Feb 22 2011
Haydon Kerk Motion Solutions., a producer of linear motion devices, has introduced an embedded end-of-stroke proximity sensor to its 1-inch 25000 range of captive linear actuators.
Haydon's Proximity Sensor
The device features the compact Hall Effect technology incorporated into an IC package that is fixed on the actuator.
The solution offers a continuous on-off life cycle caused by the non-contact working of the switch. The solution is suitable for space constrained applications. An earth magnet fixed to the end of the internal screw makes for repeated on-off feature without the component having to be replaced regularly. When the screw goes in and out the actuator, it causes the magnet to constantly move toward and away from the sensing device. This results in the device changing from digital on to off mode with the help of an open-collector output via an embedded NPN transistor switch. The switch has three wires and operates from 3.8 to 24 VDC using a current consumption of 10mA.
The device features include maximum stator tooth geometry, high energy neodymium magnets, customized polymers, and large ball bearings for enhanced rotor support and axial loading.
Source: http://www.HaydonKerk.com/