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Chlorine (Cl2) Gas Detectors

Chlorine (Cl2) is used in many industries, including pharmaceutical, food and beverage, pulp and paper, electronics, and wastewater treatment. Specifically, chlorine is used in manufacturing plastics, pesticides, gasoline additives, brake fluid, and antifreeze. Oil refineries inject chlorine directly into stacks to reduce sulfur emissions. Proper chlorine gas detection is essential in locations where workers are likely to be exposed to toxic Cl2 gas, such as in storage tanks or near processing units.

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Characteristics of Chlorine

Chlorine is greenish yellow gas with a characteristic pungent odor. Although not classified as an explosive gas, chlorine will react explosively or form an explosive compound when combined with substances like acetylene, ether, turpentine, ammonia, hydrogen, and fuel gas.

Chlorine derivatives are commonly used for their disinfectant properties. Chlorine is highly toxic. The toxins take their route through the lungs, irritating the respiratory tract. High doses of chlorine gas can cause death quickly.

More about Chlorine expand table collapse table


Will not explode
Extremely toxic
Oxidizing agent
Chlorine gas, molecular chlorine
Exposure limits:
PEL\TWA: 1 ppm
STEL: 1 ppm/ 15 min.
IDLH: 30 ppm / 30 min.
Municipal pools, pulp and paper, wastewater treatments plants, Hazmat, railroad yards

Effects of Various Cl2 Levels

CL2 Level in PPM
Resulting Conditions on Humans
Permissible Exposure Level (OSHA, ACGIH).
Irritation of the mucous membranes, eyes, and respiratory tract.
Produces an easily detectable odor.
Causes immediate irritation of the throat.
Maximum exposure for 30 minute period.
Pain, tightness in the chest, and death results from prolonged exposure.

How to Detect Chlorine

For the most reliable and accurate detection of chlorine gas, Industrial Scientific offers the Radius® BZ1 Area Monitor, the MX6 iBrid® and Ventis® Pro5 portable multi-gas detectors, and the GasBadge® Pro personal single-gas detector.

Multi-Gas Monitor

Ventis Pro5

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Multi-Gas Monitor

MX6 iBrid

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Area Monitor

Radius BZ1

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GasBadge Pro

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