Photoelectric switches are members of a large family of sensors that convert the change in intensity between the transmitting and receiving ends into a change in current for detection purposes. Since the photoelectric switch output circuit and the input circuit are electrically isolated (ie, electrically isolated), it can be used in many applications.
A new generation of photoelectric switching devices fabricated using integrated circuit technology and SMT surface mount technology, with intelligent functions such as delay, broadening, external synchronization, mutual interference resistance, high reliability, stable working area and self-diagnosis. This novel photoelectric switch is an active photoelectric detection system type electronic switch using pulse modulation. The cold light source used is infrared light, red light, green light and blue light, which can be non-contact and quickly without damage. And control the state and action of various solids, liquids, transparent bodies, black bodies, soft bodies and smoke. The contact type travel switch has the disadvantages of low response speed, poor precision, easy detection of damage to the object to be detected and short life, and the proximity of the transistor proximity switch is short, and it is not possible to directly detect non-metallic materials. However, the new photoelectric switches overcome their above-mentioned shortcomings, and have small size, many functions, long life, high precision, fast response, long detection distance and strong resistance to light, electricity and magnetic interference.
This new type of photoelectric switch has been used for level detection, liquid level control, product counting, width discrimination, speed detection, fixed length cutting, hole identification, signal delay, automatic door sensing, color mark detection, punching and Shearing machines and safety protection and many other fields. In addition, the use of infrared concealment can also be used as a burglar alarm in banks, warehouses, shops, offices and other places where it is needed.