Water Ion Meters

GAO’s water ion meters are devices that are used to measure the concentration of ions in water. These meters are used in water treatment plants, laboratories, and in the field to ensure that water is safe for consumption and meets the required standards. Our water ion meters work by using an ion-selective electrode, which is a type of sensor that detects the concentration of a particular ion in water. The electrode is placed in the water sample and measures the voltage difference between the electrode and a reference electrode, which is used to calculate the concentration of the ion.

GAO’s water ion meters are composed of ion-selective electrode, reference electrode, meter display, calibration solutions, and temperature probe.

The alternative names of ion meters include ion-selective electrodes, ion-selective sensors, ion-selective membrane electrodes, ion concentration meters, ion-specific electrodes, ion concentration analyzers, ion probes, ion detection systems, ionic strength meters, ion-sensitive field-effect transistors (ISFET), ion activity meters, potentiometric ion sensors and pH meters.

Here are GAO Tek’s ION Meters, arranged based on their respective features , including ammoniumbenchtopcalciumchloridehandheldauto-hold functionbacklit lcd displaymulti-modemulti-point calibrationlaboratory & researchmulti-ion measurement multi-parameternitrateoutdoorpotassiumsodiumwater quality and wireless.

4-in-1 Water Quality Pen (pH, ORP, Hydrogen, Temp)- GAOTek

SKU: GAOTek-PIM-565
Portable pen tester measuring pH, ORP, dissolved hydrogen, and temperature with automatic temperature compensation, IP67 waterproofing, LCD display.

Advanced Digital pH/ISE/Ion/mV/Temp Meter with LCD & Data Storage – GAOTek

SKU: GAOTek-SIM-215
High-precision pH/ISE/mV/Temp meter with 5.7" LCD, auto-read, GLP data storage, auto calibration, USB/RS232 connectivity, and IP54 waterproof design.

Advanced Multi-Parameter Water Quality Meter (pH, DO, EC, Turbidity)- GAOTek

SKU: GAOTek-PIM-765
Portable water meter offering real-time measurement of pH, dissolved oxygen, turbidity, conductivity, TDS, temperature; features data logging, IP67 ruggedness, and USB export.

Advanced Portable pH/ORP Meter with Data Logging and Calibration – GAOTek

SKU: GAOTek-IMWA-254
Overview: GAOTek advanced portable pH/ORP meter with data logging and calibration Record accurate and reliable pH, mV, ORP and temperature

Ammonium (NH₄⁺) Combined Ion Selective Electrode – GAOTek

SKU: GAOTek-AIOM-411
Industrial-grade online analyzer for continuous ammonium ion (NH₄⁺) monitoring with ISE probe, RS-485 Modbus, dual 4–20 mA outputs, relay alarms, data logging, and IP65 housing.

Ammonium Ion Selective Electrode Multiparameter Portable Meter – GAOTek

SKU: GAOTek-AION-248
GAOTek high-precision ammonium (NH₄⁺) ion-selective PVC sensor, 0.02–200 ppm, PEI body with gel double-junction, for HI9829 probes.

Benchtop pH ORP Ion Meter for Labs – GAOTek

SKU: GAOTek-NION-764
Accurate benchtop meter measuring pH, ORP, and ion concentrations; features 1–5 point auto-buffer calibration, GLP data logging, USB output, and electrode diagnostics — CE-ready.

Concrete Chloride Ion Penetration & Migration Tester – GAOTek

SKU: GAOTek-NION-101
Advanced concrete chloride migration tester with color 10″ touchscreen, multi-channel testing, vacuum saturation, and precise voltage/current control for durability assessment.

Customizable Industrial Online pH Meter Controller Transmitter- GAOTek

SKU: GAOTek-PIM-715
Industrial online pH meter controller with auto-temperature compensation, 4–20 mA and RS-485 outputs, PC/ABS housing, working range –10–60 °C, storage –20–70 °C, customizable options.

Digital 4-in-1 Water Quality Tester (pH, ORP, EC, TDS)- GAOTek

SKU: GAOTek-PIM-511
Handheld 4-in-1 tester measuring pH, ORP, conductivity (EC), TDS, and temperature; features backlit LCD, auto-calibration, and rugged, portable design.

Digital Ammonia Nitrogen Ion Sensor (NH₄⁺) Model 300NH4C – GAOTek

SKU: GAOTek-BIM-101
High-performance ammonia nitrogen (NH₄⁺) ISE sensor, 0–1000 mg/L range, ±5% FS accuracy, RS-485 Modbus output, polymer body, DC-powered, with customizable OEM options.

