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    อุปกรณ์วัด pH (Research Grade Meter with Calibration Check™ pH/ORP and Temperature)

    HI 4221

    Research Grade Meter with Calibration Check™ pH/ORP and Temperature

    HI 4221 is a research grade pH, ORP and temperature benchtop meter.

    The user interface of HI 4221 is fully customizable, and it is capable of showing the measurements in various modes: basic measurement with or without GLP information, graph or logging data.

    This instrument offer multi-language support and contextual help is available through a dedicated Help key. Clear tutorial messages and directions are available on-screen to quickly and easily guide users through all measurement and calibration procedures to ensure measurements and calibrations are performed properly.

    HANNA’s exclusive Calibration Check™ diagnostics system ensures accurate pH readings every time by alerting users of potential problems during the calibration process. The Calibration Check™ system eliminates erroneous readings due to dirty or faulty pH electrodes or contaminated pH buffer solutions during calibration. After the guided calibration process, the electrode condition is evaluated and an indicator is displayed informing the user of the overall pH electrode status.

    Automatic, semiautomatic and manual pH calibration is available in up to five points, with 8 standard (1.68, 3.00, 4.01, 6.86, 7.01, 9.18, 10.01 and 12.45) and up to 5 custom buffers. The Out of Calibration Range and Cal Due features alert the user in the event the measurement is far from the calibration point or when the meter is due for recalibration. Proper, scheduled calibrations are crucial for accurate and repeatable measurements.

    Up to 10 profiles can be saved and recalled, eliminating the need to reconfigure each time when a different electrode is used. User definable configurations can include: temperature compensation modes in accordance with each parameter.

    Three selectable logging modes are available: Automatic, Manual and AutoHold logging. Up to 100 logging lots with 10,000 records each can be stored for automatic or manual mode. Automatic logging features a selectable area and sampling period while GLP information includes complete data about user calibration of each parameter and identification information for the instrument, user, and company. Data can be transferred to a PC via the opto-isolated RS232 or USB ports and HI 92000 software (optional).


    pH  Range  -2.000 to 20.000 pH
    Resolution  0.1 pH; 0.01 pH; 0.001 pH
    Accuracy @ 20°C  ±0.1 pH; ±0.01 pH; ±0.002 pH ±1 LSD
    ORP  Range  ±2000 mV
    Resolution  0.1 mV
    Accuracy @ 20°C  ±0.2 mV ±1 LSD
    Temperature  Range  -20.0 to 120°C; -4.0 to 248.0°F; 253.15 to 393.15 K
    Resolution  0.1°C; 0.1°F; 0.1K
    Accuracy @ 20°C  ±0.2°C; ±0.4°F; ±0.2K (without probe)
    pH Calibration  automatic, up to five point calibration, eight standard buffers available (1.68, 3.00, 4.01, 6.86, 7.01, 9.18, 10.01, 12.45), and 5 custom buffers
    pH Calibration Check  yes
    Relative mV Offset Range  ±2000 mV
    Input Channel  1 pH/ORP
    GLP  cell constant, reference temperature/coefficient, calibration points, cal time stamp, probe offset for conductivity
    pH Temperature
    Compensation  automatic or manual from -20.0 to 120.0°C/-4.0 to 248.0°/253 to 393K
    pH Electrode  HI 1131B glass body pH electrode with BNC connector and 1 m (3.3’) cable (included)
    Temperature Probe  HI 7662-T stainless steel temperature probe with 1 m (3.3’) cable (included)
    Logging  Record  100 lots with 10,000 record/lot
    Interval  settable between one and max log time
    Type  automatic, log on demand, auto HOLD
    Replatinization   yes
    Display  color graphic LCD with on-screen help, graphing, language selection and custom configuration
    PC Connection  USB and RS232
    Power Supply  12 VDC adapter (included)
    Environment  0-50ºC (32 to 122ºF) (273 to 323K) RH max 95% non-condensing
    Dimensions  160 x 231 x 94 mm (6.3 x 9.1 x 3.7”)
    Weight  1.2 Kg (2.64 lbs.)


    HI 1131B  Refillable, Combination pH Electrode for the Laboratory and Beer Testing
    BNC Connection
    HI 920013  USB Cable
    HI 6004  Millesimal Buffer Solution, 4.010 pH, 500 mL bottle
    HI 6007  Millesimal Buffer Solution, 7.010 pH, 500 mL bottle
    HI 6010  Millesimal Buffer Solution, 10.010 pH, 500 mL bottle
    HI 7004L  4.01 pH Buffer Solution
    1 x 500 mL bottle
    HI 7007L  7.01 pH Buffer Solution
    1 x 500 mL bottle
    HI 7010L  10.01 pH Buffer Solution
    1 x 500 mL bottle
    HI 7061L  General Purpose Cleaning Solution
    1 x 500 mL bottle
    HI 70300L   Electrode Storage Solution
    1 x 500 mL bottle
    HI 76404N  Electrode Holder for HI 42xx Type Bench Meters
    HI 92000  Windows® Compatible Software
    HI 7662-T  Stainless Steel Temperature Probe


  • Requesting a Quotation and Ordering Products

    131 Thailand Science Park. Innovation Cluster 1 Building,

    Klong 1, Klong Luang, Pathumthani 12120 Thailand. 

    Tel.  02-191-3928 Fax 02-191-3929

    For more information please contact 081-847-6768 (Ms. Nareerat) IDLine: @alltestkit

    E-mail :


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