Water pH Meters

GAO’s water pH meters are devices that measure the acidity or basicity of water. pH is a measure of the concentration of hydrogen ions in a solution and ranges from 0 (most acidic) to 14 (most basic). A pH meter consists of a probe that is inserted into the water sample, and a meter that displays the pH reading. The probe of a pH meter contains a glass electrode that is sensitive to the concentration of hydrogen ions in the water. The electrode generates a voltage that is proportional to the pH of the water, which is then read by the meter and displayed as a numerical value.

GAO’s water pH meters are composed of probe, reference electrode, pH meter display, calibration solution, temperature sensor, and battery.

The other common names of pH meters are pH testers, pH probes, pH sensors, acid-base meters, hydrogen ion concentration meters, alkalinity meters, acidic solution meters, alkaline solution testers, pH indicators, pH analyzers, pH measurement devices, acidity/alkalinity monitors, pH measurement instruments, pH monitors and pH gauges. 

GAO Tek has been focused on servicing the North American markets and has earned praise from many of its customers in the U.S., Canada, and Mexico.

Showing all 125 results

GAOTek PH Meter with 5 Points Calibration (High Accuracy)

SKU: GTOOY400ZE
This PH Meter with 5 Points Calibration (High Accuracy) is designed in the accuracy of 0.002 pH and supports relative and absolute millivolts measurement modes.

GAOTek Digital PH Sensor

SKU: AOTek-PHM-288
This Digital pH sensor has a pH range 0 pH to 14 pH, processing pressure range of 15 PSI to 246 PSI and temperature compensation range of 32 °F to 275 °F.

GAOTek Portable Ph Meter

SKU: GAOTek-PHM-287
GAOTek ph meter with backlight display and operation keyboard, comprehensive functions, simple operation, simple interface.

GAOTek Handheld PH Meters

SKU: GAOTek-PHM-286
GAOTek PH meter, also been called as Digital PH meter or PH Tester, is the device that do PH measurement for liquid.

GAOTek Pen Portable PH Meter

SKU: GAOTek-PHM-285
This Pen Portable pH Meter has a pH range -0.000 pH to 14.000 pH, temperature range of 32 °F to 140 °F and automatic calibration.

GAOTek Ph Water Meter

SKU: GAOTek-PHM-284
GAOTek Ph water meter steel ruler water level gauge provides the most accurate way to measure water levels, used to measure the water level in wells, boreholes, and water pipes, particularly suitable for the observation of groundwater level in hydropower projects and artificial inspection of dam body infiltration line.

GAOTek Handheld Water Multimeter PH

SKU: GAOTek-PHM-283
GAOTek handheld multimeter pH measures six key water treatment parameters simultaneously: pH, conductivity, PTSA, Free Chlorine, ORP, and Temperature.

GAOTek Portable Multi-meter Ph Meter

SKU: GAOTek-PHM-282
GAOTek Ph Power Meter is a single-phase handheld electronic meter test unit in accuracy class 0.1 or 0.2, used for testing single phase electricity meters error on site.

GAOTek Ph Power Meter

SKU: GAOTek-PHM-281
GAOTek Ph Power Meter is a single-phase handheld electronic meter test unit in accuracy class 0.1 or 0.2, used for testing single phase electricity meters error on site.

GAOTek PH Detector

SKU: GAOTek-PHM-200
This PH detector has temperature range of 14 °F to 275 °F, pH range of -2 pH to 16 pH, and 220 VAC power supply.

GAOTek Portable Digital PH Meter

SKU: GAOTek-PHM-199
This Portable digital pH meter has temperature range of 32 °F to 221 °F, pH range of -2.00 pH to 20.00 pH and 1.5 V AA batteries.

GAOTek Portable PH Meter

SKU: GAOTek-PHM-198
GAOTek Portable PH meter is a specialized water quality detector for aquaculture, with multiple detection items to help you better understand the aquaculture environment.

GAOTek Portable Ph Meter

SKU: GAOTek-PHM-197
GAOTek Portable Ph Meter has a small size and reliability quality to work on most conditions.

GAOTek Ph Electrode Tester

SKU: GAOTek-PHM-196
GAOTek ph electrode tester is mainly used to measure the redox potential of fresh or moist soil, water (medium) redox potential, pH, temperature, and other data in situ.

