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  • 30/01/2016

    I have received 3 sensors, and set them up to compare to my Lab reference PT100. Found differences in resistance about 2.4 Ohms. And this translates to about 8 deg. of C - shift to the lower temperature. If using this sensor "as is" measured temperature of 21 deg. of C will be seen as 13 deg of C. (This problem also was reported by: tioted in 2015-07-29) To correct the problem, I have connected 2.4 Ohm 1% Metal Film resistor in series with the sensor. This corrected the problem but introduced some 2% of non linearity - which in most circuits is acceptable. If you are using MCU with PT100 Table in the memory, you can introduce the correction table, and solve the problem without any additional resistors - the elegant solution. This sensor price is 1/10 of the "perfect PT100" for the above reason of - it needs a little correction. Thanks Banggood.

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  • 23/06/2016

    I tested on my soldering iron and on room temperature. On soldering iron it is about 5°C off, but I am not sure whether soldering iron is accurate too. On room temperature, it is off by 2°C or less. Thanks.

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