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 The pH-Redox Meters pH 22 are portable, battery-operated meters for combined measurement of pH value, redox potential and temperature. They offer a number of useful functions:
The facility for continuous logging of minimum and maximum values can be viewed at any time without interrupting measurements.
Automatic calibration using preset buffer values for pH 2, 4, 7, 9 and 11 which are confirmed by pressing a button. Manual calibration is possible by entering a specific calibration value which is then stored for future use.
Inclusion of a separate glass electrode with a platinum ring filled with liquid electrolyte for measuring redox potential. Automatic switch-off if the instrument has not been used for 30 minutes.
An error message on the display if the electrode is defective or not properly connected.
Each instrument comes as a complete kit including pH electrode and accessories in a carrying case.
The Advantages
- Rugged, splash proof, membrane keypad and front facing (IP 54) for use in the field and in wet environments
- Simple, straightforward operation
- A seriel interface for data logging and analysis
- Continuous display of minimum and maximum values
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pH-Redox Meter pH 22
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Measuring range and displays:
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pH 0 - 14 (1 Digit = 0.01 pH)
± 1999 mV (1 Digit = 1 mV)
0 - 100 ¡C (1 Digit = 0.1 ¡C)
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Accuracy:
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pH ± 0.02 ± 1 Digit
± 2 mV ± 1 Digit
± 0.2 ¡C ± 1 Digit
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Input resistance:
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> 1012 Ohm
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pH-electrode with temperature sensor for automatic temperature compensation:
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Gel electrolyte, maintenance-free, with integrated Pt 1000, connection DIN 19 262 plug and separate 2 mm plug, working range 0 - 80 ¡C
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pH electrode:
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Glass electrode, can be refilled, connection DIN 19 262 plug, working range 0 - 80 ¡C
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Temperature sensor:
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Pt 1000, DIN Class B, handle with sensor tube diam.
3 mm, connection 3.5 mm plug
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Manual temperature compensation:
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0 - 100 ¡C
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Calibrating:
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5 stored default standard buffer values with temperature compensation, additio-nal buffer values chosen by user
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Electrode defect:
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Fault message on the display, if the asymmetric potential or slope conductance are outside the preset limits
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Battery:
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9 V block
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Battery life:
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approx. 1000 hours
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Protection of calibration data:
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100 % via ROM, also when changing batteries
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Output PC interface:
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6-pole jack for RS 232 cable
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Ambient temperature:
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0 - 50 ¡C
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Type of protection:
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IP 54, ABS plastic housing, splash-proof
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Dimensions:
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210 length x 85 width x 37 height (mm)
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Weight:
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0.25 kg (without accessories, electrode and case)
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EC conformity:
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CE identification marking
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Delivery details
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Each instrument comes as a complete kit include pH electrode, 2 buffer solutions (pH 4 and 7), KCl solution, operating instructions and guarantee certificate.
incl. pH-electrode (421642), glass shaft, KCL-filling, (without temperature sensor - for pH measurement with manual temperature compensation)
Cat.-No.: 421641
incl. pH-electrode (421642), glass shaft, KCL-filling, and separate temperature sensor Pt 1000 (421643)
Cat.-No.: 421640
incl. pH-electrode-Gel-type (maintenance-free), with integrated temperature sensor (421631)
Cat.-No.: 421630
PC-Software Series 22 with connection cable
Cat.-No.: 412634
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