Elias wiped his glove across the faceplate of Unit 4. The display flickered, the backlight a sickly green in the gloom.
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The manual describes an explosion-proof, open-path infrared gas detector designed for stationary monitoring of combustible hydrocarbons. This system, comprising a transmitter and a receiver, is capable of detecting gas concentrations at distances ranging from 4 to 200 meters. Key Technical Specifications Elias wiped his glove across the faceplate of Unit 4
07-S: IR-Source Failure / Optics Obstructed. comprising a transmitter and a receiver
The manual emphasizes that the first few seconds are the most dangerous. Panic often leads to improper usage.