A level switch is a device that detects the presence or absence of fluid when a certain predefined level is reached. For the most part, they work as an on/off switch to engage a function when the tank or vessel level either rises or falls to a certain level. This could be to sound an alarm or to engage a piece of equipment. Essentially, the switch detects when the liquid has reached the desired point and it acts as a switch to activate the necessary response.
A continuous level sensor is required when it is necessary to measure every possible intermediate level of a tank or vessel, otherwise known as continuous level measurement. This means the sensor provides feedback regardless of the level of the liquid.
A level switch is generally intended for processes where high or low levels need to be monitored. Preventing overfills, run dry situations and leaks.
A continuous level sensor relay the exact level of fluid to be monitored. Ideally suited for processes where increased precision is necessary and for applications where knowing the level is important.
In addition to distinguishing between a continuous level sensor or point level switch, there are several environmental factors that can determine which type of sensor will work best for the application. Factors such as:
Even although most level sensor technologies fit into these two main categories (continuous level sensors or point level switches) there are many different types of devices to choose from within each category, suitable for the never-ending list of applications.
Examples of Point Level Switches are listed below:
Examples of Continuous Level Sensors are listed below:
Optical Point Level Switches from SST Sensing
SST Sensing are one of the world leaders in optical level sensing technology. PST supply an extensive range of optical sensors which we have massive success in sectors as varied as food and beverage processing, off high-way vehicle fuel and coolant level monitoring, leak detection in telecom and automation equipment.
If you would like more information about using one of our advanced optical level switches in your application, please do not hesitate to contact us directly.