This hand held instrument has a built in high sample drawing fan and high sensitivity semi-conductor gas sensor. There are 4 versions which are designed to detect and trace leaking sources of Flon, Methyl Bromide, Ammonia and Hydrocarbons.
The GH-202F has an easy to read LED level meter and a audio alarm. The instrument incorporates a unique automatic balance and purge circuit. This allows the GH-202F to compensate for any background noise and temperature variations.
A high and low sensitivity switch allows you to choose between a higher or lower range. When the battery voltage is dropped to replacement level, the power lamp starts flashing at the “ON” position.