Description of the difference between SCHMERSAL limit switch and proximity switch

The difference between SCHMERSAL limit switch and proximity switch
We all know that there are many products of Schmersal, such as SCHMERSAL safety switch, SCHMERSAL limit switch, SCHMERSAL safety sensor, SCHMERSAL emergency stop rope switch, SCHMERSAL safety photoelectric switch, SCHMERSAL foot switch, SCHMERSAL safety control module, automatic fail-safe Delay, safety relay module, SCHMERSAL proximity proximity switch, Schmersal reed switch, S-rotor worm limit switch, SCHMERSAL rope switch, loose rope switch, SCHMERSAL deviation switch, SCHMERSAL cam switch, micro switch, SCHMERSAL axis Angle encoder, SCHMERSAL reed switch, SCHMERSAL safety position switch, SCHMERSAL emergency stop rope switch, SCHMERSAL safety monitoring module, SCHMERSAL safety switch for hinged door, SCHMERSAL elevator switch, SCHMERSAL reed switch, SCHMERSAL safety position switch, SCHMERSAL Layer precise switch, SCHMERSAL proximity switch, etc. Today we mainly introduce the difference between SCHMERSAL limit switch and proximity switch. I hope that after reading our introduction, we can better understand the difference between them.
Both SCHMERSAL limit switches and proximity switches are switches commonly used in the equipment industry and have different options depending on the site. Let's compare their advantages and disadvantages:
SCHMERSAL proximity switch: The object is detected by means of the eddy current generated in the metal body of the detection object caused by electromagnetic induction without touching the detection object. For example, HTL-Q05N1E of HWL uses this principle to detect the ferromagnetic object and detect the distance. 5MM, 10-30vdc power supply.
The advantages are: 1, non-contact, so it will not wear and damage the object to be detected. 2, the use of contactless output mode, so the life is extended, the use of NPN / PNP output, no impact on the life of the joint. 3 is not affected by the object's stains and oil, water, etc., only ferromagnetic induction. 4, high-speed response up to 3KHZ
The disadvantages of the SCHMERSAL proximity switch are: 1. There is a significant difference in the detection distance depending on the material of the object to be inspected. Generally, the detection object is a non-magnetic metal (such as aluminum), and the detection distance becomes smaller.
2. Mutual interference refers to the influence of the magnetic (or electrostatic capacity) of the adjacent sensor, and the output is in an unstable state.
3. When the proximity sensor is OFF, there is a small amount of current leakage due to the operation of the circuit. Therefore, a small amount of current (load residual voltage) remains in the load, and the load is not properly reset.
Introduce the advantages and disadvantages of the SCHMERSAL proximity switch. Let's take a look at the advantages and disadvantages of the SCHMERSAL limit switch.
The SCHMERSAL limit switch is a contact switch that uses the mechanical opening and closing of the contacts to realize the function of the switch. For example SL1-A, single contact limit switch, LDVS-5204 is a 2-contact limit switch, LDVS-5414 is a 4 contact
Advantages of SCHMERSAL limit switch: 1 Regardless of the material, as long as the operating force of the contact reaches a certain value, the switch is started.
2. Using the contact output mode, the output can be different with the external voltage, no leakage phenomenon.
3. The output is stable without being affected by adjacent sensors.
SCHMERSAL limit switch Disadvantages: 1 contact type, so it will wear and damage the object to be detected. This method is not recommended for precision objects.
2, contact type, mechanical life is limited.