Level Technologies

Frequency Shift Capacitance Level Sensors

Principles of Operation Capacitance level technology uses the electrical characteristics of a capacitor (a device that has the potential to store an electric charge). Typically a capacitor has two conductors or electrodes separated by a layer of a non-conducting material called a dielectric. In capacitive level measurement, the environment (typically the vessel wall) acts as a reference electrode and the sensor...


Ultrasonic Level Sensors

Principle of Operation Ultrasonic level sensors work by emitting an ultrasonic sound pulse several times per second from the base of the transducer. The pulse travels through air, reflects against the process medium below and returns to the transducer. The sensor measures the pulse time of flight between sound generation and receipt, and translates this into distance or liquid level height within the vessel....


Electromechanical Level Sensors

Electromechanical level sensor technology utilises a simple paddle switch to detect levels of bulk solids. Advantages of Electromechanical Level Sensors Proven paddle switch technology for bulk solids Easy to install Limitations of Electromechanical Level Sensors Limited application Only point level...


Hydrostatic Level Sensor

Principles of Operation A hydrostatic level sensor is a submersible or externally mounted pressure sensor that determines level by measuring pressure above it, which increases with depth. From this measurement, together with knowledge of the liquid’s density / specific gravity, it is possible calculate the liquid level above the sensor in the vessel. Temperature compensation will take into account changes in...


Radar Level Sensor / Transmitter

Radar Level / Sensor Transmitter Advantages Non-Contact continuous level measurement Can be applied to a variety of materials including solids, liquids, and slurries Unaffected by environmental conditions such as humidity, vapours, temperature fluctuations, pressure, dust, foaming surfaces etc. Accuracy unaffected by changes in material viscosity, density or acidity etc. Radar Level / Sensor Transmitter Limitations...


Vibrating Tuning Fork Level Sensor

Principles of Operation A rod sensor or tuning fork level sensor is excited piezo-electrically and vibrates at its resonant frequency. The frequency changes when the fork enters/leaves the medium and this change is detected and converted into a switching command. Advantages of Vibrating Tuning Fork Level Switches Reliable point level switching Set up without adjustment to medium High repeat accuracy Mounting...


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