Submersible Level Sensor The Simple Choice For Tank Level Monitoring
When used to determine the level of a liquid, submersible level sensors function by monitoring the hydrostatic pressure of the liquid. The pressure that is exerted by a liquid at a specific position as a result of the weight of the liquid above that point is referred to as hydrostatic pressure. This difference in pressure is proportional to the height of the liquid that is contained within the tank. The pressure that is experienced at the bottom of a tank is higher than the pressure that is experienced at the top.
A pressure transducer and an electronic circuit make up the submersible level sensor. The pressure transducer is responsible for converting the hydrostatic pressure into an electrical signal, while the electronic circuit is responsible for amplifying and processing the signal. A cable normally connects the sensor to the control unit, and this cable goes in the opposite direction from the sensor. The submersible level sensor is submerged in the liquid, and the cable that connects the two components is hermetically sealed to prevent liquid from entering.
A piezoresistive or capacitance-based sensing diaphragm is utilised by the submersible level sensor in order to acquire an accurate reading of the hydrostatic pressure. In reaction to shifts in the surrounding pressure, a piezoresistive submersible level sensor will alter the electrical resistance it presents. In reaction to shifts in pressure, the capacitance that exists between the electrodes of a submersible capacitance-based level sensor can shift as well. After that, the variations in resistance or capacitance are transformed into an electrical signal, which can further be processed and transformed into an output signal of 4-20mA.
The output signal of 4-20mA is a common type of industrial signal that is typically utilised for the transmission of information across considerable distances. The signal consists of a current loop that is always running and is proportional to the level that is being measured. The value of 4 mA indicates the lowest possible level, while the value of 20 mA indicates the highest possible level. The signal is received by the control unit, which then transforms it into a digital reading. This reading can either be displayed on a panel or transmitted to a control system.
In a nutshell, in order to detect the level of a liquid, submersible level sensors function by monitoring the hydrostatic pressure of the liquid. They include a pressure transducer, an electrical circuit, and a cable that is attached to the control unit in some configuration. A piezoresistive or capacitance-based sensing diaphragm is used by the submersible level sensor in order to measure the hydrostatic pressure. The sensor then sends out a 4-20mA signal that is proportionate to the amount of liquid that is present.
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