HPT-37 Floating Ball Level transmitter is composed of magnetic floating ball, measurement tube, signal unit, electronic unit, junction box and assembling parts. Generally, magnetic floating ball proportion is less than 0.5, so it can float on the liquid surface and move up and down along measurement tube. There is measurement element installed in tube. It can convert the measured liquid level signal to resistance signal proportional to liquid level changes under the  influence of external magnetic force. In addition, it also converts electronic unit into 4-20mA or other standard signals to output.  Widely used in all kinds of liquid level measurement, such as oil, water, sewage, such as acid, alkali liquid medium.