Installed in the lower cavity of the column to monitor the pressure in the lower cavity of the column. The technical parameters are as follows: Explosion protection type: mine physical safety type Protection class: IP68 Environment temperature: from -20°C to 60°C Working voltage: DC12V Working current: 20 mA Output signal: 0.5 - 1.5V Working pressure: 0 - 60 Mpa Accuracy: 0.5% (FS)