Built for automotive, HVAC, laboratory, and general industrial applications, the HHP91 manometer is compatible with air as well as non-corrosive and non-ionized gases and liquids. The HHP91 is said to provide easy-to-see readings displayed in digits 15 mm high. Features include auto off (after approximately 20 minutes), reading hold/min/max, pushbutton recall, and a built-in tilt stand. The manometer also includes a built-in sensor with dual inputs for gage and differential measurements. Thanks to its eight selectable pressure ranges, the device is compatible with all measuring systems.