Turck is now offering Amphibian inductive proximity sensors, new liquid-sealed devices that consistently provide reliable sensing performance in extreme environmental conditions. They offer durability to withstand high-pressure, high-temperature wlashdown in repeated wet cleaning operations, as well as resisting cooling lubricants and oils present in heavy machining operations.
The sensors' rugged construction includes stainless steel housings, with special PVDF front caps and Viton O-rings to resist the harshest environmental conditions such as liquid ingress and chemical attack, including aggressive detergents. Primary applications for these devices include sensing in manufacturing operations in the food and beverage, brewing, pulp and paper and pharmaceutical industries.
The temperature range of the new sensors has bgeen increased to 85°C to resist thermal effects. The sensing range has also been increased allowing the sesnros to be positioned further away from the process and out of harm's way to reduce physical damage of targest striking the sensors. Sensing distances range from 3 to 7 mm depending on model. Higher front cap pressure ratings are 2 MPa (20 bar) for 12 mm sensors, 1,5 MPa (15 bar) for 18 mm sensors and 1 MPa (10 bar) for 30 mm sensors.
Amphibian sensors meet high environmental protection ratings including IP68 anhd Turck's more stringent IP69K definition. This includes hot steam jet cleaning per EN 60529 and DIN 40050-9 where the sensor is subjected to 80°C spray at 8,6 to 10 MPa (86 to 100 bar) directly on the sensor, at a range of 100 to 150 mm in 30° angle increments for 30 s each, for a total of 120 s. Other test procedures include heating the sensors to 85°C, storing the sensors in fluid for three days and retesting.
The sensors are also tested in a wide variety of fluids. Detergents include 3% soda lye (caustic), 4% KSM 93 (pH 9,2) and perchlorethylene (PERC). Grinding and cutting oils include Megacut S and Megacut 22 (made by Daw Aerocit). Coolants tested include Karol (pH9,1) and Aerolan 2400 (pH9.0).
Amphibian sensors are available in 12, 18 and 30 mm barrel housings in both PNP and NPN models, with prewired or quick disconnect cable. Prewired models are available with insulating plastic sleeve connections for additional cable protection.
Turck is a leading supplier of advanced sensing solutions to help manufacturers improve their automated processes, products and profits.
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