Smart level probes model SGE-25.Smart and SGE-25S.Smart Aplisens | Level Sensing Instrument | View PDF Programmable zero shift, range and damping ratio Measuring range: min. 0..0,8m WC; max 0..100m WC Output signal: 4...20 mA + HART protocol Accuracy: 0,1% Cr.: http://www.aplisens.com/