Established in 1983, QSI Corporation is a manufacturer of rugged operator interface and mobile data terminals for industrial OEMs and commercial vehicle systems integrators. QSIs human machine interface (HMI) and mobile ......Established in 1983, QSI Corporation is a manufacturer of rugged operator interface and mobile data terminals for industrial OEMs and commercial vehicle systems integrators. QSIs human machine interface (HMI) and mobile data terminal (MDT) products include character and graphic terminals that are programmable, customizable, CE certified, and NEMA 4/12/13 rated. Numerous interfaces are available, including EIA-232, EIA-422, EIA-485, J1708, Ethernet and Power-over-Ethernet. Our terminals withstand high levels of shock, vibration, humidity, and other environmental conditions. We offer a complete line of terminals with many configurable hardware options. We can also build custom terminals to match your exact needs. At QSI we strive for excellence in every aspect of our business. Our leadership team brings decades of diverse experience and knowledge to the departments they manage. QSI products are designed for use around the world, and therefore are designed using SI metric measurements and metric components wherever possible.