Patents Assigned to Crowcon (Instruments) Limited
  • Electrical remote sensing system
    Patent number: 4198621
    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.
    Type: Grant
    Filed: November 14, 1977
    Date of Patent: April 15, 1980
    Assignee: Crowcon (Instruments) Limited
    Inventor: Graham B. Roper