Extech CO15 Air Quality Meter:

Check CO levels up to 999ppm with the push of a button using Model CO15. An audible alarm indicator will continuously beep starting at 25ppm (preset warning level - value can be adjusted) and the display will flash until the CO level goes down to normal range. A backlight on the display can be used for low-light areas. The meter comes complete with batteries, a wrist strap, and a pouch.

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