indoor compact formaldehyde (ch₂o or hcho) monitor with tilt leg stand

features

alternately displays formaldehyde concentration, air temperature, and relative humidity readings (cycles approximately every 6 seconds)

• visible bright tri-colored (green, yellow, red) led alarm indicator
• selectable ch₂o unit as ppm or mg/m³
• adjustable audible alarm for readings exceeding set point (default at 0.08ppm)
• zero re-calibration function
• manual temperature and relative humidity compensation (adjustable)
• designed with electrochemical ch₂o sensor
• ch₂o calibration function in fresh air
• low battery indicator
• complete with universal ac adaptor (including us, eu, uk, and au plugs), and 4 aaa batteries