Understanding the Purpose of an orp meter

An orp meter, also known as an oxidation-reduction potential meter, is a device used to measure the ability of a solution to oxidize or reduce another substance. This measurement is important in various industries, including water treatment, aquaculture, and food processing. Understanding the purpose of an orp meter is crucial for ensuring the quality and safety of products and processes.

orp meters work by measuring the voltage difference between a reference electrode and a measuring electrode immersed in a solution. This voltage difference is directly related to the concentration of oxidizing or reducing agents in the solution. A positive ORP value indicates that the solution is oxidizing, while a negative value indicates that it is reducing.

In water treatment, orp meters are used to monitor the effectiveness of disinfection processes. For example, in swimming pools, a high ORP value indicates that there is a sufficient amount of chlorine present to kill bacteria and other pathogens. On the other hand, a low ORP value may indicate that the water is not adequately disinfected and could pose a health risk to swimmers.

In aquaculture, orp meters are used to monitor the water quality in fish tanks and ponds. Fish are sensitive to changes in water chemistry, and maintaining the proper ORP level is essential for their health and growth. By regularly measuring the ORP value, aquaculturists can ensure that the water is free from harmful contaminants and that the fish are thriving in a safe environment.


Model CLA-7000 Series Free Chlorine(DPD)online automatic analyzer
Inlet channel Single channel/Double channel
Measurement range Free chlorine:(0.0~2.0)mg/L or (0.5~10.0)mg/L ,Calculated as Cl2; pH:(0-14); Temperature(0-100)℃
Accuracy Free chlorine:±10% or ±0.1/0.25 mg/L; pH:±0.1pH;Temperature:±0.5℃
Measurement Period ≤2.5min
Sampling interval The interval (1~999) min can be set arbitrarily
Maintenance cycle Recommended once a month (see maintenance chapter)
Environmental requirements A ventilated and dry room without strong vibration;Recommended room temperature:(15~28)℃;Relative humidity:≤85%(No condensation)
Water sample flow (200-400) mL/min
Inlet pressure (0.1-0.3) bar
Inlet water temp. (0-40)℃
Power supply AC (100-240)V; 50/60Hz
Power 120W
Power connection The 3-core power cord with plug is connected to the mains socket with ground wire
Data output RS232/RS485/(4~20)mA
Size H*W*D:(800*400*200)mm

In food processing, orp meters are used to monitor the quality and safety of food products. For example, in the production of canned goods, maintaining the proper ORP level is crucial for preventing spoilage and ensuring that the food is safe for consumption. By measuring the ORP value of the food during processing, manufacturers can identify any potential issues and take corrective action to prevent contamination.

Overall, the purpose of an orp meter is to provide a quick and accurate measurement of the oxidation-reduction potential of a solution. By monitoring this value, industries can ensure the quality and safety of their products and processes. orp meters are versatile tools that can be used in a wide range of applications, from water treatment to food processing, and are essential for maintaining high standards of quality and safety.


In conclusion, understanding the purpose of an orp meter is essential for anyone working in industries where water quality and product safety are paramount. By using an orp meter to monitor the oxidation-reduction potential of solutions, industries can ensure that their processes are efficient, effective, and safe. orp meters are valuable tools that provide valuable insights into the chemical composition of solutions and play a crucial role in maintaining high standards of quality and safety.

Model pH/ORP-510 pH/orp meter
Range 0-14 pH; -2000 – +2000mV
Accuracy ±0.1pH; ±2mV
Temp. Comp. Manual/Automatic temperature compensation; No Comp.
Oper. Temp. Normal 0~60℃; High temp 0~100℃
Sensor pH double/triple sensor; ORP sensor
Display LCD Screen
Communication 4-20mA output/RS485
Output High/Low limit dual relay control
Power AC 220V±10% 50/60Hz or AC 110V±10% 50/60Hz or DC24V/0.5A
Working Environment Ambient temperature:0~50℃
Relative humidity≤85%
Dimensions 48×96×100mm(H×W×L)
Hole Size 45×92mm(H×W)
Installation Mode Embedded

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