Temperature Sensor Identification WRNT-02

alexus

hi
i got this sensor but it gives me trouble (wanted to use it for heat bed)
https://www.amazon.com/WRNT‑02-K-Type-Thermocouple-Temperature-Measuring/dp/B09BZGXYWF

i measured resistance looks like 10 Ohm when i use that for config it shows 30C +/- which seamed ok room temp 24C but fine... i tried to heat up bed and temp did not change

any ideas? or just give up and get PT1000 or something

M308 S1 P"bedtemp" Y"thermistor" T8 B4138 ; configure sensor 1 as for heatbed
M950 H1 C"bedheat" T1                          ; create bed heater output on bedheat and map it to sensor 1
M307 H1 B0 S1.00                               ; disable bang-bang mode for the bed heater and set PWM limit
M140 H1                                        ; map heated bed to heater 1
M143 H1 S120                                   ; set temperature limit for heater 1 to 120C

jens55

@alexus, what you have there is a thermocouple and not a thermistor. Apples and monkeys ....

alexus

@jens55
monkeys eat apples, seams logical
tehre is no termocouple in the list of options, should i use linear-analog?

jens55

@alexus, I have no idea where you found "linear-analog" .... get a PT1000 probe (or thermocouple if you really want one of those) and save yourself some grief.
As far as I know, you can't use a thermocouple directly.

droftarts

@alexus it’s a K-type thermocouple. To connect it to Duet, you need a thermocouple board. This is the one we sell: https://docs.duet3d.com/Duet3D_hardware/Accessories/Thermocouple_Daughterboard

For temperature sensors connected directly to the Duet, use a thermistor or PT1000. See https://docs.duet3d.com/en/User_manual/Connecting_hardware/Temperature_choosing

Ian