Product Description HX7620W Pneumatic Comparator consists of lead screw, F-adjust valve, relieve valve and output interface. It features high sealing, stable pressure generating and simple operation. It provides pressure for calibrating pressure (differential pressure) transmitter, precision pressure gauge, general pressure gauge and other pressure instruments. Characteristics . Portable structure, small space and light weight . It is suitable for using in the laboratory and fieldwork . High pressure generating range and vacuum degree . Wide micro-adjusting range, high stability Technical Specification . Pressure Range: (-0.3~0.3) bar . Working Media: Air . Output Interface: M20×1.5 Female . Dimensions (L×W×H): 290mm×220mm×160mm . Weight: 3.2Kg