Pneumatic proximity sensors can be actuated by means of a magnetic field, they have been designed typically for use in detecting pneumatic cylinder intermediate or end stroke positions, pneumatic proximity sensors can additionally be used for the contactless sensing of iron (Fe) parts within similar applications.
The pneumatic proximity sensor is essentially a 3/2 way normally closed valve, a pneumatic output signal is generated upon the presence of an opposing magnetic field or ferrous part, three switching directions are possible up to a maximum distance of 3.1 ± 1mm at 6 bar, you can determine the operating distance and hysteresis of the pneumatic proximity sensor for other directions by experiment. The active switching surface of the pneumatic proximity sensor is marked with a white dot to assist the set up and successful operation of the device.
A pneumatic output can easily be identified via a blue shrouded pop-up indicator sited on top of the pneumatic proximity switch. The underside of the proximity sensor is profiled, designed to fit 8mm to 100mm diameter round body cylinders, the minimum flux density on the face of the proximity sensor must be at least 7 mT (millitesla).
The pressure rating of the device is 2 to 6 bar - we recommend oil free, clean, dry, 5 micron filtered air. Tensioning straps (order code 33.006) are available to hold the sensor in place whilst the switch is mounted on cylinders, and additionally an M4 thread passing through the body can also be utilised should your application require alternative mounting options.
A small piece of foam is supplied with each proximity switch; this should be placed on the underside of the sensor to prevent unwanted ferrous material accidentally triggering the device.
Here’s a short video showing the operation of our pneumatic ‘Proximity’ sensors being used in conjunction with a ‘Totalising’ pneumatic counter, a pneumatic preset counter and pneumatic ‘Clock Face’ timers. Other useful videos are available through our YouTube channel. Visit our online shop for stock and pricing information.
Pneumatic proximity sensors are normally available from stock, we offer direct replacements for all other major brands, please ask for further information.