The Dwyer BCHP1 Low Pressure Calibration Test Pump is able to generate 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-1 can be used in laboratories and production areas. The fine adjustment valve on this pump ensures precise measurements.