The HS721 Pneumatic Pressure Comparison Pump is a laboratory instrument that generates pressure from vacuum to 140 bar. It features a reverse valve, an F-adjust valve with a resolution of 10 Pa (0.1 mbar), and three outputs with fast fittings for efficient calibration of two pressure instruments simultaneously. A built-in gas-oil isolator protects the pump from oil impurities, reducing maintenance needs. The lever lead screw design makes operation easy and effortless.