Hanna Instruments is the largest independent manufacturer of electrochemistry products in the world. These products include meters for the measurement of pH, conductivity, total dissolved solids, dissolved oxygen, temperature, humidity, and colorimeters for a host of specific ions. As an innovator with many firsts, including the first microprocessor-based handheld pH meter, we believe in controlling the quality of our products from inception to delivery. To ensure the highest quality we remain a vertically integrated manufacturer by not subcontracting any part of the manufacturing process. All products are in compliance with CE directives and all production facilities are ISO 9001 certified.