What are the elements of selection, how to choose the travel limit switch.

There are many types of travel limit switches, but the function of the center is to control the circuit on and off, and the operating principle is similar

Now let's choose a suitable travel limit switch

1: First according to the planning requirements to choose the switch contact method, the switch is normally open, normally closed, an open and a closed type, and an open and a closed common terminal type, two open and two closed type, two open and three closed type, four open and four closed type, etc., we most commonly use the four terminals an open and a closed independent separation type and an open and a closed common terminal type, this should be selected according to the planning requirements

2: Look at the rated current rated voltage, the vast majority of limit switches are suitable for conventional environments, and there are also very special environments that require high voltage and high current.

3: Look at the use environment. Look at the environment of the site, temperature, humidity, corrosion, and special gases, etc., can choose high temperature resistance, low temperature resistance, waterproof, oil proof, corrosion prevention, explosion proof, etc., according to the site environment to see which type is more suitable for field use

4: Look at the action method of the product. The travel limit switch has rocker arm type, plunger type, universal type and transverse plunger type

Rocker arm type has high sensitivity and conventional sensitivity, divided into fixed rocker arm type, adjustable rocker arm type, and adjustable stainless steel rod type

Plunger type is divided into plunger type, roller plunger type and steel ball plunger type

The universal type is divided into plastic rod type (half spring half plastic rod) spring rod type (all spring) stainless steel rod type (half spring half stainless steel rod) needle type (half spring half steel needle) according to the scene environment to see which type is more suitable for field use

5: Look at the installation scale. The requirements of the above four points are different, and the installation scale is not the same, so choose a suitable installation scale

6: When many products can meet the planning needs, look at the cost performance, according to their own requirements for the switch to choose, for example, the switch is very important, if it is broken will affect the equipment, personal safety, or the switch is broken is not easy to repair, planning a longer service life, choose a higher price of the high-end type, if the switch requirements are not high, Can choose the relatively low cost