Three types of liquid level sensor

1, buoy type liquid level transmitter

buoy type liquid level transmitter is change the magnetic float to buoy, liquid level sensor was designed according to the principle of Archimedes. Buoy type liquid level transmitter is to use small metal film strain sensor technology to measure the liquid level, the position, or density, it can be done in the scene button at work regular set operation.

2, ball float transfeeder ball float liquid level transmitter ducts, the signal is measured by the magnetic floating ball, unit, the electronic unit, junction box and install, generally less than 5, the proportion of magnetic floating ball can float on the surface and move up and down along the measuring tube, intraductal equipped with measuring element, it can will be under outer magnetic liquid level measurement signal is proportional to the resistance of the liquid level change signal, and converting electronic unit 4 ~ 20 ma, or other standard signal output.

liquid level sensor module circuit, has the advantages of acid, moisture, shock, anti-corrosion, internal circuit has permanently within the current feedback circuit and protect circuit, can make the output current is not more than 28 biggest ma, it can be reliably protect power and secondary instrument is not damaged.

3, static pressure type fluid shift delivering

the transmitter using hydrostatic pressure measuring principle of work, it usually use silicon pressure measured by pressure sensor will be converted to electrical signals, then through amplifying circuit amplification compensation and compensation circuit, and finally to 4 ~ 20 ma output or 0 ~ 10 ma current way.

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key words: thermal resistance, thermocouple, thermal resistance, platinum resistance, PT100, PT1000, pressure sensor and digital temperature sensor