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Mode of operationThe gas measuring systems for explosive gases and vapors made by J. Dittrich Elektronic determine the concentration of explosive gases and vapors in air in an ambient temperature from -10 to +50° C.
A pellistor or semiconductor sensor detects methane (CH4), hydrogen (H2), propane (C3H8), alcohol and benzine; additional hydrocarbons on request.
The calibration is carried out with the aid of the respective test gas by means of a potentiometer; however, a certain amount of cross-sensitivity of the sensor with regard to the other substances always remains. | |  | | | Low-cost infrared measuring system for methaneSince the cross-sensitivity of the sensors gives rise to problems when monitoring methane, J. Dittrich Elektronic developed a new infrared measuring system which detects specifically methane quicker, more accurately and at less cost than conventional infrared systems. | | | | | Design- The housing is made of aluminium and suitable for wall mounting.
- The measured values are output via a linear current output (4-20 mA),
- and then they are evaluated and processed further in a device arranged downstream by the user.
- Depending on the application, it is recommended that a gas measuring system with a pellistor or semiconductor sensor be used,
- for methane also a system with an infrared sensor.
- For operation in an explosive atmosphere, an explosion-proof model is available.
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