How To Test For Chlorine Concentration in Air ?

- Dec 31, 2025-

Chlorine (Cl₂) is a yellowish-green, highly toxic and strongly oxidizing gas, widely used in water treatment, chemical engineering, pharmaceuticals and other industries. However, when it leaks, it poses a great threat to human health and the environment.

 

There are many types of equipment for detecting the concentration of chlorine gas (Cl₂). According to different application scenarios (such as industrial monitoring, environmental detection, emergency response, etc.), appropriate instruments can be selected. The following are common chlorine cl2 gas detector and their features:

 

1.Portable chlorine gas detector (electrochemical/semiconductor principle) application scenarios

Industrial site inspection

Personal safety protection (such as in chemical plants and water treatment plants)

Emergency accident response (Leakage detection)

Equipment Characteristics

Portable design (handheld or wearable)

Real-time display of concentration (unit: ppm or mg/m³)

Sound and light alarm (automatic alarm when over-limit is exceeded)

Data recording (Some models support Bluetooth /Wi-Fi transmission)

2. Fixed online chlorine gas monitor. Applicable scenarios

Continuous monitoring of chemical plants, sewage treatment plants, waterworks, etc

- Hazardous areas (such as near chlorine storage tanks and pipelines)

Equipment Characteristics

24/7 real-time monitoring, which can be networked to the central control system

High-precision (electrochemical or optical sensor)

Explosion-proof design (applicable to hazardous areas)

Remote alarm (SMS/sound and light /PLC linkage)

 

3. Chlorine gas detection tube colorimetric method

Detection principle: Chlorine gas reacts with chemical reagents (such as o-toluidine) to change color, and is quantified by colorimetry.

 

Gas detectors are key equipment in fields such as industrial safety, environmental protection, and occupational health. They are used to monitor toxic, flammable, and explosive gases in real time, prevent accidents, and ensure personnel safety.

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