Wallace & Tiernan 65-120 Pressure Calibrator • A pressure-vacuum test stand with a precision pressure gauge, pressure connections, two air-regulator controls, and a selector valve. • Features a Ni-Span C, capsule-type pressure element for excellent temperature stability and speed of response. • Connection block has 1/8 inch female-pipe threaded connections, allowing small gauges to be threaded directly into the block or connected by flexible tubing. • Includes two sets of calibrations: -100 to 0 to 850 inches of water and -3.6 to 0 to 30.6 psi. • Heavy cast aluminum gauge housing with a tempered glass dial cover and built-in pressure-relief valve. • Portable, lightweight, and versatile, weighing only 20 lbs. • Calibration is traceable to primary standards and the National Institute of Standards and Technology. • Applications include calibrating pressure transmitters, gauges, indicators, recorders, differential pressure transmitters, ratio relays, and stacked diphragm pneumatic controllers.