Working principle of optical Type level Switch
Optical level Switch Working principle is given below. Basically the optical level switch has many uses, especially in a wide range of machines to determine high or low levels of various fluids.The advantages of an optical level switch typically include their compact size, high reliability and relatively low cost.
Working Principle: An optical level switch works by emitting a beam of infrared light within a prism and measuring the amount of light received. When the measured fluid reaches the sensor the amount of emitted light received drops thus triggering the contacts. As the sensor is detecting the state between material covering or not covering the prism it can be used to detect the presence or absence of fluid.
The compact unit houses the infrared transmitter, the prism, the receiver and the electronics; there is also an external LED indicator to show the condition of the switch. The sensor requires a power supply of between 10-28 Volts Dc. The benefit of the modern optical sensor is that there are no moving parts that can retain material and get clogged up or damaged, simply fit and forget.