How do you measure the level of liquid in a contained space that’s flowing freely and in some cases too hot or dangerous to come in contact with?

The answer is –  Level Sensors. Using a magnet and reed, the most basic sensors can monitor liquid levels through the activation of switches that activate alarm about too much or too little liquid present in the container. But don’t let their simplicity fool you. Level sensors aren’t just loved because of their cost sensibility, they are also vital to operations in industries across the globe. They don’t just measure the presence of a medium in a container, but also the absence. These low-level warnings and can even detect leaks before dangerous situations occur. This accuracy and dependability keeps businesses successful and the public safe.

Liquid measurement and monitoring are so important in fact, that new devices and technologies continue to incorporate the sensors in them as a way to deliver important data to and from advanced machines.

Depending on the type of process materials being measured, different sensor types can be used.

Two options for how to handle materials are typically chosen from – contact or non-contact measurement. This is based on various factors from the density to the temperature of the material being measured and whether or not there are sanitary requirements. As the name indicates, a contact measurement method would be the sensor located inside the vessel itself and able to come in contact with the material being measured without putting the project at risk. A non-contact method would include a sensor mounted to the outside of the tank.

Here is a break down of the different types of sensors offered by SMD Fluid Controls.

Contact Sensors:

Float Switches – These are the most commonly used devices for level measurement and utilize magnetic floats and reed relays to measure liquid medium.

 UltrasonicThese options are great for point level measurement of liquid and work by measuring the timing and speed of sound waves.

Optical SwitchesThese sensors have built-in electronics and work with no moving parts. They can perform point level sensing and pressure sensing up to 2500 psi.

Submersible Tank Level Sensor – These are a versatile option that can gauge tank levels by the hydrostatic pressure and offer stable and continuous measurement from depths up to 211 meters.

Non-Contact Sensors:

Ultrasonic Radar – This option uses radio waves to measure levels and is best for highly viscous or difficult liquid media that must be measured in real-time. Our ultrasonic sensors are made from 316 stainless steel and have a temperature maximum of 90°C with pressures up to 5,000 PSI in custom configurations.

Load CellsThis non-contact method of measurement is typically used outside of a tank to measure its contents by weight and may be suitable when non-contact with materials being measured is required.

Ready to order? Have questions?

Whether you need a prefabricated float switch or a custom-designed liquid level sensor, we can help! Our full OEM services are available whatever your industry and whatever your needs! 


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