Digital Ammonium Nitrogen Ion Sensor (RS-485, ISE) – GAOTek

SKU: GAOTek-AIOM-811
Industrial online ammonium nitrogen sensor using ion-selective electrode, RS-485/Modbus output, automatic temp compensation, high accuracy (±5 % or 0.2 mg/L), IP68 durability and OEM-ready.

GAO Tek Ammonium Ion Sensor

SKU: GAOTek-HIM-242
This Ammonium ion sensor has a consists of a measuring range of 0.1 ppm to 18000 ppm, resolution of 0.001 ppm and accuracy of ± 1 %

Gao Tek Water Quality Detective

SKU: GAOTek-HIM-241
This Water quality detective has sensor input range of 0 mg per L to 100.00 mg per L, accuracy of ± 10 %  and Power 12 V DC to 24 V DC

GAOTek Cyanide Ion Meter

SKU: GAOTek-OIM-204
This Cyanide Ion Meter has a calibration solution 0.001, 0.01, 0.1, 1, 10, 100, 1000, 10000 ppm, calibration due 0 day to 31 days and accuracy ± 0.2 mV.

GAOTek Air Ion Tester Meter

SKU: GAOTek-BIM-231
This Air Ion Tester Meter has air flow rate of 2.3 m/s, an accuracy of ± 20%, 10 ions resolution, and 41 °F to 113 °F, 95% RH operation environment.

GAOTek Ammonia Ion Meter

SKU: GAOTek-LRIM-210
This Ammonia Ion Meter has a pH range of - 2.000 ph to 20.000 ph, temperature range of 41 °F to 266 °F, and 0.1 mv to 0.01 mv resolution.

GAOTek Ammonia Meter Nitrate Measurement

SKU: GAOTek-NIM-218
GAOTek Ammonia Meter Nitrate Measurement uses membrane potential to measure the activity or concentration of ions in the solution.

GAOTek Ammonium Ion Meter

SKU: GAOTek-IMWMM-204
This ammonium ion meter has an Ion accuracy of 0.5 % FS, an ion range of 5×10-6 to 1 m, 0.1 ppm to 18000 ppm and mV range of ± 1999.9 mV.

GAOTek Ammonium Ion Nitrate Meter

SKU: GAOTek-NIM-207
This Ammonium Ion Nitrate Meter has a measuring range 0.1 to 18000ppm, resolution 0.001 ppm, accuracy ±1%, and data communication of Rs485.

GAOTek Ammonium Ion Nitrate Sensor

SKU: GAOTek-HIM-204
The Ammonium Ion Nitrate Sensor has a measuring range of 0.1 ppm to 18000 ppm, a resolution of 0.001 ppm, and 32 °F to 122 °F of Temp measure range.

GAOTek Ammonium Ion Sensor

SKU: GAOTek-WQIM-414
The Ammonium Ion Sensor has a measured range of 0 mg/L to 1000 mg/L, accuracy of ± 2.5 %, resolution of 0.1 mg/L, and 4 mA to 20 mA of output signal.

GAOTek Analyzer Nitrate Ion Meter

SKU: GAOTek-NIM-204
GAOTek Analyzer Nitrate Ion Meter NO3 absorbs at 210nm ultraviolet light.

GAOTek Aquarium Water Detecting Nitrite Ion Meter

SKU: GAOTek-NIM-208
GAOTek aquarium water detecting nitrite ion meter is encapsulated in a closed electrolyte cavity. The working electrode gold electrode is directly in contact with the solution to be tested.NO2- in solution is oxidized directly on the surface of the working electrode to form a current, which is proportional to the content of NO2 in solution.

GAO’s water ion meters have the following functions:

  • Water Quality Analysis: GAO’s water ion meters are used to determine the quality of water by measuring the concentration of various ions. They are used in laboratories and water treatment plants to monitor the quality of drinking water, wastewater, and industrial process water.
  • pH measurement: Our water ion meters measure the acidity or alkalinity of water by determining the concentration of hydrogen ions present in the water. pH levels affect the taste, odor, and quality of water, and water ion meters help to ensure that water is at an appropriate pH level.
  • Environmental Monitoring: GAO’s water ion meters can also be used to monitor the quality of water in natural environments such as lakes, rivers, and oceans. This is important for identifying pollution and ensuring the health of aquatic ecosystems.
  • Industrial Processes: GAO’s water ion meters are used in various industrial processes where water quality is important. For example, in the semiconductor industry, our water ion meters are used to monitor the purity of the water used in manufacturing processes.

