Alignment Sensors and Switches

4B's line of sensors and switches for detecting alignment and motion for bucket elevators, belt and drag chain conveyors, or screw conveyors.

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 relay contact. This relay contact is used to immediately alarm and shutdown the machine.

Brass rub blocks monitor for belt misalignment problems on bucket elevators and conveyors by detecting heat generated by the friction of the misaligning belt rubbing against the brass. A temperature sensor within the brass block provides the temperature reading and the system generates an alarm and a shutdown when a trip point is reached.

The WDA sensor is designed to detect a moving ferrous target. It can be used on bucket elevators to measure speed and alignment by sensing either the metal elevator buckets or the ferrous bolts attached to plastic buckets. A more specialized use for the WDA switch is as a broken/slack chain detector on drag chain conveyors, or as a non-contact speed switch for screw conveyors.