HANNA Instruments ....

Research Grade Calibration Check pH Meters


HI 4521 and HI 4522 are research grade, benchtop instruments that feature 8 measurement ranges: pH, ORP (Oxidation Reduction Potential), ISE (HI 4522 only), conductivity, resistivity, TDS, salinity and temperature. These instruments incorporate dual channels with a separate temperature input and support the external reference electrodes required by half cell pH and ISE sensors. HI 4221 and HI 4222 are research grade pH, ORP and temperature benchtop meters. These instruments are fully user customizable and offer a large logging space to fulfill the demands and versatility needed by research laboratories.
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HI 3000 series pH Benchtop Meters


The HI 3512 is a 2 channel professional benchtop meter with a graphic LCD, designed to provide accurate laboratory results. Channel 1 features pH/ORP/ISE and temperature measurement capability while channel 2 measures EC/TDS/NaCl/Resistivity and temperature. HANNA’s HI 3220, HI 3221 and HI 3222 benchtop instruments feature up to five point pH calibration with a choice of five custom buffers and seven standard buffers.
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HI 2000 series pH Benchtop Meters


HI 2550 is a two channel instrument that measures up to Seven parameters. With this single laboratory bench meter you can measure pH, ORP, ISE, conductivity (EC), TDS, NaCl percentage and temperature. The HI 2221 and HI 2223 are pH benchtop meters featuring our exclusive Calibration Check™ diagnostics for both pH electrodes and buffer solutions. These advanced instruments compare the characteristics of the pH electrode from one calibration to the next. In the case of large variances in the electrode condition, these meters alert the user that the electrode needs to be properly cleaned prior to calibration and measuring. Other models such as the HI 2215/6 pH/ORP/ISE meter with 0.001 pH resolution are available.
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