Detect current flow in 240v circuit

Discussion in 'General Electronics Chat' started by Ian Cashmore, Oct 12, 2015.

  1. Ian Cashmore

    Thread Starter New Member

    Oct 12, 2015
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    Hi All,
    I have installed a 240v tracer wire to stop my pipes freezing in winter. The tracer wire and thermostat are fully sealed with no indication for on or off. I would like to fit something inside the 240v fused spur to indicate if the device is on via a LED. The only way I can think of doing this is to measure the current drawn by the device and when it goes over a preset limit( say 500mA) it lights the LED.
    Any ideas how I can do this.
    Many Thanks
     
  2. MikeML

    AAC Fanatic!

    Oct 2, 2009
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  3. Ian Cashmore

    Thread Starter New Member

    Oct 12, 2015
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  4. dl324

    Distinguished Member

    Mar 30, 2015
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    You could use a current transformer or hall effect sensor. You could also sense temperature.
     
  5. MaxHeadRoom

    Expert

    Jul 18, 2013
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