The gas carrier exchanges (either desorbs or absorbs) the
gas in the equilibrium gas chamber.  The concentration of the gas in the chamber is constant and shown on the LCD display.  Unlike a traditional gas detector or sensor calibration system, this device eliminates tubes, valves, regulators, and other mechanisms required for calibration.  It provides not only the convenience of use but also better accuracy of the gas concentration.  The gases testable are:

• Hydrogen Fluoride (HF) - 1 - 15ppm
• Hydrogen Fluoride (HF) - 1 - 50ppm
• Formaldehyde (CH₂O) - 2 - 20ppm

Semeatech has a complete line of Electrochemical Sensors and Accessories for your gas sensing requirements.