This preview shows page 1. Sign up to view the full content.
Unformatted text preview: sender), an
excess pressure builds up in the central nozzle (receiver nozzle) when the object is
at a certain distance from the ring jet. Fig. 8.3.1 provides a schematic representation
of the air flow. 1 2 Supply pressure (1) 1 2 Output pressure (signal pressure) (2) Fig. 8.3.1: Method of operation of a reflex sensor The reflection of the air jet on an object to be detected creates a signal pressure
build-up in the control port relative to the sensing distance and supply pressure.
The reflex sensor is typical of this design. A reflex sensor generally consists of a
sender and receiver nozzle arranged concentrically. A constant air jet is emitted by
The approach of an object towards the reflex sensor influences this air jet and a back
pressure (reflex) builds up in the receiver nozzle, which can be evaluated as a signal
Alternative designation: Reflex nozzle 122 © Festo Didactic GmbH & Co. KG • FP 1110 8. Pneumatic proximity sensors 8.4
Air barriers By placing a ring jet nozzle directl...
View Full Document
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.
- Spring '12