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Intrinsically safe sensor and data transmission system

  • US 20010028305A1
  • Filed: 05/08/2001
  • Published: 10/11/2001
  • Est. Priority Date: 04/12/1999
  • Status: Active Grant
First Claim
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1. A sensor monitoring and alarm system adapted for use in an electrically hazardous environment, the system comprising:

  • a. a battery;

    b. a sensor to sense a time varying parameter, the sensor sealed from volatile gases and powered by the battery;

    c. a switch coupled to the sensor and adapted to change state at a predetermined reading from the sensor;

    d. an intrinsically safe, monitored transmitter activated by the switch and adapted to transmit, upon activation, an alarm signal which uniquely identifies the sensor being monitored, the monitored transmitter powered by the battery;

    e. a central receiver to monitor the monitored transmitter, to receive the alarm signal from the monitored transmitter, and to generate a response signal;

    f. a responsive unit to receive the response signal from the receiver and to develop an action as a result of the response signal; and

    g. means for applying battery power to the sensor on command.

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