CO Monitoring Instruments
IAQ Detectors, the instrumentation brand of Ace Instruments, manufactures CE certified wall-mount and duct-type carbon monoxide transmitters for parking garages, mechanical rooms, generator rooms, and commercial buildings. Carbon monoxide is colourless and odourless, so continuous instrumentation is the only reliable detection method.
WHO guidelines set an 8-hour exposure limit of 25 ppm, while OSHA 29 CFR 1910 sets a workplace limit of 50 ppm.
CO level reference — ppm
WHO annual average 9 ppm
WHO 8-hour exposure limit 25 ppm
OSHA 8-hr TWA workplace limit 50 ppm
ACGIH — headache in 2–3 hrs 200 ppm
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