a distant shot of an operating factory

Common Types of Level Sensing Methods

The term level sensing method refers to a set of methods used by operators to detect leaks and other issues in related industries, including food and beverages, cosmetics, printing, chemicals, and other sectors where exact measurement is a crucial point. Over the years, manufacturers have experimented with several types of sensing methods that they can present the most updated version of the sensors. The solid level sensor is one example. It is used to measure the number of solids in a container without having to have direct contact with the material inside the container. Operators have been dependent on technology since it offers easy and accurate ways to measure the materials.

The above explanation highlights one vital fact that many different types of sensors are available in the market. It is surprising to see that one industry prefers to use one type of sensor and ignore others since many of them offer similar features. However, it is vital to note that each of the product has different characteristics, and these differences have significant impacts on the entire process. This article discusses several common types of sensing methods widely used in industries.

Optical Switches

It is one of the most common types that operators use widely since it offers easy and simple use. The sensor consists of an LED detector and a phototransistor. When the sensor is hanging in the air, the light from the LED is sent back to the detector, sending signals that the sensor does not touch the materials inside the container. However, once the sensor reaches the liquid, the light is refracted out of the sensor, draining its energy to go back to the detector. This type of sensor makes the best option, especially when reliability and practicality are essential. This device can detect leaks, preventing further damages. The device is also suitable for tanks and containers of any sizes.


Ultrasonic detectors are one of the latest types of sensing detectors used in companies that deal a lot with liquid. Just like what its name suggests, the device uses high-frequency sound waves to measure the materials. The device measures the materials by calculating the duration of the waves from the moment it is reflected off to the surface to the moment it goes back to the detector. One plus point of this device is that it has no moving parts, making it highly practical for pretty much any materials. However, this device is also known to be expensive.