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Cooling Resistive temperature sensor

Discussion in 'Hardware' started by wyx087, 9 Jul 2020.

  1. wyx087

    wyx087 Homeworld 3 is happening!!

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    In a bid trying to get better temperature sensing for my T-balancer hardware temperature sensor....... I had stupidly put the sensor in between CPU and cooler. I think I had crushed it, it no longer works.

    Anyone know where to buy replacement of this?

    it’s for this: https://www.quietpc.com/instructions/mcubed/manual-bigNG.pdf

    034BD06B-15F9-4834-9D43-E335273C43D8.jpeg

    Thanks
     
  2. Nealieboyee

    Nealieboyee Packaging Master!

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    Is it an analogue one? It is probably just a thermistor. Any markings on it? Numbers?
     
  3. wyx087

    wyx087 Homeworld 3 is happening!!

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    Yes, analogue resistive sensor.

    I don't think I've noticed any marking..... let me have a look later today.

    Betty! Nice to see you :)
     
  4. Nealieboyee

    Nealieboyee Packaging Master!

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    Haha. Eat it! Good to see you too Wyxie. You still gaming at all?
     
  5. wyx087

    wyx087 Homeworld 3 is happening!!

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    No, no marking what so ever :( Presumably the resistive range has to match for the replacement to work.

    Where can I find a catalogue of similar sensors and I'll see if I can find the closest.

    None of these look remotely close.... https://cpc.farnell.com/search?st=thin film resistive temperature sensor



    I've slowed down gaming for a while, stopped all multiplayer gaming after BF4 and some Battlefront (the reboot). Now picking up VR gaming thanks to HL Alyx. Also thanks to WFH, we moved in with my parents during lockdown so more people looking after the kid => more me time.

    No more gaming from you, unless your sig is outdated? How have you been?
     
    Last edited: 9 Jul 2020
  6. Goatee

    Goatee Well-Known Member

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  7. Bloody_Pete

    Bloody_Pete Technophile

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  8. Bloody_Pete

    Bloody_Pete Technophile

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    Also, putting the sensor between the CPU and cooler is a really bad idea as you'll f**k your thermal transfer!
     
  9. wyx087

    wyx087 Homeworld 3 is happening!!

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    That amazon link looks spot on. Thank you!

    I'm guessing by 10k Ohm sensor type, it means if I measure resistance on a working probe at room temperature, it should read about 10k Ohms?


    Yes, I mounted it and then took heatsink off to check thermal paste spread. Found it didn't spread much at all, so abandoned that idea.
     
  10. Bloody_Pete

    Bloody_Pete Technophile

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    I wouldn't make that assumption, as oyu don't know what range it is. You'd have to buy both and then measure the resistance at a fixed temperature and see how simular it is. You'll have to do this at several temperatures to compare the curves.
     
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  11. Big Elf

    Big Elf Oh no! Not another f----ing elf!

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    Watercooling UK stock a range of them although they seem a bit pricey to me.
     
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  12. Bloody_Pete

    Bloody_Pete Technophile

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    Around £7 is about the right kind of price if its something decent.
     
  13. Goatee

    Goatee Well-Known Member

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  14. wyx087

    wyx087 Homeworld 3 is happening!!

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    The watercooling website doesn't actually say the resistive specification of them. My fan controller is probably out of production for years. It's mCubed T-Balancer BigNG.


    So following from @Goatee's post. I should be able to measure working sensors and get about 10k Ohms for room temperature. Then place finger on it to see resistance decrease. Then I'll go search for NTC 10k thin film sensor.

    Is there any variation with resistive range? Eg. some sensor at 1c measures 1100 Ohm but others measure at 1500 Ohm. What does values in this table mean?
    [​IMG]
     
  15. wyx087

    wyx087 Homeworld 3 is happening!!

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    I measured the 2 working sensors, imminently after turning computer off.
    The graphics card one, wedged in between heatpipe right next to GPU: 6.5k Ohms and rising.
    The sensor used to be HDD, now move to CPU duties, it's currently stuck on the VRM heatsink. It had 7.8k Ohms and rising.

    Rising resistive value would suggest falling temperature. I'd expect both to be higher than measured when settled at 25c room temperature. Therefore the sensor I'm looking for is a 10k Ohm NTC thin film temperature sensor.

    I'm going to order 10k Ohm version in this listing and simply replace the broken sensor with a new one. Reusing the wires.
    https://www.ebay.co.uk/itm/Thin-fil...710821?hash=item282fec5b25:g:63MAAOSwLIZeLJzu
     
  16. Nealieboyee

    Nealieboyee Packaging Master!

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    I think you're right about the values. Seems to point to a 10K sensor. The values in the table look like they're referring to the tolerance, which all resistors will have. 5% will give you a swing of around 500 ohms at 25 degrees C.
    Does the controller have a calibration function?
     
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  17. wyx087

    wyx087 Homeworld 3 is happening!!

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    Yes, the controller has calibration function. I also set fan curve, so incorrect value is not much of a problem.

    The broken sensor had resistance in Mega Ohms.

    That cheapo ebay part has been ordered. I'll update next week. Thank you all for valuable advice. :)
     

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