Electrical remote sensing system

Details Electrical remote sensing system Electrical remote sensing system

1977-11-14

1980-04-15

Shaw, Gareth D.

Communications: electrical

Systems

Call station

340206, 340207R, G08C 1916

Patent

active

041986210

ABSTRACT:
A sensing unit described in which the cable providing the unit with power also acts to transmit a signal representative of the parameter being sensed e.g. gas concentration. The unit comprises a switched mode voltage regulator the switching frequency of which corresponds to the value of the parameter being sensed.

REFERENCES:
patent: 3717858 (1973-02-01), Hadden
patent: 3733540 (1973-05-01), Hawkins
patent: 3818306 (1974-06-01), Marini
patent: 3906437 (1975-09-01), Brandwein
patent: 4016480 (1975-04-01), Hoffman
patent: 4095165 (1978-06-01), Boros

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