| 摘要 |
To detect the volume of gas remaining in a gas bottle or a fixed tank of a system for supplying liquefied gas as fuel for a combustion engine, a positive temperature coefficient (or PTC) probe ( 16 ) is placed in the gas feed line ( 12 ) between the gas source and the combustion engine. The PTC probe ( 16 ) detects the change of phase, from the liquid phase of the liquefied gas to the gaseous phase, in the feed line ( 12 ) and delivers an electrical signal to an electronic circuit that triggers a visual or audible signal in response to the detection of the phase change.
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