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Thread: Temperature datalogger questions

  1. #1
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    Temperature datalogger questions

    Gene Cafe Coffee Roaster $850 - Free Beans Free Freight
    A couple of questions on this QM1538 datalogger thing..
    1. I take it you use to measure roast temps, I use a popper (CP) for roasting, from previous posts, I will need to drill a small hole to insert the probe in. Do I insert the probe in all the way (dont even know how long the probe is) so it obstructs the beans, or does it only have to go in slightly?
    2. How accurate is it in the lower temps? I was thinking of using it to measure the steamed milk to calibrate my milk thermometer.
    3. How do I use it to measure brew temp on the silvia?

  2. #2
    CoffeeSnobs Owner Andy's Avatar
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    Re: Temperature datalogger questions


    1. The probe works best if it is in the beans. How you do that is up to you. In a popper with a can on it I would drill a hole in the can.

    2. Pretty accurate and far better than your milk thermometer.

    3. Stick a foam cup over the group-head and stick the probe into the cup.

    The probe is about 7cm long, you can see it at the bottom of the picture in BeanBay.

    http://beanbay.coffeesnobs.com.au/ViewProduct.aspx?ID=162

    Only the last few milimeters (maybe 4mm) do the actual work.

  3. #3
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    Re: Temperature datalogger questions

    I drilled a small hole on the side of both of my poppers for a thermocouple. I wanted it to be just above the vanes where hot air exits. This ensures the thermocouple is in the bean mass. Id say the TC is about 2cm inside the roasting chamber, slightly offset from centre.

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    CoffeeSnobs Owner Andy's Avatar
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    Re: Temperature datalogger questions


    ...after ensuring that there were no electrical wires in the drill area of course!

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    Re: Temperature datalogger questions

    Behmor Brazen - $249 - Free Freight
    Drilled a pilot hole first, so I could see inside. On the side with the switch, there was only the ground lead anywhere near the hole.

    In restrospect, I should have drilled a slightly larger pilot hole, because trying to fit a centre punch through was a tad bit difficult.



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