For different materials and different detection distance, different types of proximity switches should be selected in order to make it in the system has a high performance price ratio, for this in the selection should follow the following principles:
1.1. When the testing body for metal materials, should be selected high-frequency oscillating type proximity switch, the type of proximity switch to the iron and nickel, A3 steel detection of the most sensitive.
For aluminum, brass and stainless steel test body, its detection sensitivity is low.
1.2. When the testing body is non-metallic materials, such as wood, paper, plastic, glass and water, should be selected with capacitive proximity switch.
1.3. Metal body and non-metallic to carry out long-distance detection and control, should be selected photoelectric proximity switch or ultrasonic type proximity switch.
1.4. For testing body for metal, if the detection sensitivity is not high, you can choose low-cost Magnetic proximity switch or hall-type proximity switch.