Bench Top pH Meters with pH range -2.00 to 16.00

Bench Top pH Meters with pH range -2.00 to 16.00

These pH/ORP/Temperature bench meters monitor the pH electrode and buffer solutions. These meters warn the user 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 residue of samples left on the sensitive glass can produce slope errors up to a tenth of a pH unit.

Item# Description U.S. List Price Quantity
72-6094 pH 223 pH/ORP/Temperature (°C) Bench Meter with Calibration Check, pH range -2.00 to 16.00 or -2.000 to 16.000
72-6093 pH 221 pH/ORP/Temperature (°C) Bench Meter with Calibration Check, pH range -2.00 to 16.00
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• Notifies user when recalibration or electrode replacement is necessary


• Information is storable and downloadable


• Automatic or manual temperature compensation


• 7 memorized calibration buffers
These pH/ORP/Temperature bench meters monitor the pH electrode and buffer solutions. These meters warn the user 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 residue 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, resulting in wrong calibrations and subsequent erroneous pH measurements. Hanna’s new pH meters have addressed this problem by displaying symbols on the LCD that warn the user to clean or replace the buffer solution with a fresh one. 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 (pH 221) or 500 (pH 223) readings, RS232 port for computer connection, automatic or manual temperature compensation (ATC or MTC), and an extended range of 7 memorized calibration buffers. pH 221 offers a readout of 0.01 pH and pH 223 has a resolution of 0.001 pH.
Specifications72-609472-6093
Digital OutputOpto-isolated RS232Opto-isolated RS232
ElectrodeBS4 72-1966BS4 72-1966
Environment (RH)95%95%
Environment (
Environment (
Input Impedance1012?1012?
Logging500 points100 points
Meter Dimensions (H x W x D) English9.4 x 7.2 x 2.9 in9.4 x 7.2 x 2.9 in
Meter Dimensions (H x W x D) Metric240 x 183 x 74 mm240 x 183 x 74 mm
Power Supply12 VDC adapter12 VDC adapter
Temperature Compensation (
Temperature Probestainless steel probestainless steel probe
Temperature Range (
Temperature Resolution (
Weight English2.4 lb2.4 lb
Weight Metric1.1 kg1.1 kg
mV Range-999.9 to 999.9; -2000 to 2000-699.9 to 699.9; -2000 to 2000
mV Resolution0.01, 10.01, 1
pH Range-2.00 to 16.00 or -2.000 to 16.000-2.00 to 16.00
pH Resolution0.01; 0.0010.01