Capacitive Oil Level Sensor Circuit

The tube electrodes are isolated from each other using a molded rytontm insulator.

Capacitive oil level sensor circuit.

Designed and developed to measure oil level reliably in extreme operating conditions. 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. Our solid state capacitive liquid level sensors are suitable for monitoring fuel level oil level water and coolant level as well as other liquids. Capacitive oil level sensors reventec oil level sensors use capacitive technology to measure oil level accurately.

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. When the tube starts to fill more and more of the space will be occupied by water. International association of oil gas. Since εr water εr air the capacitance of the sensor can be approximated by the capacitance of the submerged section.

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. Thus the level of the liquid can be calculated as c 1 c 2. Each oil level sensor is manufactured to the required mechanical specification. When the tube is empty the space is occupied by air.

The capacitance level sensor produces a dc current signal proportional to fluid level when excited with 20 vac at 30 khz. In the most basic sense capacitors store electrostatic energy in an electric field. A second pair of capacitive sensors shown as c 2 is used as a reference. Level is the length submerged into liquid.

Figure capacitance level sensor calibration. Two concentric aluminum tubes along the length of the sensor form a variable capacitance circuit. The space between the tubes is the dielectric. When functioning as level sensors capacitors work by processing capacitance with reference to the dielectric.

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. 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. Proven in motorsport defence and industrial applications the sensors are solid state with no moving parts. 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.

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.