Dual range digital manometer: 1.999 and 19.99 ranges. "The Omega HHP-100A Digital Air Pressure Gauge is a unit designed for industrial applications. It is a single unit digital gauge used for measuring air pressure. This specialized tool is essential for industrial settings to accurately monitor and maintain air pressure in various systems and equipment. With its digital display, the Omega HHP-100A provides precise readings for ensuring optimal performance and safety in industrial environments. Made in England. Comes with working unit & 2 lengths of tubing.