External Thermostat for Resun CL-650

[oceanviper]

Hi bro....
Recently got this thermostat ( 10K at 25degC ) from SLT.
After connected to the chiller, the display temperature is only half of the actual value.
I'm suspecting this diff is due to the resistance of the thermostat.
If I'm using a 5k at 25degC, i should be getting closer display value to my actual temperature.

Please kindly help to comments.

Thanks.

[Shadow]

you need to be carefull there is 2 type of thermistor NTC and PTC. As you can see from the graph, PTC resistance increase when the temp increases. NTC the other way around.

[oceanviper]

Hi bro....
Thanks for the comments.
I'm aware of that.

Just that now need to see whether any DIY gurus using external thermo sensor for the CL650 which presently my chiller display readings 1/2 the actual value.

Thanks.

[Shadow]

measure the resistance original sensor at know temperature. Then measure your new sensor at the same temperature. If the new sensor resistance lower, you can add resistor in series to compensate.

[Wahlin]

you need to be carefull there is 2 type of thermistor NTC and PTC. As you can see from the graph, PTC resistance increase when the temp increases. NTC the other way around.

Just to add more info:

NTC = Negative Temperature Coefficient
PTC = Positive Temperature Coefficient

[oceanviper]

Already done that in the first place.
Which why i need to confirm with the gurus here anyone have an external thermostat brand & shop to get to use with resun chiller CL-650.