Inductive sensors for extreme temperatures
January 2016
Temperature Measurement
The Wenglor INRT inductive sensors ensure reliable detection of metallic objects in extreme temperature ranges. With three series and 12 models, the product portfolio covers a comprehensive range of temperatures from -60 to +450°C.
The rugged sensors are reliable, high-performance products that have application in a broad range of industries: from automotive and metalworking to food and glass industries. Securing and monitoring hot zones is a central application for these new sensors – whether cathodic dip painting of cars parts, manufacturing of ceramic components such as brake calipers, spark plugs and catalytic converters, or in the production of tiles and glass. As the sensors are manufactured without silicon they can be used in PWIS-sensitive areas. Cold zone applications include cold storage facilities used by the food industry for refrigeration and deep freezing.
The top range INRT450 is a frontrunner where resistance to heat and cold is concerned. With a working range from -60 to +450°C and a switching distance of 25 mm, the sensor masters demanding tasks. This is made possible by spatial separation of the evaluation unit and the sensor head, as well as cable lengths of 5 to 20 metres. The sensor head is made of ceramic to withstand extreme hot and cold conditions. As example, at an ambient temperature of 450°C the sensor has a service life of 100 000 hours (around 11 years).
Also within the product lineup are the INTT25 and INTT40 models, which are equipped with a sensing distance of either 25 or 40 mm, and are designed for zones within a range of -10 to +250°C. The Teflon sensor head withstands an ambient temperature of 250°C for an impressive 60 000 hours.
All models include a patented maintenance output which draws prompt attention to repair cycles to prevent costly system downtime. The extended switching distances of 25 to 40 mm can be selected easily and conveniently with a potentiometer. The sensor heads are quick and simple to replace.
For more information contact Anastas Schnippenkotter, ASSTech Process Electronics & Instrumentation, +27 (0)11 708 9200, [email protected], www.asstech.co.za
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