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 switches automatically fulfils the principle of accumulating conveyor systems without the need for additional control elements.

WTR1 / WTR2:
- "3 in 1"
- Proximity switch
- Logic for roller conveyors
- Magnet valve

WLR1:
- "3 in 1"
- Special reflex switch
- Logic for roller conveyors
- Magnet valve

ZLM1-B:
- Logic module
- Magnet valve
- Can be combined with suitable optoelectronic or inductive sensor from SICK