GAOTek Portable PH Meter

SKU: GAOTek-PHM-195
This portable PH meter has temperature range of 23 °F to 266 °F, TDS range of 0.000 ppm to 1000 ppm and 24V power supply.

GAOTek Ph Meter

SKU: GAOTek-PHM-194
GAOTek Ph meter is more economical and environmentally friendly than traditional chemical method. Small, easy to install, and can be used for continuous online water quality monitoring.

GAOTek Portable pH Multi-Meter

SKU: GAOTek-PHM-193
GAOTek Portable pH multi-Meter a robust and intuitive range of portable meters, instilling confidence in reporting and managing your results.

GAOTek Water Quality Instrument Portable Ph Meter

SKU: GAOTek-PHM-192
GAOTek Water Quality Instrument Portable Ph meter comes with a range of standard sensors including pH, dissolved oxygen, conductivity, temperature, turbidity, depth, ORP, Chlorophyll, Blue-green Algae, NH4+, K+, TSS, Salinity etc.

GAOTek Portable Bench Top pH Meter

SKU: GAOTek-PHM-191
This portable bench top pH meter has temperature range of 32 °F to 140 °F, pH measure range of 0 pH to 14 pH, and 12V power supply.

GAOTek Turbidity Measurement Ph Meter

This Turbidity Measurement Ph Meter has a temperature range of 32 °F to 140 °F, a measurement range of 0 mg/L to 10000 mg/L, and a power supply of 12 V.

GAOTek Agricultural ph Meter

This Agricultural Ph Meter has a temperature range of 41 °F to 113 °F, a pH range of 3.0 pH to 14.0 pH, and a rechargeable battery.

GAOTek Handheld Digital pH Meter

This Handheld Digital pH meter has a temperature range of 14 °F to 104 °F, a frequency range of 40 Hz and a 9.6 V rechargeable battery.

GAOTek Dissolved Oxygen ph Meter

GAOTek The handheld device can be used for monitoring of dissolved oxygen, temperature, and PH in water, and can meet the requirements of portable accurate water quality measurement.

GAOTek Automatic Calibration pH Meter

This Automatic Calibration pH Meter has a temperature range of 23 ºF to 230 ºF, a pH range of -2.00 pH to 20.00 pH and an AC adapter.

GAOTek Portable PH Tester Meter

SKU: GAOTek-PHM-175
GAOTek Portable PH Tester Meter is one of the intelligent online chemical analysis instruments, which can continuously monitor data and realize remote monitoring and recording through transmission and output connection recorder.

GAOTek Portable pH Meter Kit

SKU: GAOTek-PHM-176
This Portable pH Meter Kit has a temperature range of 32 °F to 212 °F, a pH range of -2.00 pH to 19.99 pH, and AA batteries.

GAOTek Portable Soil PH Meter

SKU: GAOTek-PHM-177
This Portable Soil PH Meter has a temperature range of 41 °F to 113 °, a pH range of 0 PH to 14 PH, and response time of less than 10 s.

GAOTek Portable Conductivity pH Meter

SKU: GAOTek-PHM-178
This Conductivity Ph Meter has a temperature range of 32 °F to 212 °F, a pH range of 0 pH to 14 pH, and a 1.5 V battery

GAOTek Portable Blue-green Algae Meter Handheld pH Meter

This Blue-Green Algae pH Meter has a temperature range of 32 °F to 140 °F, pH range of 0 pH to 14 pH, and power supply of 12 V.

GAOTek Portable PH/Ion Tester

SKU: GAOTek-OENVT-119
This portable pH/Ion tester has a lithium battery, an AC adapter, a 100-240V AC input, a DC 5V output, and a temperature range of 14–275°F.

GAOTek Portable Chlorine and Ph Tester

SKU: GAOTek-OENVT-120
This portable chlorine and PH tester has an AC 220 V working voltage, a 0 to 20 mg/L measurement range, ±1% accuracy, 0.001 mg/L resolution.

GAOTek High Precision pH Meters

SKU: GAOTek-PHM-188
This High Precision pH Meters has temperature range of 23 °F to 221 °F, pH range of -2 pH to 19.999 pH and 5 V lithium batteries.

