A handheld-sized, single-hand-holdable, single-hand-operable battery-powered digital backflow prevention assembly testing gage capable of measuring a differential pressure between high and low side fluid sources, providing a capture value function for easily recording pressure values while continuing display of live pressure measurements, and providing a rate of change graph display for immediate visual indication of changes in the differential pressure being sensed. The design utilizes a true differential pressure sensor for more accurate measurements, provides for use as a 5-valve, 3-valve, or 2-valve tester conforming to standard industry field testing procedures, and permits wireless transmission of measurement and related data as well as remote wireless calibration of the testing device.

Gilbert Lemke

Papers

Fluid flow meter