what is a rotary switch？

The rotary switch can be used to replace the rotary pulse generator with the analog function of the traditional resistive potentiometer. These rotary switches are usually used in the front panel of the instrument and the man-machine interface of the audio-visual control panel. The rotary switch uses an orthogonal optical encoder as a substitute for the analog potentiometer. A pure digital device, these rotary switches look similar to traditional or resistive potentiometers in appearance, but the internal construction of these rotary switches is completely digital and uses optical technology. Similar to traditional incremental encoder products, there are two quadrature output signals (channel A and channel B), which can be directly connected to the encoder processing chip. Rotary switches are mainly installed on liquid and gas pipelines to adjust the flow and pressure of liquid and gas. When in use, turn the handle to drive the adjustment nut to rotate, connect the left-handed thread with the left-handed thread of the valve, and drive the valve to move to the right or left to change the cross-sectional area of the right hole passage in the valve body cavity, thereby adjusting the flow of liquid and gas in the upper outlet pipeline. size of flow and pressure. The rotary switch is a switch that controls the on-off of the main contact by rotating the handle. There are also two structural forms of the rotary switch, which are unipolar unit structure and multi-pole multi-position structure. The unipolar unit rotary switch is often used together with the rotary shaft potentiometer in the application, while the multi-pole multi-position rotary switch is mostly used for switching the working state circuit.