GAOTek pH Meter for Semi-Solid Media

SKU: GAOTek-PHM-187
GAOTek pH meter can be used virtually anywhere.

GAOTek Portable High Accuracy pH Meter

SKU: GAOTek-PHM-186
This Portable High Accuracy pH Meter has temperature range of 23 °F to 221 °F, pH range of -2.00 pH to 20.0 pH and 1.5 V AA batteries.

GAOTek Salinity Resistivity PH Meter

SKU: GAOTek-PHM-185
This Salinity Resistivity pH Meter has temperature range of 23 °F to 221 °F, pH range of -2.00 pH to 20.0 pH and 400 mA power adapter.

GAOTek Portable Digital pH Meters

SKU: GAOTek-PHM-184
This Portable Digital pH Meters has temperature range of 32 °F to 221 °F, pH range of -2.00 pH to 20.0 pH and 3 1.5 V “AA” batteries.

GAOTek Portable Digital pH meter

SKU: GAOTek-PHM-183
GAOTek pH meter has a small size and reliability quality to work on most conditions.

GAOTek Ph Meter Tester

SKU: GAOTek-PHM-182
Technical Specification Parameters Range Resolution Accuracy PH/PX -2.00 to 20.00 0.01 ±0.01 pH ± 1 bit ORP ±1999.9 mV 0.1

GAOTek Portable pH Meter

SKU: GAOTek-PHM-181
GAOTek portable pH meter is a digital display PH meter, with LCD digital display, which can display PH and temperature values simultaneously.

GAOTek Portable pH Meter

SKU: GAOTek-PHM-180
This Portable pH Meter has temperature range of 23 ºF to 230 ºF, pH range of -2.00 pH to 20.0 pH and 5 V lithium battery power supply.

GAOTek Soil Nutrient pH meter

SKU: GAOTek-PHM-179
This Soil Nutrient pH Meter has temperature range of -58 °F to 212 °F, pH range of 0 pH to 14 pH and 7.4 V lithium battery power supply.

GAOTek Digital Portable pH/ORP Meter

SKU: GAOTEK-PHM-157
GAOTek portable pH meter is widely used in pH measurement in environmental protection, education, scientific research, the pharmaceutical and chemical industries, the water industry, food safety inspection, and other fields.

GAOTek Blue with White Ozone Dissolved PH Tester

SKU: GAOTEK-PHM-158
This ozone-dissolved pH tester has a dual CL/O3 range of 0 to 20mg/L, a temperature of 32 to 140 °F, an LCD, a reliable 32-bit processor, and is IP65

GAOTek pH Sensors

SKU: GAOTEK-PHM-159
This pH sensor has OEM, ODM, and OBM cable and KCl tube lengths of 787.4 in and is suitable for general-purpose use.

GAOTek Portable Blue-green Algae Meter Handheld pH Meter

SKU: GAOTek-PHM-160
This Blue-Green Algae pH Meter has a temperature range of 32 °F to 140 °F, pH range of 0 pH to 14 pH, and power supply of 12 V.

GAOTek Turbidity Measurement Ph Meter

SKU: GAOTek-PHM-140
This Turbidity Measurement Ph Meter has a temperature range of 32 °F to 140 °F, a measurement range of 0 mg/L to 10000 mg/L, and a power supply of 12 V.

GAOTek Agricultural ph Meter

SKU: GAOTek-PHM-171
This Agricultural Ph Meter has a temperature range of 41 °F to 113 °F, a pH range of 3.0 pH to 14.0 pH, and a rechargeable battery.

GAOTek Handheld Digital pH Meter

SKU: GAOTek-PHM-172
This Handheld Digital pH meter has a temperature range of 14 °F to 104 °F, a frequency range of 40 Hz and a 9.6 V rechargeable battery.

GAOTek Dissolved Oxygen ph Meter

SKU: GAOTek-PHM-173
GAOTek The handheld device can be used for monitoring of dissolved oxygen, temperature, and PH in water, and can meet the requirements of portable accurate water quality measurement.

GAOTek Automatic Calibration pH Meter

SKU: GAOTek-PHM-174
This Automatic Calibration pH Meter has a temperature range of 23 ºF to 230 ºF, a pH range of -2.00 pH to 20.00 pH and an AC adapter.

