The SensoREX pH/ORP Transmitter Simulator is a handheld device that simulates pH and ORP transmitters for testing and calibrating pH/ORP instruments. It features a large LCD display, intuitive menu-driven interface, and generates stable pH/ORP signals from 0-14 pH and -1000 to +1000 mV. The simulator allows the user to adjust pH/ORP values in 0.01 pH and 1 mV increments and can source/sink up to 20mA. It comes with a 9V battery, protective rubber boot, and hard carrying case. The SensoREX simulator is useful for verifying proper operation of pH/ORP transmitters, controllers, recorders, and analyzers in industrial, municipal, and lab settings.