Sensor fargo

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  • Publicado : 9 de noviembre de 2010
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Capacitive NO/NC Selectable AC/DC Sensors
FEATURES
• • • • • • • • • • • NO/NC output selector switch AC/DC power supply Sensing of metallic and non-metallic objects Adjustable operating distanceCylindrical threaded metal or plastic casing Short circuit protection up to 50V in DC LED indication of the output logic status Cable and connector versions Protective housing available for mountinginto containers Compliant to the EMC directive RoHS Compliant

DESCRIPTION Capacitive sensors are used to detect metallic and non-metallic objects (liquid, plastic, wooden materials and so on). Thesecapacitive sensors have a normally open or normally closed output selector switch and operate on a wide voltage range, 20 - 250 V AC/DC. This greatly reduces the need to keep multiple sensors instock. Their housing consists of a cylindrical threaded metal or plastic 30 mm diameter case. They are dust and water tight as well as shock and vibration resistant. All models feature LED indication ofthe output status and short circuit protection up to 50V in DC. A screw placed on the sensor allows regulation of the operating distance. This sensitivity regulation is useful in applications, such asdetection of full containers and non-detection of empty containers. A waterproof protective housing is available. This housing is made of a non-toxic material (POM) and has a standard 1 1/2" GASthreaded fitting for mounting into a container. This housing permits a sensor to be rapidly removed for testing without the loss of material and protects the sensor from abrasion. The use of the housing canhelp to eliminate variation in the sensitivity of the sensor due to deposits of material. OPERATING PRINCIPLE Capacitive proximity sensors use the variation of the parasitic capacity that developsbetween the sensor and the object being detected. When the object is at a preset distance from the sen-sitive side of the sensor, an electronic circuit inside the sensor begins to oscillate. The rise...
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