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ntc thermistor accuracy

Thread starter #1
I need accurate sensor, 0.2 degree is critical. could the 10k NTC do this?​

this is its specs.​

ntc is 10k and Koefficient B (25 C/50 C): 3950
Accuracy: ±1%
Temp. Range -40 C to 200 C​




 

crutschow

Well-Known Member
Most Helpful Member
#7
If you want that kind of accuracy over that temperature range, than an RTD, as KISS mentioned, would likely be the best.
But you will also need careful design to meet that accuracy.

Do you have a way to calibrate it?
 
Thread starter #10
I need to read a range from 35 to 39 with accuracy and repeatability or at least accuracy. I need it accurate to 0.2 degree.
 

Nigel Goodwin

Super Moderator
Most Helpful Member
#11
I need to read a range from 35 to 39 with accuracy and repeatability or at least accuracy. I need it accurate to 0.2 degree.
How are you planning calibrating it to 0.2 degrees?, you will also have to calibrate it across the entire range as it's not linear, and use a lookup table to convert the readings. Repeatability is much more likely than accuracy.

I'm somewhat dubious about getting 0.2 degrees accuracy?, would 0.5 degrees not do? - if so you could use the DS18B20 which requires no calibration.
 

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