Why Is The Level Sensor Optical The First Choice?

- Nov 29, 2019-

The level sensor optical is a switch for detecting when a liquid reaches a predetermined level. In addition to the horizontal and vertical configuration of the float switch, ultrasonic sensors and optical sensors can perform point level monitoring of liquids within the range.

Integrating these with additional output connections makes it possible to communicate measurement points with a control or alarm system. So why choose a photoelectric level switch instead of a traditional level switch?

As we all know, the level sensor optical is designed to detect the presence of liquid at a specific point. Photoelectric level switches are often used to control low or high liquid levels in fuel tanks or containers to prevent equipment damage, liquid spillage, loss of valuable liquids or abnormal interruption of equipment. The EPTSensor photoelectric liquid level switch series designed with this kind of working principle has extremely high accuracy and repeatability in the process of liquid level position monitoring. The repeatability of the central monitoring liquid interface is as high as ± 1mm. Let ’s talk about photoelectric level switches-why they are the first choice for traditional level switches.

Disadvantages of traditional level switches

Regardless of whether the switch used for level measurement is a vertical float switch or a horizontal float switch, reliability problems and short service life may occur. A typical floating-point level switch requires full contact with the fluid before the signal is recorded and action is taken. This may be sufficient for limited applications, but more accurate and robust level measurement solutions are often required in different industries.



Level sensor optical


The main component of a photoelectric level switch is a wear-resistant polymer or glass head with an infrared (IR) light source and an optical detector. When the tip is in the air, infrared light is reflected to the inside of the sensor tip and is reflected to the optical detector. In contrast, when immersed in liquid, this infrared light is refracted from the tip, and the optical signal is weakened.