NOR Coffee Roaster

Probe Sensor

NEW

21.10.2025

Coffee Knowledge

Coffee Machine

Coffee Roasting

NOR

Guide

Probe sensor BT & DT

The beans temperature probe sensor (BT) is located on the below the axis of the roasting drum and the drum temperature probe sensor (DT) is located on the above the axis. Both probes extend 5 cm into the Roest drum. The cables then run through a channel inside the machine housing to the respective display on the control panel.

Probe Sensor Calibration

Loosen the screws on the bracket that secures the cable to the front of the machine.
Widen the probe opening by pressing it open with pliers. This will allow you to move the sensor cable.
After reaching the set PID temperature when warming up the machine, calibrate the probe sensors so that the drum temperature (DT) is 10 to 20 °C higher than the temperature of the beans (BT).
If the DT temperature is too high, carefully pull the cable out a little. If the DT is too low, carefully push the cable in a little. If the DT cable cannot be pushed in any further, adjust the BT sensor by pulling the cable out slightly.
Once you have finished calibrating the probe sensors, use pliers to close the probe opening on the machine again so that the cable can no longer move.
Reattach the cable holder to fix the sensor cable. The cable should not be pulled too tight or kinked.

Probe Sensor Cable Replacement

Loosen the screws on the bracket that secures the cable to the front of the machine.
Widen the sensor entry cover at the entrance to the roasting drum by pressing it open with pliers. This will allow you to pull out the cable. Remove the protective cover as well.
Disconnect the old cable from the respective display (BT or DT) and connect it to the new cable using adhesive tape.
Then pull the old and new cable through the machine to the regarding opening (BT on left and DT on right side) in the front of the machine.
Pull the cable through the protective cover and then insert it into the sensor opening and follow the steps of the Sensor Probe Calibration.
Then use pliers to press the sensor opening on the machine closed again so that the cable can no longer move.
Reattach the cable holder to fix the sensor cable. The cable should not be pulled too tight or kinked.
You can then pull the excess cable back to control panel and stow it there.
Next, attach the new sensor cable to the respective display (positive and negative poles).
Check whether the sensor is functioning properly and whether the temperature is displayed on the respective display.