19
3 Operation
3.2.5
House
Area of use
– Freely accessible pipes in buildings, industrial plants, test
laboratories
– Measuring very low gas concentrations
– Locating the source of gas
– Finding leaks at internal connections
– Leak testing of industrial components
Symbol
Unit
–
ppm (parts per million)
– % vol.
Measuring range
Gas-sensitive
semiconductor
0.0 to 10,000 ppm
Thermal
conductivity sensor
0.1 to 5 % vol.
Measurement data display
Fig. 9: House measuring mode
– Digits, e.g. 0.2 ppm H
2
– Bar graph with quasi-logarith-
mic scale
