Martindale CO90 Carbon Monoxide Detector
The Martindale CO90 is a reliable, carbon monoxide meter with a low battery indication. The clear LCD display shows the reading in ppm, with an audible beeper that speeds up with CO concentration, becoming a continuous tone above 200ppm. Max & Hold buttons allow for one reading, or the highest reading, to be displayed over a period of time. The CO90 carbon monoxide detector is supplied with battery and manual.