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very sensitive temperature sensor
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very sensitive temperature sensor

by DCSoutherner on Sat Jan 12, 2019 9:59 am

I'd like some advice on choosing a very sensitive (accurate) temperature sensor with rapid response. The ideal sensitivity would be in the .1 degree (F) range.
The sensor will be used in an indoor environment in the 32-90 degree (F) range and should use an I2C or SPI interface.
Rapid response to a temperature change (.25 second or so) is ideal but needs to be within .5 second.
I'll be writing the code to communicate with a Xilinx Zynq Ultrascale+ MPSOC so I don't care if it talks to Arduino/Raspberry Pi/etc.
Your recommendations are welcome.
Thanks!

DCSoutherner
 
Posts: 7
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Re: very sensitive temperature sensor

by adafruit_support_bill on Sat Jan 12, 2019 11:11 am

We carry the MCP9808 which has a resolution of +/-0.0625°C. (+/- 0.1125 F):
https://www.adafruit.com/product/1782

We also carry platinum RTDs and an RTD amplifier capable of resolving 0.03125°C (.05625 F):
https://www.adafruit.com/product/3648
https://www.adafruit.com/product/3984

Minimizing response time is a combination of minimizing the thermal mass of the sensor and maximizing thermal conductivity between the sensor and what is being measured.

As with any sensor, maximum accuracy is achieved via calibration: https://learn.adafruit.com/calibrating- ... -calibrate

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Re: very sensitive temperature sensor

by DCSoutherner on Sun Jan 13, 2019 1:31 pm

Thanks, that is just what I needed.

DCSoutherner
 
Posts: 7
Joined: Thu Dec 27, 2018 2:06 pm

Please be positive and constructive with your questions and comments.