GAOTek Portable Handheld Water pH Meter

SKU: GAOTEK-PHM-156
This water pH meter has turbidity ranges of 0 to 4000 NTU, an accuracy of 5% FS, a temperature range of 32 to 104 °F, and a response time of 10s.

GAOTek Portable Auto Intelligent Multiparameter

SKU: GAOTEK-PHM-151
This auto-intelligent multiparameter has a touch screen, a USB interface, pH ranging from -2 pH to 20 pH, temperature ranging from 23 °F to 260°F.

GAOTek Multi Parameter Water Quality PH Meters

SKU: GAOTEK-PHM-152
This multi-parameter water quality PH meter measures pH and temperature in -2.00 pH to 16.00 pH range, and 23 °F to 212°F range respectively.

GAOTek Portable pH Meter

SKU: GAOTEK-PHM-153
GAOTek  portable ph meter is a perfect combination of advanced electronic technology, sensor technology, and software design.

GAOTek Portable pH Meter

SKU: GAOTEK-PHM-154
This portable pH meter has a pH measuring range of -2.00 to 19.99, with a resolution of 0.1 pH/0.01 pH and ±0.01 accuracy.

GAOTek Soil Moisture and Salinity pH Tester

SKU: GAOTEK-PHM-155
This soil moisture and salinity pH tester has a measurement range of 0–100%, ±0.01% sensitivity, lithium battery or AC-powered, and USB communication.

GAOTek Portable Handheld pH Meter

SKU: GAOTEK-PHM-150
GAOTek portable pH meter is used for testing water quality.

GAOTek Hardness Testers Automatic Turret Digital

SKU: GAOTek-HDT-106
GAOTek Hardness Testers features hardness testing equipment designed based on the Vickers hardness testing method, which involves using a diamond indent to create an impression on the material surface.

GAOTek Benchtop pH Meter

SKU: GAOTek-PHM-149
This Benchtop pH Meter has a pH ranging from -1.00 pH to 15.00 pH, a temperature compensation range of 32 °F to 212 °F, and an LCD.

GAOTek Portable Ph Meter for Food and Dairy Products

SKU: GAOTek-PHM-148
GAOTek Portable pH Meter is an outstanding combination of the advanced digital processing technology, software design, and electrochemical sensor technology, specially designed for a pH measurement of food and dairy product (meat, cheese, dairy products, fruit, etc.), canning, and other semi-solids (such as soil).

GAOTek Portable Acidity Ph Meter

SKU: GAOTek-PHM-147
GAOTek portable acidity pH meter has a waterproof pH, ORP and temperature meter. The housing of this tester has been completely sealed against humidity and is designed to float.

GAOTek Portable pH Meter For Dairy Products

SKU: GAOTek-PHM-146
This Portable pH Meter for Dairy Products has a pH ranging from -2.00 pH to 19.99 pH, a temperature range of 32.0 °F to 176.0 °F, and an backlit LCD.

GAOTek High Precision Laboratory Desktop pH Meter

SKU: GAOTek-PHM-145
This Laboratory Desktop pH Meter has a pH ranging from 0.00 pH to 14.00 pH, a temperature range of 32.0 °F to 212.0 °F, and a 1.11 lb (504 g) weight.

GAOTek Professional Portable pH Meter

SKU: GAOTek-PHM-144
This Professional Portable pH Meter has a pH ranging from -2 pH to 20 pH, a temperature range of 32.0 °F to 221.0 °F, and an auto power-off feature.

GAOTek Digital Portable Type Water Quality Ph Meter Sensor

SKU: GAOTek-PHM-143
This Digital Portable Type Water Quality Ph Meter Sensor has a pH ranging from -2 pH to 20.000 pH, and a temperature range of 23 °F to 266 °F.

GAOTek Water Quality Analyzer PH Meter Digital Portable pH

SKU: GAOTek-PHM-142
This Water Quality Analyzer PH Meter Digital Portable pH has a pH ranging from -2 pH to 19.99 pH, and a temperature compensation range of 32 °F to 212 °F.

GAOTek Multi-Parameter Analyzer pH Meter

SKU: GAOTek-PHM-141
This Multi-Parameter Analyzer pH Meter has a pH ranging from -2.000 pH to 20.000 pH, a temperature range of 14 ºF to 275 ºF, and an LCD touchscreen.

