Extech Digital Thermometer

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Simultaneously displays formaldehyde concentration, air temperature, and relative humidity readings with date (year, month, day) and time
Visibly bright LED (green and red) and 3 facial icons indicate indoor CH2O warning level
Audible beeping alarm default at .08-ppm (adjustable)

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Measures formaldehyde concentration, air temperature and humidity.

Simultaneously displays formaldehyde concentration, air temperature, and relative humidity readings with date (year, month, day) and time
Visibly bright LED (green and red) and 3 facial icons indicate indoor CH2O warning level
Audible beeping alarm default at .08-ppm (adjustable)
Designed with electrochemical CH2O sensor
Minimum/maximum value recall function
Calculates statistical weighted averages of TWA (8-hour time weighted average) and STEL (15-minute short term exposure limit)
CH2O calibration function in fresh air
Internal memory for manually storing up to 99 readings with recall function
Complete with universal AC adapter (100 Volt to 240 Volt) and multiple plug types (US, EU, UK, AUS)