GAO’s water ion meters are often rugged, versatile and precision measurement instruments. They comply with applicable industry standards such as ISO 7888:2011, ASTM, ASTM, and EPA Method 300.0.

GAO’s water ion meters help our customers to comply with relevant U.S. government regulations such as:

  • Clean Water Act (CWA)
  • Safe Drinking Water Act (SDWA)
  • Good Laboratory Practice (GLP)
  • National Primary Drinking Water Regulations (NPDWR)
  • Occupational Safety and Health Administration (OSHA)

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

  • Canadian General Standards Board (CGSB)
  • Canadian Drinking Water Quality Guidelines (CDWQG)
  • Safe Drinking Water for First Nations Act (SDWFNA)
  • Canadian Environmental Protection Act (CEPA)
  • Measurement Canada

GAO’s water ion meters have the following applications:

  • Water treatment: pH is an important parameter for water treatment, as it affects the solubility of various contaminants and the efficiency of disinfection. ORP is also used as an indicator of disinfection efficacy. GAO’s water ion meters can be used to monitor the pH and ORP levels in water treatment plants to ensure safe and clean water supply.
  • Aquaculture: Improper levels of pH and ORP can lead to fish mortality and poor growth rates. Our water ion meters can help fish farmers monitor and maintain optimal water conditions for their fish.
  • Hydroponics: pH and ORP levels also play a critical role in hydroponics, where plants are grown in a nutrient-rich water solution. GAO’s water ion meters can be used to monitor and adjust the pH and ORP levels to ensure optimal growth and nutrient uptake.
  • Swimming pools and spas: The pH and ORP levels of swimming pools and spas must be carefully monitored to ensure the safety and comfort of swimmers. Our water ion meters can be used to check the water quality and adjust the chemical balance as needed.

Below are our resource pages containing useful information on Ion Meters:

FAQ on Ion Meters
How to Choose a Ion Meter
Components of a Ion Meter
Operation, Maintenance, and Calibration of a Ion Meter
Customers of Ion meters in the U.S. and Canada
Applications of Ion Meters Food and Beverage Quality Control
Applications of Ion Meters in Electroplating And Metal Finishing
Applications of Ion meters in Textile Industry
Applications of Ion Meters in Waste Water Treatment
Applications Of Ion Meters in Petrochemical Industry
Applications of Ion meters in Cosmetics and personal care product formulation
Applications of Ion Meter in Pharmaceutical Research and Development
Applications of Ion meters in Paper and pulp industry
Applications of Ion Meters in Dairy and Milk Production Quality Control
Applications of Ion Meters in Biotechnology and Bioprocessing
Applications of Ion meters in Mining and Ore Analysis
Applications of Ion Meters in Research and Academic Laboratories Industry
Applications of Ion Meters in Agricultural and Soil Analysis
Application of Ion Meters in Water Quality Testing
Applications of Ion Meters in Environmental Monitoring
Application of Ion Meters in Organic Chemistry Field
Applications Of Ion Meters In Quarrying Industry
Application of Ion Meters in Management of Companies and Enterprises Industry
Application of Ion Meters in Educational Services Industry
Application Of Ion Meters In Finance And Insurance Industry
Applications of Ion Meters in Public Administration Industry
Application of Ion Meters in Real Estate and Rental and Leasing Industry
Applications of Ion Meters in Arts, Entertainment, And Recreation Industry
Applications of Ion meters in Health Care And Social Assistance
Applications of Ion Meters in Forestry And Fishing Industry
Applications of Ion Meters in Professional, Scientific, And Technical Services Industry
Applications of Ion Meters in Fishing Industry
Applications of Ion Meters in Wholesale Trade Industry
Applications of Ion Meters in Other Services Industry
Application of Ion Meters in Transportation And Warehousing Industry
Applications of Ion Meters in Mining Industry
Applications of Ion Meters in Accommodation And Food Services Industry
Applications of Ion Meters in Utilities Industry
Applications of Ion Meters in the Manufacturing Industry
Applications of Ion Meters in the Oil and Gas Extraction Industry
Applications of Ion Meters in the Professional and Scientific and Technical Services Industry
Applications of Ion Meters in the Public Administration Industry
Applications of Ion Meters in the Utilities Industry

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