GAOTek High Precision Digital ORP Meter

SKU: GAOTek-PHM-165
This Tester PH meter has temperature range of 32 ºF to 212 ºF, resolution range of 0.0 ppm to 20.00 ppt and 1.5 V AAA battery.

GAOTek Portable Soil Tester pH

SKU: GAOTek-PHM-170
GAOTek soil tester pH adopts the latest digital integrated circuit technology and international detection technology to design a new intelligent handheld detector.

GAOTek Marine Operations pH Meter

SKU: GAOTek-PHM-169
This Marine Operations pH Meter has a temperature range of 32 °F to 140 °F, a 12 V DC power supply, and a stainless-steel material.

GAOTek Instruments Portable pH

SKU: GAOTek-PHM-168
This Instruments portable pH has temperature range of 32 °F to 212 °F, pH range of -2 pH to 19.99 pH, and 1.5V AA batteries.

GAOTek Calcium Hydroxide Electrode PH Meter

SKU: GAOTek-PHM-167
This Hydroxide Electrode PH Meter has temperature range of 32 °F to 212 °F, pH range of 0 pH to 14 pH, and orp sensor.

GAOTek Dissolved Oxygen pH DO Meter

SKU: GAOTek-PHM-166
This Oxygen pH DO Meter has temperature range of 32 °F to 212 °F, response time less than 30 s and 12V AAA battery.

GAOTek Portable Pocket pH Meter

SKU: GAOTek-PHM-164
This Pocket pH meter has temperature range of 32 °F to 104 °F, wavelength of 525 nm and AAA battery.

GAOTek Tester PH meter

SKU: GAOTek-PHM-163
This Tester PH meter has temperature range of 32 ºF to 212 ºF, resolution range of 0.0 ppm to 20.00 ppt and 1.5 V AAA battery.

GAOTek Water Quality pH Meter

SKU: GAOTek-PHM-162
This Water Quality pH Meter has a wavelength range of 420 nm to 700 nm and optical stability is less than 0.002 A within 20 min.

GAOTek Laboratory Portable Ph Meter

SKU: GAOTek-PHM-161
This Barcode Scanner Assistant has an operating temperature of -4 °F to 122 °F (-20 °C to 50 °C), 3 GB RAM, 32 GB ROM, and 13.55 MHz frequency.

GAOTek Portable Ph Meter Tester

SKU: GAOTek-PHM-132
GAOTek Portable Ph Meter Tester adopts a new generation of four-electrode/six-electrode technology, with wide measurement range, automatic switching measurement range, built-in temperature sensor and real-time temperature compensation.

GAOTek Portable pH Meter

SKU: GAOTek-PHM-139
This Portable PH Meter has the pH ranging from 0.00 pH to 14.00 pH, a temperature range of 32 °F to 212 °F, and Powered by AAA Alkaline batteries.

GAOTek Portable PH Meter

SKU: GAOTek-PHM-137
GAOTek Portable pH meter also been called as Water Testing Device or Water Quality Testing Device, it’s the device that measure the value of pH, Cond.

GAOTek Portable PH meter

SKU: GAOTek-PHM-134
GAOTek portable pH meter has more advantages in various fields such as wastewater, aquaculture, and fermentation, etc.

GAOTek Portable PH Meter

SKU: GAOTek-PHM-133
This Portable PH Meter has the pH ranging from 0.00 pH to 14.00 pH, a temperature range of 23 °F to 221 °F, an LCD, and a IP65 protection.

GAOTek PH Meter Instrument

GAOTek pH meter instrument. The pH/ORP sensor uses a composite electrode with a combination of a glass indicator electrode and a reference electrode to measure the pH/ORP value of the water, with stable data and reliable performance.

GAOTek PH Meter Instrument

SKU: GAOTek-PHM-131
GAOTek pH meter instrument. The pH/ORP sensor uses a composite electrode with a combination of a glass indicator electrode and a reference electrode to measure the pH/ORP value of the water, with stable data and reliable performance.

GAOTek High Accuracy pH Meter

SKU: GAOTek-PHM-138
This High Accuracy pH Meter has the dissolved oxygen range of 0.00-2000 mg/L (or ppm), an auto-temperature compensation range of 32 °F to 104 °F.

