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In the past, the measurement and monitoring of many important parameters was limited to the laboratory. Now, these parameters are being tested right in the field in various applications, including environmental study, agriculture, the food industry, horticulture, wastewater management, fish farming, water quality maintainence and anywhere quality and accuracy is important. HANNA has developed a large variety of testers and monitors designed to fulfill the requirements of virtually any application. HANNA offers a vast selection of single and multiparameter testers which cover a multitude of the most important parameters: pH, ORP, conductivity, TDS, temperature, sodium, salt and relative humidity. Testers can perform on the spot measurement quickly, accurately and inexpensively. They allow users with different backgrounds and technical training to make readings without the need of a laboratory, and without having to purchase much more expensive and complicated analytical equipment. HANNA provides high accuracy in a single parameter tester for pH, TDS, conductivity, temperature and more. Multiparameter testers are also available, eliminating the hassle of carrying multiple testers. These testers have easy to read LCD’ s and durable outer casings. They are able to measure in places with a high percentage of humidity, and low power demand allows a long battery life— no worrying about frequent battery replacement.