handheld formaldehyde (ch₂o or hcho) meter with detachable probe

• simultaneously displays formaldehyde concentration, air temperature, and relative humidity readings
• large lcd display with backlighting
• adjustable audible alarm (default at 0.08ppm)
• designed with electrochemical ch₂o sensor
• built-in bumper that allows the fan inside the sensor to draw in gas quickly
• ch₂o calibration function in fresh air
• min/max, data hold, auto power off and low battery indicator
• complete with soft tube (approx. 1ft/300mm), sensor with 2.1ft (657mm) cable, 6 aaa batteries and carrying case