GAOTek Lab Portable pH Meter

SKU: GAOTek-PHM-136
This Lab Portable pH Meter has the pH ranging from -2 pH to 20 pH, a temperature range of 32 °F to 221 °F (0 °C to 105 °C), and an auto power-off.

GAOTek Handheld pH Meter

SKU: GAOTek-PHM-135
GAOTek handheld pH meter adopts a large LCD display that displays values in real-time. Up to 4 water quality sensors can be connected to measure various elements.

GAOTek Cheese & Milk PH Meter

SKU: GAOTek-PHM-119
GAOTek Cheese & Milk PH Meter is a specialized device for accurately measuring the acidity levels in cheese and milk products.

GAOTek 3 in 1 Water Quality pH Meter

SKU: GAOTek-PHM-120
GAOTek’s 3 in 1 Water Quality pH Meter is a comprehensive device that allows users to test the quality of drinkable water.

GAOTek Mini Aquarium pH Meter

SKU: GAOTek-PHM-118
GAOTek Aquarium Water pH Meter is a specialized device for maintaining optimal water quality in saltwater pools.

GAOTek Food Processing pH Meter

SKU: GAOTek-PHM-117
GAOTek’s Food Processing pH Meter is a versatile device used for measuring pH levels in food processing. With its portable design, it offers convenience and accuracy in determining the acidity or alkalinity of different food products.

GAOTek Waterproof Digital PH Meter Pen

SKU: GAOTek-PHM-116
GAOTek’s Waterproof Digital PH meter pen is a portable and accurate tool for measuring pH levels in liquids. It has a wide measurement range of 0-14 pH, with a resolution of 0.01 pH.

GAOTek Real Time Monitoring Soil PH Meter

SKU: GAOTek-PHM-115
GAOTek’s Real Time Monitoring Soil pH Meter, pH sensor, offers a reliable solution for measuring pH values in soil.

GAOTek PH Value Sensor

SKU: GAOTek-PHM-114
GAOTek PH Value Sensor Module PH Meter for Water Tester is a cutting-edge IoT pH analyzer equipped with RS-485 and Wi-Fi connectivity for remote monitoring and in-situ measurements using a mobile phone, eliminating the need for a separate meter or app.

GAOTek Digital PH And Acidity Meter With Soil PH Detection

SKU: GAOTek-PHM-113
GAOTek’s Digital PH and Acidity Meter with Soil PH Detection is a versatile device designed for accurate pH measurement, specifically for soil pH detection.

GAOTek High Accuracy PH Meters Portable

SKU: GAOTek-PHM-112
GAOTek’s High Accuracy PH Meters Portable is a versatile and reliable pH measurement instrument that excels in water quality monitoring.

GAOTek Handheld Digital Water PH Meter

SKU: GAOTek-PHM-111
GAOTek Handheld Digital Water pH Meter with Temperature Meter, it is a versatile and accurate portable device designed to measure pH and ORP (Oxygen Reduction Potential) levels as well as temperature in water.

GAOTek Digital pH Meter (Touch Screen)

SKU: GAOTek-PHM-101
GAOTEK pH digital conductivity meter is a portable and accurate instrument used for measuring the electrical conductivity of liquids.

GAOTek Handheld pH meter with multi-reading feature

SKU: GAOTek-PHM-110
GAOTek Handheld pH Meter is a portable pH meter designed for laboratory use.

GAOTek Water pH Acidity Meter

SKU: GAOTek-PHM-121
GAOTek manual disc polarimeter is an optical instrument used to measure the optical rotation of a substance.

GAOTek pH Sensor for Water Laboratory

SKU: GAOTek-PHM-108
GAOTek pH Sensor is a reliable and accurate pH meter designed for water laboratory applications.

GAOTek Portable digital pH Meter for Food and Milk

SKU: GAOTek-PHM-107
GAOTek pH Meter for Food and Milk is a digital pH meter specifically designed for the accurate measurement of pH levels in food and milk products.

GAOTek Portable pH Meter for Food

SKU: GAOTek-PHM-106
GAOTek Portable pH Meter Food is a compact and portable pH meter specially designed for food-related applications.

