These non-contact sensors, which were specially developed for handling systems, detect the conveyed object from between the rollers. The detection signal is evaluated in the logic unit and the electropneumatic cylinder is actuated via the valve. Use of these sensors for accumulating conveyor systems do not have the need for additional control elements.

WTR 1 / WTR 2:
- "3 in 1"
- Proximity sensor
- Logic for roller conveyors
- Magnet valve

WLR 1:
- "3 in 1"
- Special reflex sensor
- Logic for roller conveyors
- Magnet valve

ZLM 1-B:
- Logic module
- Magnet valve
- Can be combined with suitable optoelectronic or inductive sensor from SICK