peeyushsigma
Member level 4
- Joined
- Apr 15, 2012
- Messages
- 77
- Helped
- 19
- Reputation
- 38
- Reaction score
- 17
- Trophy points
- 1,288
- Location
- Bengaluru, Karnataka, India
- Activity points
- 1,773
You possibly may get more error from
thermal resistance to heat source.
Have you not learned yet to do a tolerance stackup?
You can get pretty accurate thermistors for not a lot of money. For example: https://www.littelfuse.com/~/media/...rmistors_ultra_precision_pr_datasheet.pdf.pdf
However, you also have to consider the intrinsic non-linearity of the device, as well as the tolerances of your application circuit.
Analog components have tolerances that in the set give a total characteristic tolerance on the circuit larger than the value of each one individually, so without analysis of the circuit the question is vague, but intuitively the answer is: No. Another fact to consider is that the nominal value of these components varies with temperature, and therefore if the whole circuit is subjected to the temperature to be measured, this will add an extra uncertainty to the circuit. In short, if you want bigger accuracy, you should consider a digital solution, either in the sensor (which often come pre-calibrated from factory) or in the conversion, as this turn more reliable the calibration result.If I use linearisation circuit for overcoming the non linearity of NTC in short range say 50 degree C then, can they be production ready without any calibration ?
If I use linearisation circuit for overcoming the non linearity of NTC in short range say 50 degree C then, can they be production ready without any calibration ?
. If you want a device that is absolute, you may use a band-gap device. But they are voltage devices.
Can you please suggest any band gap device for the same purpose..I just want avoid calibrating all the sensor in production.
i suggest you get some basic idea from the article; **broken link removed**
One of them perhaps can meet your requirements.
So my question is what are you measuring?
K type thermocouple for our multimeter this cost just few dollars
He will never answer that, for now he is taking advantage of this forum for getting ideas supposedly cutting costs in some sort of production line, that it could be his own bedroom room.
.
So my question is what are you measuring? A temperature on a PCB? A chassis? A dangling temperature sensor at the end of a cable?
Your response to the previous question implies you're not measuring a PCB.
An LM35 in a thru hole package would be pretty versatile. It can be PCB mounted and glued to a thing its sensing. Or it could be manufactured (carefully) into a cable assembly for longer distance remote sensing.
https://www.digikey.com/product-detail/en/texas-instruments/LM35CAZ-NOPB/LM35CAZ-NOPB-ND/148180
We use cookies and similar technologies for the following purposes:
Do you accept cookies and these technologies?
We use cookies and similar technologies for the following purposes:
Do you accept cookies and these technologies?