HI 221 and HI 223 are pH/ORP/Temperature Bench Meters setting new calibration standards. Proper calibration of the pH meter and pH electrode system is critical in order to achieve reliable results and Hanna has developed a new system that monitors the two most important parameters during the calibration process, the pH electrode and the buffer solution: Cal-Check.
This new system warns the users in the event the pH electrode is dirty and if the calibration buffer is out of specification (cross contamination). When a pH electrode is not properly cleaned, even the smallest residues of samples left on the sensitive glass can produce slope errors up to a tenth of a pH unit. A pH buffer solution that has been contaminated can also drift by a few tenths of a pH unit, resulting in erroneous calibration. Dirty pH electrodes and buffer solutions cannot be detected by conventional pH meters. Hanna's new pH meters LCD warns the user to clean or replace the pH electrode of buffer solution. This new calibration concept removes the guesswork, and guarantees the user that the equipment is in the best condition.
Both instruments have a "log on demand" function to record 100 (HI 221) or 500 (HI 223) readings, RS232 port for computer connection, Automatic (ATC) or Manual (MTC) Temperature Compensation, and an extended range of seven memorized calibration buffers. HI 221 offers pH readout of 0.01 pH, and HI 223 has a resolution of 0.001 pH.
Specifications for both HI 221 and HI 223:
pH Electrode - HI 1131P glass body, single junction refillable cell, BNC + pin (included)
Temperature probe - HI 7669/2W stainless steel probe (included)
Strict quality assurance from The Lab Depot for our ORP meter and our Hanna orp, in addition to our more than 750,000 other lab products, means you will always have confidence in your research, development or quality control results. After all, your laboratory testing procedures should only include the very best – whether bench top temperature meters, chemicals, glassware or other sophisticated instrumentation. Always look to The Lab Depot for value and for quality lab equipment.
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