Extech FM100 Formaldehyde (CH²O or HCHO) Monitor
Extech FM100 Formaldehyde (CH²O or HCHO) Monitor

Extech FM100 Formaldehyde (CHv•_O or HCHO) Monitor

Part Number: FM100
Price: $249.99
temporarily out of stock - back in stock in 5 to 10 days

Extech FM100 Formaldehyde Monitor

(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.


  • Alternately displays Formaldehyde concentration, Air Temperature, and Relative Humidity readings (cycles approximately every 6 seconds)
  • Visible bright tri-colored LED indicator: Green <0.08ppm, Yellow = 0.08 to 0.79ppm, and Red = 0.80ppm and above
  • LCD displays alarm icon, LED light turns red, and loud audible beeper sounds when indoor CH²O level exceeds set point (defaults at 0.08ppm); beeper can be temporarily turned off for false alarm
  • Selectable CH²O unit as ppm or mg/m³
  • "ZERO" Re-Calibration function
  • Manual Temperature and Relative Humidity Compensation (adjustable)



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
0 Items