The Handing Operating Pressure Pump is designed to be used in the industrial process for calibrating the pressure measuring instruments mounted in field and various pressure gauges installed in sure generator for the manufactures of the pressure instruments for calibrating work.and used for calibrating the pressure measuring instruments in field or work Y039 Measuring Rang: 0-1.6MPa,0-2.0MPa, Weight:0.5kg size: 220x110x55cm Y060 Measuring Rang: 0-25MPa, Weight:0.8kg size: 250x130x140cm Y061 Measuring Rang:-0.07--0MPa(-585～0mmHg) Weight:0.5kg size: 220x110x60cm