The input type level transmitter is based on principle of measuring hydrostatic level proportional to the height of liquid level, transfer the static pressure into electrical signal by use of proliferation of silicon or ceramic capacitors sensitive components, after temperature compensation and linearity correction, convert it into 4-20 mA DC standard current signal output. The sensor part of the input type level transmitter can be put directly into medium, the transmitter part can fix by flange and bracket, the installation is very convenient.