Electronic pressure switch

Details Electronic pressure switch Electronic pressure switch

2007-02-23

2010-06-15

Caputo, Lisa M (Department: 2855)

Measuring and testing

Fluid pressure gauge

Photoelectric

C073S753000

Reexamination Certificate

active

07735372

ABSTRACT:
An electronic pressure switch has only two terminals, a resistance measuring bridge pickup, an amplifier unit downstream of the resistance measuring bridge, a comparator connected to the amplifier unit and a switching stage downstream of the comparator achieves a lower residual current in the blocked state and a lower voltage drop in the switched state. The resistance measuring bridge has a high internal resistance and the amplifier unit supplies both an analog measurement signal corresponding to the analog measured value of the resistance measuring bridge and a threshold value to the comparator at low resistance. A high-resistance balancing network is assigned to the resistor network, and an in-phase regulator on the input side limits and controls the supply voltage of the resistance measuring bridge, the amplifier unit, the comparator and the balancing network and the switching stage is made as a shunt controller triggered by the output of the comparator.

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Adaptation of Strain Gauges to Battery Supplied Data Collectors, Mielentz et al., Elektronik, Feb. 1993, pp. 14-17, English Summary of Article Attached.

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