These are often used for air conditioners, water lines, and other places where they can get damp. The PVC coating of the wires is good up to 105 °C so this isn’t good for very hot stuff.
We even toss in an additional 1% 10K resistor which you can use as calibration or for a resistor divider.
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Would this work for the chumby hacker board LiPo sense line?
mills, anything with pvc-covered wire will have a 105 degree max usage. Its a property of PVC not of the thermistor 🙁 we are working on getting a teflon-wired temp sensor so you can measure up to 250 degC
tz, good question. depends on what the processor’s looking for in terms of the resistance levels. you’d have to compare what the cutoff resistances are to the table (there is no ‘standard’ thermistor)
hey email me if anyone needs a function fit (a mathematical function) for the look up table!
pinopoom [at] gmail.com
rei, that would be cool, please post it here. would save us some matlabbin 🙂
From wikipedia I pulled this equation:
where rinf=R0 e^(-B/T0)
This thermistor has a B value of 3950, R0=10^4 and T0=298.15