Clarke-Hess Communication Research Corp. is a leader in precision test equipment manufacture. Clarke-Hess began in 1969 as an electronics test and measurement company. It specializes in applications relating to low frequency and direct current (DC) devices. Professionals who work in commercial and industrial firms, military agencies, and laboratories trust Clarke-Hess as their product manufacturer. The Clarke-Hess brand has acquired a stellar reputation through the years for its excellent products, outstanding performance, and great customer service. Clarke-Hess manufactures power analyzers, calibrators, data acquisition (DAQ) tools, current sources, amplifiers, and meters. You can trust ValueTronics.com for quality used and refurbished Clarke-Hess test equipment.