Level switches are devices used to detect the presence of liquids and other materials in tanks and silos. They are commonly used in the food and beverage, oil and gas, pharmaceuticals and water treatment industries. There are two main types of level switches: float-type and displacement-type. When the liquid level reaches a certain point, float-type level switches use a bouncing object such as a ball or bubble to activate a switch. Displacement-type level switches use a weighted object, such as a chain or cable, to actuate the switch when the material level reaches a certain point. level switch It can be used to measure both high and low levels and monitor leaks.
Different types of level switches in use today
Level switches detect the level of liquids or solids within a container. are various type of level switch In use today, each with its own unique advantages and disadvantages.
The most common types of level switches in use today
- float switch consist of Of a float that is attached to an armored cable. The float rises and falls with the level of the liquid, and this movement is used to trigger the switch. Float switches are simple and reliable, but they can be damaged by debris in the liquid.
- ultrasonic level switch Emit sound waves that are reflected off the surface of the liquid. The time it takes for the sound waves to return to the sensor determines the level of the liquid. Ultrasonic level switches are very precise, but they can be obstructed by air bubbles or foam on the surface of the liquid.
- conductivity level switch rely on the fact that most liquids are good conductors of electricity. An electrode is immersed in a liquid, and as the level of the liquid rises and falls, so does the conductivity between the electrode and the ground reference. Conductivity level switches are cheap and easy to install, but they only work with fluids that conduct electricity well.
- tuning fork type level switch A piezo-crystal assembly, typically a tuning fork switch, drives a two-pronged fork to oscillate at its inherent frequency. Typically, a flange or threaded process connection is used to install the switch on the side or top of a tank such that forks are affixed to the tank.
These are some of the different types of level switches in use today. Each has its own strengths and weaknesses, so choose the one that best meets your needs.
Please contact scientific instruments If you need to know more about Level Switches.