The Vaisala portable CO2 meter GM12 combines a robust, lightweight
construction with ease of use and high performance specification.
of the GM12 is via a membrane keypad. A loud alarm sounds and
a red light turns on when the measured gas concentration exceeds the
alarm level which can be preset as required. The gas concentration
is shown on the clear 4 digit LCD. The housing of the GM12 is IP 65 classified. The detector used in the GM12 meter is
based on non-dispersive infrared (NDIR) gas sensing. This technique
makes the sensor highly gas specific; the sensor is also accurate
and has excellent long-term stability.