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Extech FM200 Formaldehyde (CH2O or HCHO) Monitor
Extech FM200 Formaldehyde (CH²O or HCHO) Monitor

Extech FM200 Formaldehyde (CH2O or HCHO) Monitor

Part Number:FM200
temporarily out of stock - back in stock in 5 to 10 days

Extech FM200 Handheld Formaldehyde Monitor with Detachable Probe

(CH²O or HCHO)


Measures Formaldehyde concentration, Air Temperature and Humidity with user-settable alarm. Perfect for monitoring indoor air quality of areas affected by formaldehyde gas. Back stand for desktop display or can be wall mounted.


  • Simultaneously displays Formaldehyde concentration, Air Temperature, and Relative Humidity readings on large LCD with backlight feature
  • Audible alarm default at 0.08ppm (adjustable)
  • Designed with Electrochemical CH²O sensor
  • Sensor LED indication where green indicates sensor is connected properly and power is on, red LED shows the fan is in working condition (active = flashing red; inactive = solid red)
  • Built-in bumper that allows the fan inside the sensor to draw in gas quickly


Formaldehyde is used in the manufacture of many industrial and consumer goods. Emissions from some of these items can rise when moisture and heat increase. These emissions are a contributing factor to Sick Building Syndrome, which may lead to itchy eyes and throat, as well as headaches and dizziness.

  • Glue
  • Paint
  • Insulation / Plywood / Fiberboard
  • Timber Paneling / Particleboard
  • Cosmetics
  • Shampoos
  • Soap Bars / Body Wash
  • Lotions
  • Toothpaste

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