HI-2221 Calibration Check pH Bench Meter

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Complete with pH electrode

2 year manufacturer warranty

In Stock

£555.00 (exc. VAT) £666.00 (inc. VAT)

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The Hanna HI-2221 & HI-2223 compare the characteristics of the pH electrode from one calibration to the next. In case of large variances in the electrode condition that can only be the result of a soiled sensor, these meters alert the user that the electrode needs to be properly cleaned prior to calibration and measuring.

HI-2221 Calibration Check pH Bench Meter information

Hanna's extended description

The HI-2221-02 is a pH bench top meter features 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 its capability to measure mV with a resolution up to 0.1 mV.

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 standardisation curve created during the calibration process will remain a valid reference until the next calibration.

Key features

pH Calibration Check

On-screen electrode condition and response time

Up to five point calibration with seven standard buffers

Diagnostic alerts through icons

Automatic Temperature Compensation

GLP features

Optional PC interface via USB

HI-1131B pH electrode and HI 7662 temperature probe

HI-76404N electrode holder

Starter pack of buffer and cleaning solutions

12 VDC adapter

Instructions

Replaceable Electrode – No need to replace the whole meter when the electrode needs replacing. Spare and replacement electrodes are available for this product.

PC Interface (optional) - Download test results to a computer programmed with HANNA’s Windows® compatible software (HI-92000), directly from equipment via a USB port or a RS232 cable outlet.

Specifications

Specifications list

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.)

Hanna Instruments

Scientific Equipment