10 best ppm ph meter for 2022

Finding your suitable ppm ph meter is not easy. You may need consider between hundred or thousand products from many store. In this article, we make a short list of the best ppm ph meter including detail information and customer reviews. Let’s find out which is your favorite one.

Product Features Editor's score Go to site
Bluelab 716441 Combo Meter for Plant Germination Bluelab 716441 Combo Meter for Plant Germination
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Water Quality Test Meter Pancellent TDS PH EC Temperature 4 in 1 Set Water Quality Test Meter Pancellent TDS PH EC Temperature 4 in 1 Set
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Water Quality Test Meter Pancellent TDS PH 2 in 1 Kit 0-9990 PPM Measurement Range 1 PPM Resolution 2% Readout Accuracy Water Quality Test Meter Pancellent TDS PH 2 in 1 Kit 0-9990 PPM Measurement Range 1 PPM Resolution 2% Readout Accuracy
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HM Digital TDS-EZ Water Quality TDS Tester, 0-9990 ppm Measurement Range, 1 ppm Resolution, 3% Readout Accuracy HM Digital TDS-EZ Water Quality TDS Tester, 0-9990 ppm Measurement Range, 1 ppm Resolution, 3% Readout Accuracy
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Apera Instruments PC60 Premium 5-in-1 Waterproof pH/Conductivity/TDS/Salinity/Temp. Multi-Parameter Pocket Tester, Replaceable Probe Apera Instruments PC60 Premium 5-in-1 Waterproof pH/Conductivity/TDS/Salinity/Temp. Multi-Parameter Pocket Tester, Replaceable Probe
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HoneForest Water Quality Tester, Accurate and Reliable, TDS Meter, EC Meter & Temperature Meter 3 in 1, 0-9990ppm, Ideal Water Test Meter for Drinking Water, Aquariums, etc. HoneForest Water Quality Tester, Accurate and Reliable, TDS Meter, EC Meter & Temperature Meter 3 in 1, 0-9990ppm, Ideal Water Test Meter for Drinking Water, Aquariums, etc.
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VIVOSUN pH & TDS Meter Combo, 0.05ph High Accuracy Pen Type pH Meter & +/- 2% Readout Accuracy 3-in-1 TDS EC Temperature Meter VIVOSUN pH & TDS Meter Combo, 0.05ph High Accuracy Pen Type pH Meter & +/- 2% Readout Accuracy 3-in-1 TDS EC Temperature Meter
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Bluelab Guardian Monitor for Plant Germination Bluelab Guardian Monitor for Plant Germination
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Hanna Combo pH/EC/TDS/C/PPM Tester HI98129 Hanna Combo pH/EC/TDS/C/PPM Tester HI98129
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Pancellent Water Quality Test Meter TDS PH 2 in 1 Set 0-9990 PPM Measurement Range 1 PPM Resolution 2% Readout Accuracy (Yellow) Pancellent Water Quality Test Meter TDS PH 2 in 1 Set 0-9990 PPM Measurement Range 1 PPM Resolution 2% Readout Accuracy (Yellow)
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Reviews

1. Bluelab 716441 Combo Meter for Plant Germination

Feature

Measures pH, temperature and EC, ppm 500, ppm 700 and CF
Lightweight and portable.Probe cable length: 6.5 feet
Successful pH calibration indicator
Replaceable Double Junction pH Probe included
Auto off function. Please see page 3 onwards for set up info, see page 12 for troubleshooting in the user manual attached in the catalog below.

Description

Measures conductivity, pH and temperature
5 year Limited Guarantee
Bluelab Combo Meter

The Bluelab Combo Meter is a portable Meter that takes measurements of pH, conductivity and temperature within a solution. The correct pH, conductivity and temperature levels of a nutrient solution is critical for healthy successful growth. If you are experiencing problems with yellow leaves, or slow stunted growth, the Bluelab Combo Meter will soon tell you if each parameter is within the plants requirements. Adjustments can be quickly made to get your crop back on track.


Features
  • Measures pH, conductivity(EC, CF, ppm 500 and ppm 700)and temperature(C,F)
  • Lightweight and portable
  • Large easy to read display
  • Simple push button pH calibration
  • Successful pH calibration indicator
  • No calibration required for conductivity and temperature
  • Replaceable double junction pH probe included
  • Over range and under range indicators
  • Low battery indicator
  • 2 x AAA alkaline batteries included
  • Auto off function
'The Cadillac of Meters'
It's all you need for simple and reliable crop management

The Bluelab Combo Meter has two probes, a Bluelab pH Probe and a Bluelab Conductivity / Temperature Probe. The Conductivity / Temperature probe is permanently fitted to the Meter, whereas the pH probe is replaceable. This is due to the fact that pH probes have a limited life and age through normal use. Replacement pH probes can be purchased separately.

You can also connect a Bluelab Soil pH Probe to the Combo Meter to take direct pH soil measurements or measure the pH of a soil solution. The soil pH probe can also measure solutions. Bluelab Soil pH Probes can be purchased separately. Both probes require cleaning at least once a month and it is recommended to use the Bluelab pH and Conductivity Care kits. These care kits are made specifically for Bluelab instruments to increase probe life and ensure you are always receiving accurate readings.

Large easy to read display
The simplest Meter in it's class

When taking a reading, simply place both probes into the solution and the selected reading is displayed on screen. Both probes may be fully submerged into the solution. As the Bluelab Combo Meter is portable and does not require a power supply to operate, it can be used anywhere, anytime to help you manage your crops daily nutrient requirements.

Calibration of the pH probe is simple and the instructions are supplied on the back of the meter. The push button calibration method makes this one of the simplest meters to use. Successful pH calibration indicators on the screen guide you through so you know the reading is reliable. After 30 days the calibration indicators will disappear, letting you know calibration is due. The Conductivity / Temperature probe does not require calibration as this is locked in during manufacture.

2. Water Quality Test Meter Pancellent TDS PH EC Temperature 4 in 1 Set

Feature

[ Convenience Use ] 5 Seconds know water quality, Accuracy, Faster. This set Combo of TDS PH EC Temperature. Also it have Best Price, Trustable Quality, all make it be your FIRST water quality Test.
[ How Accuracy? ] PH resolution is 0.01pH,accuracy 0.05pH.TDS:0~9990ppm,Conducitivity:0~9990us/cm,Accuracy:2%.This's same as big brand resolution in Amazon, but Pancellent test only need half price of them.
[ Lasted Model ] PH pen have AUTO CALIBRATION function, not need any kind of screwdrivers to calibrate the pH pen tester.TDS pen have Lock & auto shut off function.
[ Pocket Portable ] Small size but Suitable for testing pH balance of drinking water, pool, aquarium, RO system, Spa, or hydroponics.
[ Money Back Guarantee ] Pancellent (Plan of excellent) to provide 30 days Money Back Guarantee and 120 days Replacement Service.

Description

Little Money to Know Water Quality
The Pancellent TDS EC PH Meter set is a professional level water test meter.
Application: pure water production and drinking, tap water, well water, sea water, fish tank water,
swimming pool water, amniotic fluid early break, soil, aquaculture, food processing, saliva,
enzyme, chemical experiment, ionized water, PH value of human urine and so on.

PH Meter Specifications:
Measure Range : 0.00 - 14.00 pH
Resolution : 0.01 pH
Accuracy : 0.01 pH
Automatic Temperature Compensation : 0 - 60 / 32 - 140
Calibration : Two Points Automatic Calibration Button
Button battery: 2 x 1.5V LR44(keep using more than 500 hours)
Dimension:155mm*31mm*18mm
Weight:50g

TDS EC Temperature Meter Specifications:
Lock function - makes it easy to read and record, press HOLD button then remove from test solution.
4 Display modes: press SHIFT button: TDS - ppm & C, EC - s/cm & C, TDS - ppm & F, EC - s/cm & F.
5 minute Auto Shut Off feature, so battery won't run down.
Measurement Range: Conductivity: 0 - 9990 s/cm TDS: 0 - 9990 ppm (parts per million) Degrees
Celsius: 0.1 - 80.0C, Fahrenheit: 32.0 - 176.0F
Accuracy: 2%
Net weight: 55g
Size: 154 x 30 x 14 mm
Tips:TDS = Total Dissolved Solids, which is any salt, metal or mineral in the water.

Package Includes:
1 x PH Meter
1 x TDS EC Temperature Meter
2 x Calibration packets
2 x User's manual

About Pancellent:
Pancellent was a registered brand in United States and European Union. It mean plan of excellent.
We are doing our best to providing each customer with the highest standard of customer service.
All our product have 30 days Money Back Guarantee and 120 days Replacement Service.

3. Water Quality Test Meter Pancellent TDS PH 2 in 1 Kit 0-9990 PPM Measurement Range 1 PPM Resolution 2% Readout Accuracy

Feature

[ Convenience Use ] 5 Seconds know water quality, Accuracy, Faster. This set Combo of TDS PH. Also it have Best Price, Trustable Quality, all make it be your choose of water quality Test.
[ How Accuracy? ] PH resolution is 0.01pH,accuracy 0.01pH.TDS:0~9990 ppm, Accuracy:2%.This's same as big brand resolution in Amazon, but Pancellent tester only need half price of them.
[ Lasted Model ] PH pen have AUTO CALIBRATION function, not need any kind of screwdrivers to calibrate the pH pen tester.TDS pen have Lock & auto shut off function.
[ Pocket Portable ] Small size but Suitable for testing pH balance of drinking water, pool, aquarium, RO system, Spa, or hydroponics.
[ Money Back Guarantee ] Pancellent (Plan of excellent) to provide 30 days Money Back Guarantee and 120 days Replacement Service.

Description

Little Money to Know Water Quality
The Pancellent TDS PH Meter set is a professional level water test meter.
Application: pure water production and drinking, tap water, well water, sea water, fish tank water,
swimming pool water, amniotic fluid early break, soil, aquaculture, food processing, saliva,
enzyme, chemical experiment, ionized water, PH value of human urine and so on.

PH Meter Specifications:
Measure Range : 0.00 - 14.00 pH
Resolution : 0.01 pH
Accuracy : 0.01 pH
Automatic Temperature Compensation : 0 - 60 / 32 - 140
Calibration : Two Points Automatic Calibration Button
Button battery: 2 x 1.5V LR44(keep using more than 500 hours)
Dimension:155 x 31 x 18 mm
Weight:50g

TDS Meter Specifications:
Lock function - makes it easy to read and record, press HOLD button then remove from test solution.
5 minute Auto Shut Off feature, so battery won't run down.
Measurement Range: TDS: 0 - 9990 ppm (parts per million)
Accuracy: 2%
Automatic temperature compensation: can automatically change the value of the value of 25 .
Working temperature: 0 ~ 50
Ambient relative humidity: <85%
Net weight: 28g
Size: 142 x 23 x 13 mm
Tips:TDS = Total Dissolved Solids, which is any salt, metal or mineral in the water.

Package Includes:
1 x PH Meter
1 x TDS Meter
2 x Calibration packets
2 x User's manual

About Pancellent:
Pancellent was a registered brand in United States and European Union. It mean plan of excellent.
We are doing our best to providing each customer with the highest standard of customer service.
All our product have 30 days Money Back Guarantee and 120 days Replacement Service.

4. HM Digital TDS-EZ Water Quality TDS Tester, 0-9990 ppm Measurement Range, 1 ppm Resolution, 3% Readout Accuracy

Feature

Economy model that is ideal for end-users. Highly efficient and accurate due to its advanced microprocessor technology.
Hold Function: saves measurements for convenient reading and recording and battery life is approx. 1000 hours of usage and power source is 2 x 1.5V button cell batteries (included) (LR44 or equivalent)
Auto-off function: the meter shuts off automatically after 10 minutes of non-use to conserve batteries. Display: large and easy-to-read LCD screen.
Measurement Range: 0-9990 ppm. From 0-999 ppm, the resolution is in increments of 1ppm. From 1000 to 9990 ppm, the resolution is in increments of 10ppm, indicated by a blinking 'x10' image. Fun, translucent blue housing that's very strong and durable.
TDS-EZ meters are calibrated with a 342 ppm NaCl solution. Meters can be recalibrated with a mini-screwdriver. Includes a TDS chart sticker on the back of the meter that explains TDS values.

Description

Product Description: A TDS meter (aka ppm pen, nutrient tester, tds stick) is an inexpensive and convenient digital tool to instantly check your overall water quality. TDS = Total Dissolved Solids, which is any salt, metal or mineral in the water. With the push of a button, the TDS-EZ can tell you your overall water purity level, which will be displayed on the screen in ppm (parts per million). The lower the TDS level, the purer the water, with 0 ppm being pure H2O. The TDS-EZ is great for checking your tap water quality, or knowing when to change a filter. (The meter does not test for biological contaminants.) The TDS-EZ is a great tool for drinking water, water filtration and purification, hydroponics (test your nutrients), aquariums, RO/DI systems, pools and spas, and more.

5. Apera Instruments PC60 Premium 5-in-1 Waterproof pH/Conductivity/TDS/Salinity/Temp. Multi-Parameter Pocket Tester, Replaceable Probe

Feature

Simultaneously tests pH/EC/TDS/Salinity/Temp. in a quick,accurate, and reliable manner
EASY-TO-INSTALL Replaceable Multi-parameter Probe with EASY measuring mode switch
Auto recognition of stable values (with optional AUTO HOLD function) improves consistency so you don't have to guess when to manually hold measurement
LARGE CLEAR viewing angle screen with 3 backlit color (indicating 3 different modes), dual display of temp./pH/EC/TDS/Salinity, and indications of completed calibrations and stable readings
COMPLETE KIT with READY-TO-USE calibration solutions, calibration bottles, storage solutions, AAA batteries, and a lanyard all in a portable carrying case

Description

The Apera Instruments PC60 Multi-parameter Tester simply tests pH, EC, TDS, Salinity &Temperature in an ACCURATE, QUICK & Professional manner for all kinds of regular water solutions such as hydroponics, aquaculture, pools& spas, tap/drinking water, water treatment, cooling towers, etc. The multi-parameter probe is replaceable.

1 to 3 points of Auto Calibration and 0 to 50C Auto Temperature Compensation (ATC), 0.01 pH, 1% F.S, 0.5C accuracy with -2.00 to 16.00 pH & 0 to 20.00 mS/cm measuring range, auto recognition and reminders of stable values improves consistency, saving you the trouble of guessing when to manually hold measurement (auto hold function available).

Easy menu setting, customizing your testers functions according to your needs. Smart self-diagnosis, warning of out-of-range measurement and incorrect calibrations. IP67 waterproof and dustproof, floating on water so you dont have to worry if it falls into water by accident. Up to 2000 hours' continuous operation (without backlit) powered by AAA batteries (with low power warning and auto power off in 8 min if no operation).

Comes with a complete kit of premixed calibration solutions (4.00 and 7.00), soaking solutions (3M KCL), calibration bottles, AAA batteries, and a lanyard all in a portable carrying case.

The meter is CE certified and comes with a 2-YEAR Warranty (6 months for the probe). The company designs and manufactures scientific analytical instruments like meters and sensors for pH, conductivity, turbidity, and dissolved oxygen for over 25 years, and meets ISO 9001:2008 Standards.

NOTES: The instrument will NOT give accurate or stable readings for distilled or deionized water's pH testing (conductivity testing works well in distilled water). This is because distilled and deionized water do not have enough ions present for the electrode to function properly in pH measuring. To measure distilled or deionized waters pH, users need to use a specialized pH electrode. Do NOT store the probe in distilled water or deionized water because they will cause damage to the glass membrane of the pH probe. Only use distilled water for cleaning the pH probe.

6. HoneForest Water Quality Tester, Accurate and Reliable, TDS Meter, EC Meter & Temperature Meter 3 in 1, 0-9990ppm, Ideal Water Test Meter for Drinking Water, Aquariums, etc.

Feature

ACCURATE AND RELIABLE: To achieve high accuracy, equipped with premium quality titanium alloy probe, and reliable Automatic Temperature Compensation (ATC) ensures reading always be accurate at various temperatures.
MULTIFUNCTIONAL AND UPGRADED: Professional TDS, EC and Temperature Pen 3 in 1. Upgraded with big backlit LCD for easier reading, and auto-lock function for easier use.
EASY AND INSTANTLY: Just turn TDS meter on and stir water gently, then stabilized readings will be auto-locked on LCD in seconds, and the tds ppm meter will shut off automatically if without operation over 2 minutes.
MULTIPURPOSE TDS TESTER: Test drinking water purity to ensure it's healthy, monitor if Reverse Osmosis (RO)/DI System works properly, whether filter need replaced, maintenance aquarium, hydroponics(test nutrients), pool and spa, etc.
3 YEARS WARRANTY. And we offer 90 days Money Back Guarantee if not totally happy with the digital TDS water tester meter.

Description

Super accurate, reliable and easy to use TDS, EC &Temp water tester reader, with backlit and auto-lock function, 3 years warranty and 90 days money back guarantee.
This advanced digital ppm meter pen with Advanced Microprocessor Technology, combines TDS Meter(Total Dissolved Solids), EC Meter(Electrical Conductivity) and Temperature meter all in one ergonomically designed pen.

Widely be used for all Water Quality Testing, Water Purification Applications, Aquaculture, Hydroponic, Pool & Spa, Colloidal Silver, Water Treatment and more.
It's a must have handy tool for every household, testing for tap water, filtered water, distilled water, bottled water, well water, refrigerated water, etc.

Features:
* Automatic Temperature Compensation(ATC)
* Equipped with backlit LCD for easy reading.
If TDS40, the backlit color is green,
If TDS>40, the backlit color is red.
* Auto-Lock Function: From test beginning, the reading can be stabilized in seconds, and locked automatically for easy read and record.
* Hold Function: Before reading locked automatically, the reading can be locked manually if press "HOLD".
* Factory Calibrated: No need calibration by user.
* Auto-Off in 2 Minutes to conserve battery.
* A colorful TDS chart on the back to explains ppm readings.
* Includes a protective carrying case with belt clip, easy to carry.

Specifications:
* Measuring Range:
TDS: 0 - 9990 ppm (parts per million)
Conductivity: 0 - 9990 s/cm
Degrees Celsius: 0.1 - 50.0C
Fahrenheit: 32.0 - 122.0F
* Accuracy: 2% F.S
* Net Weight:1.62oz(46g)
* Size:6.29 x 1.14 x 0.59 inches (160x29x15mm)

Package Including:
1x TDS Meter
1x HoneForest Instruction
1x portable leather bag
1x HoneForest color box

7. VIVOSUN pH & TDS Meter Combo, 0.05ph High Accuracy Pen Type pH Meter & +/- 2% Readout Accuracy 3-in-1 TDS EC Temperature Meter

Feature

Great for all home and laboratory TDS & pH testing applications including aquariums, swimming pools
pH meter: Full measurement range of pH 0 - 14, reliable and quick readings
3-in-1 TDS meter: Measurement Range 0-9990ppm, 0-9990s/cm; Accuracy 2%, 0.1- 80.0C, 32.0-176.0F.
Comes with protective case; Lightweight, handheld design for portability and convenience

Description

Your 1# Choice to Know Water Quality

The VIVOSUN TDS EC PH Meter Set is a professional water quality test meter.

PH Meter Specifications:
Measure Range : 0.00 - 14.00 pH
Resolution : 0.01 pH
Accuracy : 0.05 pH
Calibration: Two Points Automatic Calibration Button
Power Supply: 2 x 1.5V LR44 Button Battery (keep using more than 500 hours)
Dimension:155mm*31mm*18mm
Weight:50g

3-in1 TDS EC Temperature Meter Specifications:
Lock function - makes it easy to read and record, the instrument will lock the reading result.
After the numerically result gets stable, press HOLD button then remove the meter out of test solution to read.
4 Display modes: press SHIFT button: TDS - ppm & C, EC - s/cm & C, TDS - ppm & F, EC - s/cm & F.
5 minute Auto Shut Off feature, so battery won't run down.
Measurement Range
Conductivity: 0 - 9990 s/cm
TDS: 0 - 9990 ppm (parts per million)
Degrees Celsius: 1.0 - 80.0C
Fahrenheit: 32.0 - 176.0F
Accuracy: 2%
Net weight: 51g
Size: 154 x 30 x 14 mm
Tips: TDS = Total Dissolved Solids, which is any salt, metal or mineral in the water.

Package Includes:
1 x PH Meter
1 x 3-in-1 TDS EC Temperature Meter
2 x Calibration Packet
2 x Carrying Case
2 x User Manual

8. Bluelab Guardian Monitor for Plant Germination

Feature

Large easy to read green led displays
Selectable values for conductivity and temperature
Flashing high and low alarms
Greater tolerance to rf/electronic interference provided
Simple push button ph. calibration.A flashing display means that you can know if one parameter moves away from the proper

Description

n just one glance it clearly conveys all 3 critical parameters for successful growth: pH, conductivity AND temperature.

The Bluelab Guardian Monitor is a constant indicator of the desired levels of EC/ppm 700/TDS/CF, pH and temperature, enabling the grower to optimise these parameters as the crop progresses through each growing phase.

The Bluelab Guardian Monitor is mains powered and is mounted to the wall or hung on a support and the probes simply placed into the reservoir.

With the Bluelab Guardian Monitor monitoring your crops 24 hours a day and with the ability to set high and low alarms, a flashing display lets you know if one parameter moves away from the ideal, allowing you to make the required adjustments quickly and effectively.

Features
Large easy to read displays
No calibration required for conductivity and temperature
Simple push button pH calibration
Selectable values for conductivity and temperature
Flashing high and low alarms
Temperature compensation
Greater tolerance to RF/electronic interference provided
International power supply
Replaceable double junction pH probe
Adjustable display brightness
Non-volatile memory

Probe Tips
All probes are interchangeable between all Bluelab products
All probes carry a 6 month warranty
Proper hydration of ph probes is vital to maintain wick
All pH probes eventually need to be replacedthey can only house so much reference solution
KCl storage solution is required for optimum probe maintenance
RO water will reduce probe life

9. Hanna Combo pH/EC/TDS/C/PPM Tester HI98129

Feature

Automatic calibration at one or two points with two sets of memorized buffer values for ease of use
Replaceable electrodes to prolong life of meter
Automatic temperature compensation (ATC) eliminates need for extra calculations
Waterproof and floats in water
Automatic shut-off to extend battery life

Description

The Hanna Instruments HI 98129 is a multi-parameter tester that measures pH, electro-conductivity (EC), total dissolved solids (TDS), and temperature, and features automatic temperature compensation (ATC), an LCD screen, automatic shut-off, and a waterproof body that floats in water. The tester automatically compensates for the effects of temperature when taking pH and EC/TDS readings, so additional measurements and manual temperature entries are unnecessary.

The HI 98129 meter has a replaceable pH electrode with an extendable cloth junction, and an EC/TDS graphite electrode that is resistant to salts and other corrosives. These features extend the life of the meter by allowing for replacement of the electrodes. Calibration is automatic at one or two points, with two sets of memorized buffer values (pH 4.01/7.01/10.01 or 4.01/6.86/9.18). The EC/TDS conversion factor and temperature compensation coefficient (&Beta) is user-selectable.

The tester functions in temperatures of 0.0 to 60.0 degrees C/32.0 to 140.0 degrees F (+ or - 0.5 degrees C/1 degree F), and has a range of pH 0.0 to 14.0 (+ or - 0.05 pH). EC range is 0 to 3999 uS/cm, TDS range is 0 to 2000 ppm (+ or - 2% F.S), with respective resolutions 1 uS/cm and 1 ppm. At 3.5 ounces and 8.3 x 2.7 x 1.3 inches (H x W x D), the HI 98129 is sized for taking measurements in the field. (H is height, the vertical distance from lowest to highest point; W is width, the horizontal distance from left to right; D is depth, the horizontal distance from front to back.)

pH testers measure the acidity or alkalinity of a substance and are commonly used by researchers, manufacturers, and hobbyists.

Hanna Instruments manufactures analytical instrumentation and supplies, including pH meters, electrodes, chemical reagents, and buffer solutions. The company, founded in 1978 and headquartered in Woonsocket, RI, meets International Organization for Standardization (ISO) 9001 standards.

Whats in the Box?

  • HI 98129 meter
  • Protective cap
  • Electrode removal tool
  • Four 1.5V batteries
  • Instructions

10. Pancellent Water Quality Test Meter TDS PH 2 in 1 Set 0-9990 PPM Measurement Range 1 PPM Resolution 2% Readout Accuracy (Yellow)

Feature

[ Convenience Use ] 5 Seconds know water quality, Accuracy, Faster. This set Combo of TDS PH. Also it have Best Price, Trustable Quality, all make it be your choose of water quality Test.
[ How Accuracy? ] PH resolution is 0.01pH,accuracy 0.01pH.TDS:0~9990 ppm, Accuracy:2%.This's same as big brand resolution in Amazon, but Pancellent tester only need half price of them.
[ Lasted Model ] PH pen have AUTO CALIBRATION function, not need any kind of screwdrivers to calibrate the pH pen tester.TDS pen have Lock & auto shut off function.
[ Pocket Portable ] Small size but Suitable for testing pH balance of drinking water, pool, aquarium, RO system, Spa, or hydroponics.
[ Money Back Guarantee ] Pancellent (Plan of excellent) to provide 30 days Money Back Guarantee and 120 days Replacement Service.

Description

Little Money to Know Water Quality
The Pancellent TDS PH Meter set is a professional level water test meter.
Application: pure water production and drinking, tap water, well water, sea water,
fish tank water, swimming pool water, amniotic fluid early break, soil, aquaculture, food processing, saliva,
enzyme, chemical experiment, ionized water, PH value of human urine and so on.

PH Meter Specifications:
Measure Range : 0.00 - 14.00 pH
Resolution : 0.01 pH
Accuracy : 0.01 pH
Automatic Temperature Compensation : 0 - 60 / 32 - 140
Calibration : Two Points Automatic Calibration Button
Button battery: 2 x 1.5V LR44(keep using more than 500 hours)
Dimension:155mm*31mm*18mm
Weight:50g

TDS Meter Specifications:
Lock function - makes it easy to read and record, press HOLD button then remove from test solution.
5 minute Auto Shut Off feature, so battery won't run down.
Measurement Range: TDS: 0 - 9990 ppm (parts per million)
Accuracy: 2%
Automatic temperature compensation: can automatically change the value of the value of 25 .
Working temperature: 0 ~ 50
Ambient relative humidity: <85%
Net weight: 28g
Size: 142 x 23 x 13 mm
Tips:TDS = Total Dissolved Solids, which is any salt, metal or mineral in the water.

Package Includes:
1 x PH Meter
1 x TDS Meter
2 x Calibration packets
2 x User's manual

About Pancellent:
Pancellent was a registered brand in United States and European Union. It mean plan of excellent.
We are doing our best to providing each customer with the highest standard of customer service.
All our product have 30 days Money Back Guarantee and 120 days Replacement Service.

Conclusion

By our suggestions above, we hope that you can found the best ppm ph meter for you. Please don't forget to share your experience by comment in this post. Thank you!