For testing, inspection or critical production processes. Hand & stationary pressure testers are protected with a stainless steel, liquid filled diaphragm. They also have a unique Min/Max memory function. They are recalibrated on a high accuracy dead weight tester. A serial number and certification of accuracy are supplied. (N.I.S.T. traceble) It is also supplied with an instrument toggle valve for pre-pressurizing. This gauge combines accuracy with rugged construction, accuracy + or - 0.25% of span. Valve adaptors are available under accessories. *Comes with brass toggle valve and test report, traceable to N.I.S.T. Rugged Plano lockable gun security, foam padded carry case, Also made in USA.