions provided in the kit. I didn't see any actual traceability certification on the provided solutions, so plan to get your own NIST-traceable set if you're planning on taking certified/repeatable measurements. Likewise, the 'quality certificate' that comes with the unit is neither signed nor traceable to a NIST standard, so you'll have to send this out to a metrology service to have it calibrated if you need traceable calibration.
For typical diagnostic use, the provided solutions are adequate.
The calibration process is simple - just press the CAL button, place the capsule end in the reference solution, and wait for the smiley-face (stable measurement) icon to pop up on the screen, then press SETUP to save. Repeat twice for points 2 and 3. While the unit will operate in Low (1 cal point), Med (2 cal points), and High (3 cal points), I cannot figure out why you'd want to operate in anything but high. Who trusts a device with less than 3 cal points to have anything approaching linear accuracy?
From what I could tell, the factory calibration hadn't drifted significantly during storage.
Also, if you're a noob to this kind of meter, don't be put off by the increasing measurement tolerance between low and high pH listed on the certificate. Remember that pH is a logarithmic scale, so you should expect the absolute tolerance limits to be greater at higher pH by an order of magnitude per unit. What's important is the ratio between the absolute measured value and the range of deviation.
OPERATION
Dead simple. I included some demonstration measurements of distilled water, white vinegar, and my (too acidic) hot tub. Readings stabilized within seconds, though some took up to twice as long, probably due to local conditions in the measured solution. I never did get a reading error due to lack of stabilization.
CONCLUSION
A respectable portable meter that is robust enough to stand up to daily field use, but be prepared to get traceable reference solutions for calibration and to send the unit out for a true calibration cert if you need that for your application. -
William C. 8/30/2021
Love the Apera meters
Super accurate and fast, a real pleasure to use in hard to reach areas. I have owned the PH20 and PH60 also....I once lost the PH60, found it in a reservoir when I emptied it a couple weeks later...looks bad but worked perfectly! I have had nothing but reliable, accurate readings from all of my Apera meters. I recommend this meter and their other meters as well. The quality to price just isn’t being beat.
-
Andrew 8/30/2021
first one was defective but easily replaced
The first meter I received calibrated once and after two uses wouldn't hit the 2nd calibrating point. called Apera and they suggested replacing it.The process was very easy and I got the meter two days later. The meter itself seems like a good meter for someone serious about their ph readings. the ruggedness of the meter seems like it would withstand some abuse but the default probe is plastic and should definitely be handled with care. I feel that it is superior to my blue lab multi meter by working faster and allowing for three point calibration. I am writing this review because Apera offer free calibration solution if reviewed. the free stuff had no impact on my views of the product.
-
Greg C 8/27/2021
Easy to use and accurate
I've been holding off on purchasing a decent pH meter for over a year and probably did not need one that matches the quality and accuracy of the one that is included in the Apera Instruments Value Series PH850 Portable Handheld pH Meter Kit. Nevertheless, I'm very please with my purchase.
The ph meter and probe appear to be well built and durable, the 3-point calibration process is very simple to follow and can be accomplished quickly, the carrying case is convenient for storage and portability of the meter, probe, buffer solutions, etc., and the instruction manual is relatively easy to follow. I feel confident I completely understand how to operate the meter and select my preferred operating parameters.
I'm happy with my purchase.
Thanks APERA! -
mark h. pausch 8/27/2021
meter is accurate and provides reliable assessment of acidity in a simple to use format
We use this pH meter to assess the acidity of our newly made wines. The accuracy of the acid measurement provided by this pH meter enables us to proceed thru subsequent steps in the wine making process.
-
Customer 8/26/2021
High Quality
This product is of high quality and accurate. Fast shipping!
-
Lisa Yoder 8/26/2021
Easy of Use
I was very pleased with the easy of setup and use of the meter. The accuracy has been very good.
-
Gen of North Coast Gardening 8/25/2021
Super nice pH meter for pulling soil pH
We had been using a similar product that was a little bit lowerend from our local horticultural supply store to pull soil pH with distilled water from our landscapes that my company maintains. With the other model, we were getting slightly variable readings from the same area of the garden, but this model is giving much more consistent and presumably accurate readings.
I've been really impressed with the ease of use as well as the consistency of the measurements. The other one gave us a general idea of the pH range, but this one is getting us much more accurate and allowing us to target our soil treatments more accurately as well. -
Lori Turner 8/25/2021
Reliable and Easy-to-Use
As someone who writes Standard Operating Procedures for a living, I always appreciate a well written instruction manual that is easy to follow.
My first attempt at a three point calibration was successful with maybe 0.3 uncertainty max, keep in mind your buffer solutions have labels that show their variance in temperature and I live in Texas so this is still decent for it being hot the day it arrived. Second attempt at a three point calibration went perfectly, on the dot for low, middle, and High! Some advice would be to make sure whatever solution or slurry you are measuring it as close to the temperature of your buffer solutions.
-
We warrant this instrument to be free from defects in material and workmanship and agree to repair or replace free of charge, at the option of APERA INSTRUMENTS, LLC, any malfunctioned or damaged product attributable to the responsibility of APERA INSTRUMENTS, LLC for a period of THREE YEARS for the instrument and SIX MONTHS for the probe from the delivery.
This limited warranty does NOT cover any issues due to:
- Accidental damage
- Improper use
- Normal wear and tear
- Transportation
- Storage
- Failure to follow the product instructions
- Unauthorized maintenance, modifications, combination or use with any products, materials, processes, systems or other matter
- Unauthorized repair
- External causes such as accidents, abuse, or other actions or events beyond our reasonable control.
