(ELECTRICAL APPARATUS FOR EXPLOSIVE GAS ATMOSPHERES) This precision portable hand pressure tester can be used as a pressure tester or vacuum tester. It has a diaphragm seal so no product can get into the gauge. Accuracy in psi +/-0.05% of F.S. In vacuum +/-0.1% of F.S. Large 5 1/2 digit LED readout Auto shut-off. Reads out in 20 different engineering units. Automatically compensates for temperature variations . Fitted with a toggle valve for pre-pressurizing. Takes the place of 2 gauges in the aerosol lab or for production. Data output capability. Built very rugged with a rubber shock absorbing jacket.*Comes with brass toggle valve and test report, traceable to N.I.S.T. Rugged Plano lockable gun security, foam padded carry case, Made in USA. Gauge made in Denmark.