The Dwyer BCHPKIT Low Pressure Calibration Test Pump with 1/4 in NPT Connections, Fine Volume Adjustment Tool, and Case is a complete kit for generating pressure and vacuum for adjusting or calibrating pressure gauges, transmitters, or switches. The pump is hand operated and has a pneumatic pressure range of -28 in Hg to 870 psi (-0.95 bar to 60 bar). Dual pressure ports allow two instruments to be connected to the pump without additional fittings. The BCHP-KIT can be used in laboratories and production areas. The fine adjustment valve on this pump ensures precise measurements.