Features of a Capacitance Level Sensor
A capacitance level sensor is one of the two types of proximity level switches (the other is inductive). Capacitance sensors detect both metallic and non-metallic targets, which make them highly versatile for many different applications. Capacitance sensors also have a wide range of sensing, which provides many benefits to the user.
Most capacitance sensors have a few issues that make then unsuitable to use in every level-sensing application. One difficulty with the sensor is that it is difficult to shield. This makes the sensor nearly impossible to use in flush-mounted systems. It is also necessary to ensure that multiple capacitance sensors are not placed too close together, as this can mess up the readings and damage the sensors. Another drawback of the sensor is that it is sensitive to RFI exposure and can often give unwanted readings due to the sensitivity of the detection system.
Despite the potential drawbacks of a capacitance level sensor, it has many uses in a variety of applications. The sensors are ideal for using inside large containers to detect the level of a liquid or substance inside the tank. Sealed tanks are best, where there is no chance of the sensor detecting unwanted targets. You can also easily use this kind of sensor to detect the level of powdered inside hoppers, tanks, or containers.
In general, capacitance sensors are best for detecting the level of non-metal materials and targets, while inductive sensors are best for detecting metallic materials. Capacitance sensors can also detect metal, but are often too sensitive to use in these applications. If you follow this general rule when selecting a level sensor, you will see fewer problems with your sensors and can remain confident in the accuracy of the readings that each sensor type gives you.