Submersible level sensor
Level Sensors
Level sensors are used to detect levels of substances that naturally flow to become level in whatever physical boundaries constrain it. This can include substances such as liquids, semi-liquids (e.g. slurries), or solids (e.g. granules or powders). Level sensors can detect continuous levels, measuring within a specified range to determine the specific amount of substance in a certain place. They can also measure at specific points, generally whether the substance is above or below the sensing point (excessively high or low).
Continuous measurement of liquids can use magnetostrictive level sensors, resistive chain level sensors, hydrostatic pressure level sensors and air bubbler level measurement systems. Sensors for point-level measurement of solids include vibrating sensors, rotating paddle sensors, mechanical sensors, microwave sensors, capacitance sensors, optical sensors and ultrasonic sensors. Sensors that can detect both point-level or continuous-level measurements of solids and liquids include capacitance sensors, optical interface level sensors, ultrasonic level sensors and microwave/radar sensors. The type of sensor used depends on the type of substance (i.e. liquid, semi-liquid, or solid), agitation or vibration, density, whether it must detect measurements in a vacuum or under pressure, the temperature, the type of container, the chemical composition of the substance, noise and so on.
Submersible level sensors
Hydrostatic submersible level sensors are used for measuring the level of corrosive liquids in deep tanks, such as the NivoPress NP that Semrad Pty Ltd offers. This level sensor consists of a probe and a breathing cable containting a capillary pipe (i.e. with a ver small diameter) and a stress resistant inlet. The probe is a stainless steel cartridge, suitable for clean or faintly chemically tainted liquids (whether in tanks or water reservoirs). Its main purpose is to monitor submerged pumps, as it is capable of fully functioning while immersed in water. Hydrostatic level sensors basically sense increasing pressure with depth (calibrated to the specific substance).