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Shenzhen Cian Electronics Co.,Ltd

Address: B Building, Weixin Industrial Park, ShiTouShan Industrial Zone, ShiYan Town, Baoan District, Shenzhen City, China

Tel: +86-755-29953144

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AC Proximity Switch

In production, a metal reed is inserted in each end of a glass tube and the end of the tube heated so that it seals around a shank portion on the reed. Green-colored Infrared-absorbing glass is frequently used, so an infrared heat source can concentrate the heat in the small...

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AC Proximity Switch

In production, a metal reed is inserted in each end of a glass tube and the end of the tube heated so that it seals around a shank portion on the reed. Green-colored Infrared-absorbing glass is frequently used, so an infrared heat source can concentrate the heat in the small sealing zone of the glass tube. The thermal coefficient of expansion of the glass material and metal parts must be similar to prevent breaking the glass-to-metal seal. The glass used must have a high electrical resistance and must not contain volatile components such as lead oxide and fluorides which can contaminate the contacts during the sealing operation. The leads of the switch must be handled carefully to prevent breaking the glass envelope. The glass envelope can be damaged if the reed switch is subjected to mechanical stress. AC Proximity Switch2303_副本.jpg

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THE CHARACTER OF PROXIMITY SWITCH

Among various types of switches, there is a component that has "feel" ability to approach its object - a displacement sensor. This is the proximity switch, which uses the proximity sensor's sensitivity to the proximity of the object to achieve the purpose of turning the switch on and off.

When there is an object moving towards the proximity switch and approaching a certain distance, the displacement sensor only has “perceived” and the switch will act. This distance is usually called the "checkout distance." However, different proximity switches detect different distances.

Sometimes the object to be inspected is moved one by one to the proximity switch and one by one at regular intervals, so that it repeats continuously. Different proximity switches have different response capabilities to detection objects. This response characteristic is called "response frequency".


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