GLI International is located in Milwaukee, Wisconsin and is a Viridor Instrumentation company. Incorporated in 1970, the company's innovative products include the patented differential pH sensor, which revolutionized pH measurement and has become the industry standard for demanding process applications. GLI offers a complete line of pH, contacting conductivity, resistivity monitors, electrodeless conductivity, dissolved oxygen, flow, level, and turbidity systems. The GLI name has become synonymous with Quality in the drinking water, wastewater and process control industries.
