Touchswitch

The
Touchswitch is an electro-mechanical limit switch with no moving parts,
which detects tracking and misalignment problems on bucket elevators
and conveyors. When a belt misaligns or a pulley moves over and contacts
the sensor, the built in solid-state electronic circuitry detects the
lateral force of the belt or pulley and activates a voltage free solid
state relay output. This output signal is used to immediately alarm and
ultimately shutdown the machine.

The face of the sensor is made from hardened and annealed stainless
steel, not soft brass or aluminium, so wear life is longer when a belt
contacts it. The Touchswitch is not affected by dust or material build
up and will still work when completely covered by material. An external
test wheel allows for quick and simple sensor/system testing. The
sensors are usually installed in pairs on opposite sides of the machine.
The sensors can be connected directly to a PLC input, or for greater
safety, to a central independent monitoring system, such as Watchdog
Super Elite, IE-Node or the T500 Hotbus system.