Ranges available from 16 PSI up to 5000 PSI with up to 10 selectable units of measure depending on the model. Electrical 0-55mA +/-0.025% of reading or 4-20mA as percentage 0-100%. Temperature compensated 0-50 Deg C and Exia intrinsically safe. Available with single or dual pressure sensors. Pressure is measured using highly repeatable silicon sensors protected by all welded and permanently filled stainless steel diaphragm seals. ATEX certified intrinsically safe. Battery Life - 90 hours typical (alkaline).