Proximity switch, also known as contactless stroke switch, in addition to complete stroke control and limit protection, it is also a non-contact detection device, used to detect part size and speed measurement, etc., can also be used for frequency conversion counter, frequency conversion pulse generator, liquid level control and automatic connection of processing programs.

It is characterized by reliable operation, long life, low power consumption, high repositioning accuracy, high operating frequency and adaptability to harsh working environment.

1, the main use of proximity switch

Proximity switches are widely used in aviation, aviation, aerospace technology and industrial production. In daily life, such as the automatic doors of hotels, restaurants, garages, automatic hot air machines have applications. In terms of security and anti-theft, such as data archives, accounting, finance, museums, vaults and other major places are usually equipped with anti-theft devices composed of various proximity switches. In measuring techniques, such as the measurement of length and position; In the control technology, such as displacement, speed, acceleration measurement and control, also use a large number of proximity switches.

2, proximity switch selection precautions

In general industrial production sites, eddy current proximity switches and capacitive proximity switches are usually used. Because these two proximity switches have lower environmental requirements. When the object under test is a conductive object or an object that can be fixed on a metal object, the eddy current proximity switch is generally selected because of its high response frequency, good resistance to environmental interference, wide range of applications, and low price. If the measured object is non-metal (or metal), liquid level height, powder height, plastic, tobacco, etc. Capacitive proximity switch should be used. This switch has low response frequency but good stability. Environmental factors should be considered during installation. If the object is a magnetic conductive material or the magnetic steel is buried in the object under test in order to distinguish the object moving with it, the Hall proximity switch should be selected, and its price is the lowest.