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500ppm coal gas Gas Concentration Detector

500ppm coal gas Gas Concentration Detector

Mar 28, 2007Concentrations greater than 500ppm are dangerous to life and health after short exposures. Sulphur dioxide can be measured using a portable gas detector fitted with an electrochemical cell or by using indicator stain tubes. The current exposure standards specified for sulphur dioxide are: TWA of 2ppm. STEL of 5ppm. Nitrogen dioxide (NO 2)

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