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There was a time when the measurement of pH, conductivity and relative humidity could be performed by complicated apparatus and trained laboratory technicians. The two methods of measuring these parameters were on opposite ends of the spectrum. At one end, you had the traditional pH litmus paper and kits with low resolution. The other method required training and complicated equipment to perform the analysis. The latter method had extremely high resolution, but could not be performed by everyone. Hanna introduced the pHep^® in 1986. This pocket-sized meter literally replaced pH litmus paper for millions of users worldwide. The powerful electronics provided the operators with unparalleled accuracy, great repeatability, long battery life, and above all, an LCD where measurements could be read easily. Hanna knew that this was the answer to pH measurement problems! Since the advent of pHep^®, Hanna has not only improved the pHep^® family by adding waterproof models, but has expanded the line of Pocket Meters to cover areas such as conductivity, relative humidity and salinity. Hanna’s commitment to provide innovative, easy-to-use instruments continues with the introduction of testers featuring new ergonomic, and much more rugged casings, as well as larger LCDs for easier viewing from any angle. Add to these the precision of custom microprocessors and you have convenience and accuracy, in pocket size instrumentation.

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The Hanna line of turbidity meters use the USEPA, Standard Methods & the European Community accepted methods to meet the strict requirements of professionals in many industries. This has been combined with the many state-of-the-art features you have come to expect from Hanna Instruments.

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Traditionally, process monitoring has required considerable investment in system design, equipment, maintenance and training. With the introduction of our mini controllers, we are able to offer a solution for industries that have to monitor a process economically. Hanna's mini controllers are easy to use and allow accurate continuous monitoring and control of pH, ORP, TDS, EC, Resistivity and Level. These compact in-line instruments are designed to consistently perform in most environments and conditions.

Our line of simple-to-operate controllers have been specially designed for hydroponics, swimming pools or applications where space or cost are a major concern. Thanks to their compact size of only 8 by 5 cm (3 x 2"), they can be mounted in confined spaces and right next to tanks or vats. The low cost of the meter will also make it possible for processes that up to now were manually maintained to be controlled automatically, saving considerable time and money. Measurements are displayed in large digits on the LCD and LED lights indicate status even from a distance.