When obstructing the exhaust nozzles it is important

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Unformatted text preview: able. Pneumatic proximity sensors can be differentiated between back pressure sensors, reflex sensors and air barriers. Detectable distances range from 0 to 100 mm, see Fig. 8.1.1 A common requirement for the application of pneumatic sensors is to reduce the system air pressure to a low pressure range by means of pressure regulators. A supply of filtered, oil-free air is essential. As the pneumatic signal is generally too weak for further evaluation, a pressure amplifier needs to be connected downstream. A pneumatic proximity sensor with binary electrical output signals is created with the help of pneumatic-electric converters (pressure switches). When obstructing the exhaust nozzles, it is important to ensure that the amplifier is designed for any necessary increased pressure. When replacing pneumatic sensors, it is generally necessary to adjust the amplifier or threshold setting, due to discrepancies as a result of production tolerances. © Festo Didactic GmbH & Co. KG • FP 1110 119 8. Pneumatic proximity sensors 0 1 0,5 0 2 1 2 1 s [mm] 2 a) 4 1 15 5 2 1 2 1 s [mm] 2 b) 1 1 5 40 1 s [mm] 100 2 1 2 1 2 c) Supply pressure (1) Output pressure (signal pressure) (2) Sensing distance (s) a) Bac...
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This note was uploaded on 11/01/2012 for the course CHEMICAL 102 taught by Professor Jamesrodriguez during the Spring '12 term at Universidad Politécnica de Cartagena.

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