| 摘要 |
The present invention relates to a device for measuring the level and/or volume of liquid in a tank, of the type comprising a resistive level transmitter T whose resistance varies as a function of the level of liquid, and an indicator apparatus Re which delivers an indication which is a function of the resistance of the transmitter, characterised in that a resistor of fixed resistance is connected in series with the variable resistor R11 between the output 10 of the resistive level transmitter T and earth, voltage comparator means 20, 60, 70 receiving at least one reference voltage Ref 1, Ref 2 are connected at a point situated between the output 10 of the transmitter T and the input E of the indicator apparatus Re, and operational failure indicators 90 are connected at the output of the comparator means 20, 60, 70. <IMAGE>
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