The SensoREX pH/ORP Transmitter Simulator is a handheld device for testing and calibrating pH/ORP instruments. It features a large LCD display, membrane keypad, and operates on 4 AA batteries. The simulator ranges from -1500mV to +1500mV and 0 to 14 pH, with accuracy of ±0.1% FS mV and ±0.02 pH. It can source/sink up to 20mA and has adjustable output impedance from 0-1000 Ohms. It includes automatic buffer recognition and temperature compensation. The device comes with a carrying case, batteries, pH buffers, and electrode cleaning solution, enabling quick and easy testing without chemical reagents.