Series 44S300 Pressure Calibrators

A pressure calibrator enables a technician to test the output of differential pressure (flow) readings of a pneumatic instrumentwith one hand while allowing the other hand to make calibration adjustments on the instrument being tested. Pressure accurate to ±1 is registered on the gauge, and locked in by means of a check-valve thumb screw. The thumb screw can then be used to relieve the pressure, in order to check range span by stopping at precise points on the gauge.

The calibrator consists of a sphygomanometer type (blood pressure) precision gauge with a squeeze bulb for applying pressure manually and a precision-machined hand-adjusted valve to hold and relieve the calibrating pressure. A flexible hose and a 3/16" tube - 1/2" NPT compression fitting is supplied for quick and easy connection to unit being tested. The calibrator weighs only 8 oz. as compared to 3 or more pounds for equipment marketed in kit form or one made up by the technician from parts.