This document describes a digital manganic pressure gauge product for clean rooms. It has an 8-digit LED display, measures absolute and differential pressure with programmable units and resolution, and has user-set limits and alarms for pressure violations. It connects to PCs via RS-485 or wireless and uses MODBUS RTU, proprietary, or BMS protocols. It is powered by 90-260V AC or 12-24V DC and is compatible with any OS and FDA regulations.