How to: Sensing against the elements

How to select proximity sensors that resist everything from caustic wash downs to weld slag. Proximity sensors have become more and more sophisticated as well as more reliable and rugged with IP-rated and sealed housings and other features. This lets them withstand some of the harshest industrial environments. For example, the current generation of sensors can handle exposure to cleansers, chemicals, extreme temperatures and weld fields while delivering accurate results. Here are just a few examples of how you can minimize downtime from sensor failures and lengthen the time between replacements by taking advantage of the latest proximity sensor designs. Authored by Tony Udelhoven Director of Sensors Div. Turck Minneapolis, Minn. Edited by Stephen J. Mraz • Proximity sensors can survive in tough environments • Find the sensor that matches your application • IP ratings are a good place to start Proximity sensors are often used in the food and beverage industries for inspection and to verify a package or product is on a conveyor or bottling and canning line. These sensors are placed in damp or humid environments where there's a chance water might get in and ruin it. And much of the equipment in these applications, including sensors, undergo frequent wash