Control vacuum pressure from 0 to 760 torr (mm Hg) to ±1 torr with needle valve. With digital setting and display (display accuracy: 0.3% of range). When connected between the vacuum source and the laboratory equipment, the controller compares the measured pressure to the desired pressure and then adjusts the pressure as required. Resists all organic solvents, acids, and bases. All wetted parts are 100% stainless steel. No mercury is used. Suitable for regulating the pressure in rotary evaporators and similar laboratory applications. Includes built-in stainless steel vacuum sensor and stainless steel vacuum solenoid valve. Choose from the stainless steel needle valve to limit the rate of evacuation of small pieces of equipment or the precision needle valve for small volumes under 1 liter. Warranty: 6 months. 120 volt.