Now available - WDA4 Motion Alignment Sensor
The WDA4 is a non-contacting high-power, extended range magnetic proximity sensor, for alignment and motion detection on bucket elevators and conveyors
4B have just launched the upgraded version of the WDA, the WDA4, now with the ability to reverse the state of the continuous output (normally energised or normally de-energised). This sensor is a great choice for measuring speed and alignment on bucket elevators and on other applications such as using the WDA switch as broken/slack chain detector on drag chain conveyors or as a non-contact speed switch for screw conveyors.
The WDA4 supersedes the WDA3 – meaning that the WDA3 is no longer ATEX approved. The WDA4 complies with the latest ATEX and IECEx certification but is not currently CSA approved.
The WDA4 is a non-contacting high-power, extended range magnetic proximity sensor, not affected by dust or material build up, used to detect moving ferrous material up to 75mm away from the sensor.
The sensor is designed for use with bucket elevators to detect the buckets in order to measure speed and alignment. It can also detect screw conveyor flights, and ferrous bolts when attached to non-ferrous buckets. A more specialized use of the WDA sensor is for broken/slack chain detection.
The WDA4 is used in conjunction with a PLC or with 4B’s Watchdog™ Elite or A400 Elite control units. Two output signals are provided: one signal is a pulse output, representing each bucket detected: the second signal is a continuous output when moving buckets are detected. The continues output can be wired normally energized or normally de-energized.
