Hall proximity switches Hall element is a magnetic element. Made use of the Hall element LB-M0824LB normally closed switch, called the Hall switch. When the magnetic objects closer to the Hall switch LB-M0824LB normally open, switch detection surface of the Hall element due to the Hall effect to generate the internal circuit leaving the switch state changes, thereby identifying the presence of magnetic objects nearby, then control switch on or off. This proximity switch detects objects must be magnetic objects. Other proximity switch when the observer or when the system is changed from the wave source, close to the frequency of the wave will be shifted D-Y7BWSDPC, a phenomenon known as the Doppler effect. Sonar and radar principle is the use made of this effect. Can be made using the Doppler effect of ultrasonic proximity switches, microwave proximity switch. When an object closer, the proximity switch receives the reflected signal will produce a Doppler shift, which can identify the presence or absence of an object approaching. JG40L-Z20AB | L | magnetic switch on China by the China Shenyang Electric Limited. JG40L-Z20AB | L | magnetic switch on the people on the people of Shenyang Electric Co., Ltd. (www.zsmsy.com) launched this new upgrade, the above picture is for reference only, please call the contact phone or pictures on this page, for the latest Information, Contact: Wei Song.