are rotary resistors with extremely low torque. They differ from limit value switches in that they supply a continuous signal proportional to the measured value of the measuring instrument. This signal can be used for display, recording, monitoring, control, regulation and remote monitoring.

Output i.e.:
0 – 100 Ohms, 50 – 30 – 50 Ohms or 5 – 100 – 5 Ohms