HSM-20G sensor module temperature reading

[nafisnuzrin]

Hye, Im using HSM-20G analog sensor module to read the temperature. My project connecting the WSN 3202 node with the sensor to receive the analog voltage and convert to temp, but the datasheet only provide graph temperature vs resistance only. So when I receving the data in voltage reading, how to convert to temperature? any idea?

[GerdW]

Hi nafisnuzrin,

the data you present look like the description of a NTC thermistor.

Unfortunately you don't show the full documentation so I guess the 100kOhm resistor between temp output and GND in your schematic is used to form a voltage divider: using this voltage divider you can get a voltage signal instead of the resistor change…

[nafisnuzrin]

I provide the datasheet file, the circuit from datasheet show the resistor for temperature output is 10k ohm.

[GerdW]

Hi nafisnuzrin,

so the full datasheet doesn't provide any more substantial information - you may ask the manufacturer for details!

I still guess it uses a voltage divider with the temperature output - so just recreate this electronic schematic and measure the voltage over this 10kOhm shunt…

[nafisnuzrin]

orait thanks for helping