GAOTek PH ORP Temp Portable Digital PH Meter

SKU: GAOTek-PHM-105
GAOTek pH ORP Temp Portable Meter is a laboratory-grade digital pH meter designed for accurate and reliable pH, ORP (Oxidation-Reduction Potential), and temperature measurements.

GAOTek pH ORP Meter Analyzer and pH Controller

SKU: GAOTek-PHM-104
GAOTek pH ORP Meter Analyzer and pH Controller with Dosing in Wastewater is an advanced instrument designed for comprehensive monitoring and control of pH and ORP (Oxidation-Reduction Potential) levels in wastewater treatment processes.

GAOTek pH Sensor Electrode

SKU: GAOTek-PHM-103
GAOTek pH Sensor Electrode for Water Treatment is a specialized electrode designed for accurate pH measurements in water treatment applications.

GAOTek Portable PH Digital Alcalinity Tester

SKU: GAOTek-PHM-102
GAOTek Portable pH Digital Alkalinity Tester is a compact and reliable instrument designed for measuring pH and alkalinity levels in liquids.

PH Meter with ORP (0.2% Accuracy and 0-14 PH Range)

SKU: GT00ZJ00ZW
Key Features Specifications Key Features High quality and economy Widely measuring range Widely used for routine use in laboratories, production

PH Meter with mV (3 Points Calibration and Self-Diagnostic)

SKU: GT00ZA00ZU
Key Features Specifications Key Features Large LCD display Microprocessor-based chip and parts apparatus are jointed with SMT technology offers high

PH Meter with ORP and Temperature (Low Error Rate)

SKU: GT00ZJ00ZX
Key Features Specifications Key Features Double row nixie tubes display PH value/mV value and temperature respectively. Computer based: It adopts

PH Meter with High Precision (3000 Data Store and Single Board)

SKU: GT00Y400ZY
Key Features Specifications Key Features Computer based: It adopts CPU high-performance chip, high-precision AD conversion technology and SMTtechnology to complete

PH and ORP Controller with High Accuracy (Light Weight)

SKU: GT00XB00ZZ
Key Features Specifications Key Features Used for applications such as water treatment and monitoring, galvanic-decontamination, chemical processing, Wastewater control and

PH Meter with Conductivity and TDS (Multimodes Power)

SKU: GT00YY00ZT
Key Features Specifications Key Features Simple, easy-to-use portable pH meter with Large LCD display 1-5 points calibration with auto-buffer recognition

PH Meter with mV and Conductivity and Temp (Wide Measuring Range)

SKU: GT00Y400ZA
Key Features Specifications Key Features High resolution 7 -inch color touch – controlled LCD screen, simple and convenient in use

PH Meter with mV and Temperature (Two Point Auto Calibration)

SKU: GT00Y400ZB
This PH Meter with mV and Temperature (Two Point Auto Calibration) is designed to measure the concentration of solution’s mV and pH value in the range from 0 ~ 14.00 pH.

GAOTek PH Meter with mV and Temperature (Accurate, Auto Calibration)

SKU: GT00Y400ZC
This PH Meter with mV and Temperature (Accurate, Auto Calibration) is designed to measure the concentration of solution’s mV and pH value and be calibrated with 2 points auto calibration.

PH Meter with ORP and Conductivity Range (Data Storage, Accurate)

SKU: GT00Y400ZD
Key Features Specifications   Key Features Optional 5 kinds of PH buffer solution can make 1-3 points automatic calibration Can

GAOTek PH Controller with 3 Points Calibration (Reset Function)

SKU: GT00Y400ZN
This PH Controller with 3 Points Calibration (Reset Function) is designed for monitoring the pH of liquids in chemical, pharmaceutical, environmental protection and food industries.

GAOTek PH Meter with 2 Points Calibration (Electrode Slope)

SKU: GT00Y400ZF
This PH Meter with 2 Points Calibration (Electrode Slope) is designed to measure the pH and millivolt of samples with the accuracy of 0.01 pH.

GAOTek PH Meter with mV/Temp ( Temp. Compensation, 3 Point Calib)

SKU: GT00Y400ZJ
This PH Meter with mV/Temp (Temp. Compensation, 3 Point Calib) is designed using 3 point calibration for high accuracy measurements and supports automatic temperature compensation over the complete pH range from -1.00 pH ~ 15.00 pH.

