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Industries that deal with liquid, whether dairy, gas and oil, food and beverage, and other sectors, depend on special sensors to monitor and track liquid levels and changes. Known as a liquid level detector, this device can also identify a particular type of substance in a tank or another container.
As a valuable tool, companies can choose from a range of detectors. Each water level detector sensor works differently. The following represent the most common water level detector sensor options available:
- Capacitive Liquid Level Sensor – This particular liquid level detector has switches that use two conductive electrodes. When immersed in a liquid, they complete a circuit. A key advantage of this detector is that it can determine a rising or falling liquid level. Also, it has no moving parts. However, if the electrodes corrode, the sensor must have a thorough cleaning and go through recalibration.
- Conductive Liquid Level Sensor – The switches on this water level detector sensor have two or more insulated electrodes with exposed tips. These tips go into a pipe, which is then lowered into the liquid. However, this sensor only works for specific liquids. Another limitation is its tips require regular cleaning.
- Diaphragm Liquid Level Sensor – In this case, the continuous level sensor uses air pressure to push a diaphragm. That engages a micro-switch located on the interior portion of the body. As liquid levels rise, so does the internal pressure in a detecting pipe. The pressure continues to increase until it activates the micro-switch. For falling water, the reverse occurs. As air pressure decreases, the micro-switch disengages.
- On a positive note, this liquid level detector doesn’t require a power source inside the tank or vessel. The downside is that as a mechanical device, it needs regular maintenance.
- Float Liquid Level Sensor – As the original kind of water level detector sensor, the float is also mechanical. It can measure virtually any kind of liquid. Again, as a mechanical device, it doesn’t require a power source. However, this is quite large and requires regular maintenance.
- Optical Sensor – An optical sensor utilizes both a phototransistor and infra-fed LED. The good thing about this continuous level sensor is that it can detect both a liquid’s presence and absence. Also, this sensor isn’t affected by foam, small bubbles, or even ambient light. Although a lot of companies prefer this particular type of sensor, it has limitations. In other words, all it can do is measure the presence or absence of liquid.
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To learn more about each type of water level detector sensor or get information about our high-tech products, contact us at Introtek International. We look forward to serving you as a valued customer.
