Gas detection
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The Model 450A-1 Digital Pocket Size Carbon Monoxide Meter from Dwyer Instruments (USA) measures the ambient concentration of carbon monoxide (CO) in the environment and displays the measurement on the two line digital LCD screen. Besides the measurement, the maximum recorded CO value since the last reset is shown. An audible carbon monoxide alarm gives warning of CO levels above 25 ppm. For viewing in poorly lit environments, the built-in back light brightens the display. Model 450A-1 includes soft carrying case with belt loop, wrist strap, and three AAA batteries.
AET 30.4 Nov 2026
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