Dwyer Instruments Calibration Pumps Calibration pumps for testing and calibrating pressure instruments. Between hand pumps, calibration pumps, and low pressure calibration pumps, these products are used for leak check testing. There are pumps available that are not hand pumps SERIES PCHP PNEUMATIC CALIBRATION HAND PUMP SERIES HCHP HYDRAULIC CALIBRATION HAND PUMP SERIES BCHP LOW PRESSURE CALIBRATION PUMP MODEL LPCP LOW PRESSURE CALIBRATION PUMP MODEL A-396A CALIBRATION PUMP Contact for a quote