There are three types of P+F proximity switches

Create Date: 2024-8-30 12:03:23|Source: P+F/Double Blessing

P+F proximity switches can be divided into three varieties:

There are three types of P+F proximity switches

1. Capacitive proximity switch can detect metal and non-metal objects with an induction scale of 1-40mm

Capacitive proximity switches detect both metallic and non-metallic objects. contains liquids such as acids, water, and oils; There are also granular objects, which contain grains, flour and sugar. The detection of metal objects can obtain a large action interval, and the detection of non-metal objects depends on the dielectric constant of the data, the larger the dielectric constant of the data, the larger the action interval can be obtained.

Capacitive proximity switches come in several shapes, including cylindrical, flat mount, and Varikont, and most capacitive switches have a spiral potentiometer that can be used to adjust the switching spacing.

2. Inductive proximity switch can detect metal objects with an induction scale of 0.6-100mm

The inductive proximity switch can detect metal objects and is composed of three parts: 1. oscillator, 2. trigger circuit, 3. output circuit

When the power is turned on, the oscillator starts to oscillate and a specific current is generated. The electromagnetic field generated by the oscillation coil is concentrated on the sensing surface of the sensor, and when the target object made of conductive data approaches the sensing surface, eddy currents occur in the target object, which consumes the energy of the oscillator, resulting in the attenuation of the oscillator circuit, and the amplitude of the oscillator decreases.

3. Magnetic proximity switch can detect magnets (permanent magnets or electromagnets) and ferromagnets, with an induction scale of 25-80mm

Magnetic proximity switches have longer sensing intervals and smaller form factors than inductive proximity switches.

The standard magnetic proximity switch uses a full-core sensor, which has the advantage of higher sensitivity than Hall sensors and magnetoresistive sensors.

Magnetic proximity switches detect the presence of magnets (electromagnets and permanent magnets) or ferromagnets.

Magnetic proximity switches can be thoroughly encapsulated in a metal housing for inspection.

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