Jumo 401015 Series Column Level Indicator Level Probe, 2 Wire, 4 to 20 mA Output, Vertical/Hanging From The Cable,

The JUMO MAERA level probe is used for the continuous hydrostatic level measurement of liquids. It's output current is 4 mA to 20 mA two wired. G 1/4 inside proccess connection. Input relative pressure is 0 to 0.6 bar.

Level probe for continual level measurement in liquids
measuring ranges 0.25 bar to 1 bar
medium temperature 0 to 50 °C
piezo resistive silicon sensor
accuracy: 0.3% MSP2 sensor technology proven thousands of times over
reverse-polarity protection mechanism