pHG-3081 Industrial Online pH Meter 

pHG-3081 industrial pH meter is our latest generation of microprocessor-based instrument, with English display, menu operation, a high intelligent, multi-function, high measurement performance, environmental adaptability and other characteristics. It is a highly intelligent online continuous monitoring instrument, integrate with the sensor and the second meter. Can be equipped with three composite or two composite electrodes to meet a variety of sites. Can be widely used for continuous monitoring of pH value for thermal power, chemical fertilizer, metallurgy, environmental protection, pharmaceutical, biochemical, food and water and other solution.




New design, Aluminium shell, Metal texture.


Intelligent: This industrial pH meter adopts high-precision AD conversion and single chip microcomputer processing technologies and can be used for the measurement of the pH values and temperature, automatic temperature compensation and self-checking.

Reliability: All the components are arranged on one circuit board. No complicated functional switch, adjusting knob or potentiometer arranged on this instrument.

Double high impedance input: The latest components are adopted; The impedance of the double high impedance input can reach as high as l012Ω. It has strong interference immunity.

Solution grounding: This can eliminate all the disturbance of the ground circuit.

Isolated current output: Optoelectronic isolating technology is adopted. This meter has strong interference immunity and the capacity of long-distance transmission.  

Communication interface: it can be easily connected to a computer to perform monitoring and communication.

Automatic temperature compensation: It performs automatic temperature compensation when the temperature is within the range of 0~99.9.

Water proof and dust-proof design: Its protection grade is IP54. It is applicable for outdoor use.

Display, menu and notepad: It adopts menu operation, which is like that in a computer. It can be easily operated only according to the prompts and without guidance of the operation manual.

Multi-parameter display: The pH values, input mV values (or output current values), temperature, time and status can be displayed on the screen at the same time.


Technical Indexes


1. Measuring range: pH value: 0~14.00pH; division value: 0.01pH

  Electric potential value: ±1999.9mV; division value: 0.1mV

  Temperature: 0~99.9; division value: 0.1

2. Range for automatic temperature compensation: 0~99.9, with 25as the reference temperature, (0~150for Option)

3. Water sample tested: 0~99.9℃,0.6Mpa

4. Automatic temperature compensation error of the electronic unit: ±0 03pH

5. Repeatability error of the electronic unit: ±0.02pH

6. Stability: ±0.02pH/24h

7. Input impedance: 1x1012Ω

8. Clock accuracy: ±1 minute/month

9. Isolated current output: 010mA(load <1 5kΩ), 420mA(load <750Ω)

10. Output current error: ≤±lFS

11. The data storage capacity: 1 month (1 point/5 minutes)

12. High and low alarm relays: AC 220V, 3A

13. Communication interface: RS485 or 232 (optional)

14. Power supply: AC 220V±22V, 50Hz±1Hz, 24VDC(optional)

15. Protection grade: IP54, Alluminium shell for outdoor use

16. Overall dimension: 146 (length) x 146 (width) x 150 (depth) mm;

   dimension of the hole: 138 x 138mm

17. Weight: 1.5kg

18. Working conditions: ambient temperature: 0~60; relative humidity <85

19. It can be equipped with a 3-in-1 or 2-in-1 electrode.



pH8012 Industrial Online Compound pH Electrode

 Basic Principle of pH Electrode


In pH measurement, the used electrode is also known as the primary battery. The primary battery is a system, whose role is to transfer chemical energy into electrical energy. The voltage of the battery is called the electromotive force (EMF). This electromotive force (EMF) is composed of two half-batteries. One half-battery is called the measuring electrode, and its potential is related to the specific ion activity; the other half-battery is the reference battery, often called the reference electrode, which is generally interlinked with the measurement solution, and connected to the measuring instrument.


Technical indexes

Model No.: pH8012

1. Measuring range: 0-14pH

2. Temperature range:0-85℃

3. Compressive strength:0.6MPa

4. Slope: ≥96

5. Zero point potential: E0=7PH±0.3

6. Internal impedance: 150-250 MΩ (25℃)

7. Profile: 3-in-1Electrode (Integrating the temperature compensation and the solution grounding)

8. Installation size: Upper and Lower 3/4NPT Pipe Thread

9. Connection: Low-noise cable goes out directly.

10. Application: Applicable to various industrial sewage, environmental protection and water treatment.  





Features of pH Electrode

It adopts the world-class solid dielectric and a large area of PTFE liquid for junction, non-block and easy maintenance.


 Long-distance reference diffusion channel greatly extends the service life of electrodes in the harsh environment

 It adopts PPS/PC casing and the upper and lower 3/4NPT pipe thread, so it is easy for installation and there is no need of the jacket, thus saving the installation cost.


 The electrode adopts the high-quality low-noise cable, which makes the signal output length more than 20meters free of interference.


 There is no need for additional dielectric and there is a little amount of maintenance.

 High measurement accuracy, fast responding and good repeat-ability.


 Reference electrode with silver ions Ag/AgCL

 Proper operation shall make service life longer.


 It can be installed in the reaction tank or pipe laterally or vertically.

 The electrode can be replaced by a similar electrode made by any other country.



FOB Price: 480USD/set
Minimum Order: 1 set
Port: Shanghai
Payment Terms: TT or Trade Assurance

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