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  1. #1
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    Ferrite rings for thermocouple wires.

    Hello,
    We recently measured the temperatures of the components of our 60W Flyback SMPS with many k type thermocouples, whilst it was in the thermal chamber.

    Obviosuly, the power cable to the converter, as well as the thermocouples, go through the same chamber port in order for us to connect to the data logger and mains power supply

    Only one thermocouple, the one that was measuring the internal ambient of the chamber, was giving noisy readings. We wish to buy some ferrite rings so that the thermocouple wire can be threaded through it to mitigate noise issues.
    (I don’t think we need a shielded thermocouple since this thermocouple was further away from switching voltages on the PCB than other thermocouples)

    Can you suggest anywhere to buy these below ferrite rings cheaper? (there is a £15 postal charge to uk)
    https://uk.farnell.com/fair-rite/596...rtie%20torroid

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  2. #2
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    Re: Ferrite rings for thermocouple wires.

    https://www.eurotech.co.uk/product-d...RITE&ID=255423
    You will have to ask them for the price. If you do, ask for Julia and say Brian sent you. I have no connection with the company but Julia is a relative.

    Brian.
    PLEASE - no friends requests or private emails, I simply don't have time to reply to them all.
    It's better to share your questions and answers on Edaboard so we can all benefit from each others experiences.

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  3. #3
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    Re: Ferrite rings for thermocouple wires.

    any core from a CM choke will do ...

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