Reed Instruments Carbon Monoxide Monitor with Temperature & Humidity (includes ISO Certificate), 0 - 999 ppm, 10 ppm ± (R9450-NIST)

Carbon Monoxide Monitor with Temperature & Humidity (includes ISO Certificate)Measures carbon monoxide (CO), air temperature and relative humidityFeatures a large LCD display, built-in clock and calendar, max hold function and user-adjustable alarm limitCan be mounted on a wall or placed on desktopManual CO calibration to zeroLow battery indicatorIncludes: Includes: Desktop Carbon Monoxide (CO) monitor with temperature & humidity, Batteries, ISO Certificate with full Data and Uncertainties