Hanna Milestones 2003 World’s rst pH meter with CAL Check Many problems in pH measurement result from a lack of understanding of the Nernstian response for a pH electrode. Every pH electrode generates a mV response in solutions at a speci c pH. By monitoring the oset and slope characteristics of a pH electrode during the calibration process it is possible to determine potential problems The pH221 and pH222 were the rst pH meters to oer a unique CAL Check feature. During calibration these meters would alert the user if the probe needs to be cleaned or the buer is contaminated. After calibration the probe condition (based on oset and slope) and the probe response were displayed with a ve bar indicator. The greater the number of bars the better the condition and response. 2004 World’s rst process pH meter with integrated cellular communication The ability for remote data acquisition is becoming of increasing importance. Many times it is convenient to monitor a process parameter remotely. With the HI504900 GSM module it is possible to use a SIM card from cellular provider to transmit measurement data over a cellular connection. The HI504 process pH/mV controller allows for the digital transmission of data by using an RS485 serial connection. The HI504 allows for programming responses based on measurement criteria. These responses include the use of sending a text (SMS) messages over the cellular connection. 2004 World’s rst pH/ORP combo tester The measurement of pH and ORP is very common for industries that rely upon oxidizers for sanitization or to promote an oxidation reaction such as with the oxidation of cyanide to cyanate for the treatment of plating wastewater. Both pH and ORP measurements are also made for chemical reactions that use a reducing agent. The ORP generated by oxidizers and reductants are dependent on the pH of the solution. Many times there is enough oxidizer or reductant present but the pH is not at the optimum. With the HI98121 it is possible to monitor both pH and ORP at the same time. The HI98121 is commonly used to monitor pH and chlorine for many applications including swimming, food sanitization, plating wastewater treatment, and cooling tower water treatment. 2005 World’s rst single parameter line of auto titrators for wine testing Total titratable acidity and sulfur dioxide are two important parameters that are measured during the wine making process. To measure these parameters either a pH/mV meter would be used with a volumetric burette or a very expensive and complex titration system is used. Hanna Instruments developed the HI84100 (sulfur dioxide) and HI84102 (acidity) titrators for the wine industry. Both meters were inexpensive and simple to operate. All the chemistry used is premixed and the end point criteria pre-programmed. These meters allowed for the winemaker to perform analytical measurements without the need for sending samples to a lab. 2010 World’s rst hand-held colorimeters (Checker®HC) to oer ease of use and high accuracy in a palm sized design The Checker HC handheld colorimeter series are the rst single parameter colorimeters available in a convenient palm size design. Before the Checker HC colorimeters the user either used a expensive $200-300 portable photometer or they used an inexpensive chemical test kit. The chemical test kits oer the advantage of being inexpensive but they do not provide the high degree of resolution or the non-subjective nature of a photometer. The Checker HC’s provide the bene ts of a colorimeter at a price point of a chemical test kit. The Checker HC’s, like the pHep, are another prime example of Hanna Instruments bringing technology to people that would not normally think of using. 2013 World’s most innovative pH, EC and DO handheld/ portable/wall-mount meter...edge® edge is the thinnest multiparameter meter available. At just 0.5” thick the edge is loaded with many of the features found in expensive benchtop instrumentation. Features include data logging, USB ports, CAL Check™, auto ranging EC /TDS ranges, and GLP data review. edge uses digital pH, ORP, EC and DO probes with a small 3.5 mm connector. The edge is extremely versatile in that it can be used as a portable, benchtop or even as a wall mount indicator. www.hannainst.com | Introduction ix about Hanna
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