100 GPM Hydraulic Flow Meter Tests hydraulic oil circuits on your machinery with high accuracy and measures flow from 2.5 to 100 gpm. Flow Accuracy to +/- 1 percent of indicated value and Pressure accuracy of +/- 1.6 percent of full scale. Pressure range up to 6,000 psi and Temperatures up to 250 deg F. Standard burst disc protection system prevents spillage of hydraulic fluid in the event of an overpressure condition. Accommodates bi-directional flow, reads flow in both directions, pressure on the high side of valve and Port is 1-5/16 -12UN #16 SAE ORB 4278 No -