Amprobe - Amprobe Test Tools began in the late 1940's with its first patented product the Clamp-on Ammeter. Throughout these last 60 years, the Amprobe name has become synonymous with clamp-on meters and has since expanded its product offering to over 250 items. +More Becoming an established leader in quality test equipment for professionals in the electrical, maintenance, construction, and HVAC markets. Amprobe today offers a wide range of test equipment, as a preferred choice of professionals. Feature-rich products that include clamp-on ammeters, complete line of multimeters, HVAC measurement tools, power quality analyzers, electrical testers and wire/circuit tracers. Amprobe has expanded its focus to become a specialist in Power Quality (PQ) equipment, offering a full range of sophisticated equipment for field measuring and recording of PQ variables such as power, energy, harmonics, spikes, sags and surges. -Less