Digital membrane residual chlorine sensor

Technical Guidance

Measurement medium: HOCL/residual chlorine

Range: 0.05~20ppmHOCL (HOCL/residual chlorine)

Polarization time: 30 minutes for the second time, 10 minutes for the second time (HOCL/residual chlorine)

90 minutes for the second time, 45 minutes for the second time (trace HOCL/residual chlorine)

Response time: 90% 2min (room temperature), 95% 5min (room temperature)

● Temperature range: 2~45 ℃ during measurement

● Low flow rate: 200~250ml/min

The flow rate during circulation cannot be less than 30L/H

● PH range: 4-8 pH

● Pressure resistance range: 0~1 bar

● Temperature compensation: PT1000

Electrode cable: 3m high impedance low-noise shielded cable

Electrode size: 20mm directly, 70mm in length

Electrode material: 316L stainless steel shell, POM membrane cap, PTFE membrane.

■ Electrode characteristics

Sensitive response, high accuracy, and good stability

Easy to operate and requires minimal maintenance

Suitable for various media, the membrane is not easily damaged and resistant to pollution

Measurement principle

The DCL-280 residual chlorine electrode is a diaphragm type polarographic sensor consisting of a cathode, an anode, an electrolyte, and a gas permeable thin film covering the cathode. The residual chlorine in the measured liquid diffuses through the diaphragm to the cathode, and an appropriate polarization voltage between the cathode and anode can reduce the residual chlorine on the cathode. These chemical reactions generate a current proportional to the residual chlorine in the measured solution.

■ Scope of application

Suitable for online monitoring of residual chlorine concentration in disinfection and sterilization processes of drinking water and industrial process water, and can also be used in situations such as swimming pools where residual chlorine concentration needs to be measured.