Hi everyone,
Can I use a Thin Film Thermistor NTC 10K to detect changes in skin temperature? If not, or u have a better sensor to detect the small changes in temperature please share your opinion.
Thanks in advance
How many small changes? You can see the DS18B20 digital temperature sensors.
It might be possible but probably not very sensitive at all. NTC thermistors are designed to read temperatures in the range of hundreds of degrees, like in an oven or furnace, not for temperatures that vary only a few degrees around 37C. I agree with suggestion of ds18b20.
A thermistor with the right pull up resistor and a 10-bit A/D and smoothing code can just detect 0.1C difference. It could indeed be easier to use a connect_and_forget digital DS18B20. They have a 1/16 degreeC resolution, which means a 0.1C readout for humans. Your biggest issue might be the wires attached to the sensor, draining the heat away.
Leo..
Take a look at a PT100 or a PT1000 temperature sensor which would would be connected using kelvin techniques. The accuracy would be very good as would the stability and noise rejection.
Hi,
Is this subject the same as the topic?
" https://forum.arduino.cc/t/piezoelectric-sensor-for-detct-changes-on-skin-temperature/1061182/4 "
If so, please do not duplicate posts and
ask moderators to merge your 2 threads.