PH Meter with mV (2 Point Calibration, High Accuracy)

SKU: GT00Y400ZM
This PH Meter with mV (2 Point Calibration, High Accuracy) is designed using 2 point calibration mode and has manual temperature compensation function to enhance the measurement accuracy of upto 0.05 pH.

PH Meter with mV/Temp (Quality Controls, 2 Point Calibration)

SKU: GT00Y400ZK
This PH Meter with mV/Temp (Quality Controls, 2 Point Calibration) is designed using 2 point calibration for high accuracy measurements and can be used for daily testing and quality controls.

PH Meter with Temperature (High Resolution, Accuracy)

SKU: GT00Y400ZP
This pH Meter with Temperature (High Resolution, Accuracy) is designed to measure the solution’s PH and temperature value with manual and automatic temperature compensation.

Multifunctional PH Meter (mV, CF, TDS, Temp, Conductivity)

SKU: GT00Y400ZQ
This Multifunctional PH Meter (mV, CF, TDS, Temp, and Conductivity) has multifunctional detection capability and can measure mV, CF, TDS, Temp, and Conductivity with replaceable electrode.

PH Meter with ION (500 Data Store and Self-diagnostic)

SKU: GT00ZK00ZX
GAOTek PH Meter with ION detects PH and ION with high accuracy and stores 500 history data.

GAO Tek’s water pH meters have the following functions:

  • Measure pH: The primary function of GAO water pH meters is to measure the pH of water. pH is a measure of the concentration of hydrogen ions in water, which determines whether the water is acidic or alkaline. Our pH meters use a specialized electrode to measure the pH of water, which is typically displayed on a digital screen or readout.
  • Determine water quality: pH is an important indicator of water quality, as it can affect the solubility and toxicity of various chemicals and metals in water. By measuring the pH of water with GAO water pH meters, we can help determine whether water is suitable for various uses, such as drinking, irrigation, or industrial processes.
  • Monitor water treatment: Our water pH meters are used to monitor the pH of water during water treatment processes, such as chlorination, coagulation, and sedimentation. By monitoring the pH of water, operators can ensure that the treatment process is effective and that the water is safe for its intended use.
  • Maintain equipment: pH can affect the performance and lifespan of various equipment and machinery that use water. By monitoring the pH of water with our water pH meters, operators can prevent corrosion, scaling, and other issues that can damage equipment and decrease efficiency.

GAO’s water pH meters are rugged, portable, versatile and precision measurement instruments. They comply with applicable industry standards such as ISO 9001, ASTM E70, good laboratory practice/good manufacturing practice (GLP/GMP), food and drug administration (FDA) regulations, and CE certification.

Our water pH meters help our clients in complying with relevant U.S. government regulations such as:

  • Clean Water Act
  • Safe Drinking Water Act
  • Occupational Safety and Health Administration (OSHA) regulations
  • Environmental Protection Agency (EPA) regulations
  • Food and Drug Administration (FDA) regulations

Our water pH meters help our clients in complying with relevant Canadian government regulations such as:

  • Canadian Environmental Protection Act
  • Canadian Drinking Water Guidelines
  • Canadian Environmental Quality Guidelines
  • Occupational Health and Safety Regulations

GAO’s water pH meters have the following applications:

  • Water treatment: GAO pH meters are used to monitor the pH levels in water treatment plants to ensure that the water is safe for consumption.
  • Aquaculture: Our pH meters are used to monitor the pH levels in fish tanks, ponds, and other aquatic systems to ensure that the water conditions are suitable for fish and other aquatic organisms.
  • Agriculture: Our pH meters are used to measure the pH levels of soil and irrigation water in agriculture to optimize crop growth.
  • Environmental monitoring: GAO pH meters are used to monitor the pH levels of natural bodies of water, such as lakes, rivers, and oceans, to detect and prevent water pollution.2
  • Scientific research: Our pH meters are used in scientific research to measure the pH of various solutions in chemistry, biochemistry, and other scientific fields.
  • Food and beverage industry: Our pH meters are used to monitor the pH levels in food and beverage production processes to ensure product quality and safety.

Our water pH meters can be shipped overnight within the continental U.S. and Canada, and can be shipped globally.