Capacitive Oil Level Sensor Circuit

Designed and developed to measure oil level reliably in extreme operating conditions.

Capacitive oil level sensor circuit.

The space between the tubes is the dielectric. The tube electrodes are isolated from each other using a molded rytontm insulator. Figure capacitance level sensor calibration. Capacitive oil level sensors reventec oil level sensors use capacitive technology to measure oil level accurately.

How it works and how to make a capacitive water or fluid level sensor for your fish tank water collection oil or fuel tanks cutting oil in machine tools. When the tube starts to fill more and more of the space will be occupied by water. The capacitor s ability to store this energy a measurement known as capacitance increases as the voltage is applied to the circuit and as the volume of insulating material increases. A second pair of capacitive sensors shown as c 2 is used as a reference.

Thus the level of the liquid can be calculated as c 1 c 2. A capacitive liquid sponsor relies on the fact the the capacitance or charge between 2 metal plates will change in this case increase depending on what material is between them. Our solid state capacitive liquid level sensors are suitable for monitoring fuel level oil level water and coolant level as well as other liquids. All products are manufactured to suit the intended application whether using one of our standard designs manufactured to length or a fully bespoke sensor designed specifically for the application.

International association of oil gas. Capacitance units will calculate automatically the capacitance variation image based in the factory calibration for a conductivity 100 μs cm. The capacitive level sensor has the 2 conducting plates in the form of 2 electrically isolated aluminium tubes a smaller tube in a larger tube. Proven in motorsport defence and industrial applications the sensors are solid state with no moving parts.

The capacitance level sensor produces a dc current signal proportional to fluid level when excited with 20 vac at 30 khz. The optomax industrial glass range is the ideal solution for applications such as power generation equipment off highway vehicles generators food and beverage medical rail hvac and coolant monitoring. Since εr water εr air the capacitance of the sensor can be approximated by the capacitance of the submerged section. This allows us to create a level sensor that is safe for use with any liquid this one will be used in a buggy with gasoline petrol.

Level is the length submerged into liquid. Each oil level sensor is manufactured to the required mechanical specification. Two concentric aluminum tubes along the length of the sensor form a variable capacitance circuit. The level capacitance can be simulated by entering the low and high level values.

When functioning as level sensors capacitors work by processing capacitance with reference to the dielectric.