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EXTECH FM200 Formaldehyde (CH2O or HCHO) Meter

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The Extech FM200 measures Formaldehyde concentration, Air Temperature, and Humidity. Adjustable audible alarm feature is excellent for checking indoor air quality in buildings.

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 manufacturers
  • Insulation/Plywood/Fiberboard
  • Timber Paneling/Particleboard
  • Cosmetics
  • Shampoos
  • Soap Bars/Body Wash

Authorised Australian Distributor

CE   1 Year

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SKU: EXTECH FM200 Category: Tag:

The Extech FM200 measures Formaldehyde CH2O (HCHO) concentration, Air Temperature, and Relative Humidity. The alarm feature alerts the user when the Formaldehyde 0.08ppm limit is exceeded.   This device is shipped fully tested and calibrated and, with proper use, will provide years of reliable service. Please visit our website ( to check for the latest version of this User Guide, Product Updates,

EXTECH FM200 Features:

  • FM200 is a handheld Formaldehyde Meter with Detachable Probe
  • 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
  • CH2O Calibration function in fresh air
  • Min/Max and Data Hold
  • Auto power off with disable
  • Low battery indicator
  • Complete with soft tube (approx. 300mm), sensor with 655mm cable, 6 AAA batteries and carrying case


Specifications Range Resolution Basic Accuracy
Formaldehyde (CH2O or HCHO) 0.00 to 5.00ppm 0.01ppm ±5%
Air Temperature 32 to 122°F (0 to 50°C) 0.1°F/°C ±2°F/1°C
Relative Humidity 10% to 90%RH 0.1%RH ±5%RH
Dimensions 6.3 x 2.4 x 1.6” (160 x 60 x 40mm)
Weight 6.4oz (181.4g)



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