PC interface via USB
A properly manufactured and maintained pH electrode will retain its measuring integrity for a long
time. As a result of many factors such as age, poor maintenance or improper handling, any electrode
in time will lose its integrity.
The most common cause for pH measurement inaccuracies is an unclean or improperly cleaned
electrode. This is very important to note, because during calibration, the instrument assumes that the
electrode is clean and that the standardization curve created during the calibration process will
remain a valid reference until the next calibration.
A dirty electrode or wrong calibration approach can contribute to buffer solution contamination. A
contaminated buffer solution can present a major problem during calibration due to the fact that it is
considered the only reference.
The HI 2221 is a pH benchtop meter featuring our exclusive Calibration Check™ diagnostics for both
pH?electrodes and buffer solutions during calibration. This instrument compares the characteristics
of the pH electrode from one calibration to the next. In the case of large variances in the electrode
condition, it alerts the user that the electrode needs to be properly cleaned prior to calibration and
measuring.
The second feature is to detect if the calibration buffer solution is contaminated. After calibration, the
probe condition is evaluated and an indicator is displayed informing the user of the overall pH
electrode status.
This instrument can measure using ORP electrodes (pH channel input), due to it’s capability to
measure mV with a resolution up to 0.1 mV.
This meter also features five point calibration with seven standard buffers, Automatic Temperature
Compensation and GLP capabilities that allow for the storage and retrieval of all data regarding pH.
With a built-in logging function, measurements are stored in non volatile memory and can be
transferred to a PC through the USB port.
Specifications:
|
Range
|
pH
|
– 2.00 to 16.00 pH
|
|
|
mV
|
± 699.9 mV; ± 2000 mV
|
|
|
Temperature
|
– 20.0 to 120.0 °C
|
|
Resolution
|
pH
|
0.01 pH
|
|
|
mV
|
0.1 mV (± 699.9 mV); 1 mV (± 2000 mV)
|
|
|
Temperature
|
0.1 °C
|
|
Accuracy
|
pH
|
± 0.01 pH
|
|
|
mV
|
± 0.2 mV (± 699.9 mV); ± 1 mV (± 2000 mV)
|
|
|
Temperature
|
± 0.2 °C (excluding probe error)
|
|
pH Calibration
|
|
Up to 5 point calibration, 7 standard buffers available (1.68,
4.01, 6.86, 7.01, 9.18, 10.01, 12.45)
|
|
Temperature Compensation
|
|
Manual or automatic from -20 to 120°C
|
|
Temperature Probe
|
|
HI 1131P glass body, single junction, refillable with BNC
connection and 1 m (3.3') Cable HI 7662 stainless steel probe
|
|
PC Connection
|
|
USB
|
|
Data Logging
|
|
100 points
|
|
Dimensions
|
|
235 x 222 x 109 mm (9.2 x 8.7 x 4.3")
|
|
Weight
|
|
1.3 kg (2.9 lb.)
|
MSDS:
Click on the links below to download the Safety Data Sheet.
Electrodes:
|
|
Combination pH Electrode, Refillable w/ Double Junction
BNC Connection + pin
|
|
|
Combination pH Electrode, Refillable w/ Conical Tip
BNC + pin Connection
|
|
|
Combination pH Electrode w/ Micro Bulb
BNC + pin Connection
|
|
|
Refillable, Combination pH Electrode for the Laboratory and Beer Testing
BNC + pin Connection
|
|
|
pH Electrode for Chemicals, Quality Control, and Field
BNC + Pin Connection
|
Solutions:
|
|
pH 4.01 buffer solution
|
|
|
pH 7.01 buffer solution
|
|
|
pH 10.01 buffer solution
|
|
|
General Purpose Cleaning Solution
1 x 500 mL bottle
|
|
|
Electrode Storage Solution
1 x 500 mL bottle
|
Accessories:
|
|
Windows® Compatible Software
|
|
|
USB Cable
|
|
|
Electrode Holder for HI 42xx Type Bench Meters
|
Probes:
|
|
Stainless Steel Temperature Probe
|
Order Information:
HI 2221-01 (115V) and HI 2221-02 (230V) and are supplied with HI 1131B pH electrode, HI 7662
temperature probe, HI 76404N electrode holder, HI 70004 pH 4.01 buffer solution sachet, HI 70007
pH 7.01 buffer solution sachet, HI 700661 cleaning solution sachet, HI 7071S electrolyte solution (30
mL), 12 VDC adapter and instructions.
Downloads: