Hanna Instruments (M) Sdn Bhd
11A, Jalan PJS 11/20,
Bandar Sunway,
46150 Petaling Jaya,
Selangor, Malaysia.
+603-5638 9940

Penang Branch Office
Hanna Instruments (M) Sdn Bhd
N0. 303-2-27, Krystal Point,
Jalan Sultan Azlan Shah,
11900 Sungai Nibong,
Penang, Malaysia.
+604-638 4558
+604-645 4558

Sabah Branch Office
Hanna Instruments (M) Sdn Bhd

No. 4-1, 1st Floor,
Plaza Kingfisher,
Jalan Plaza Kingfisher 5,
Inanam, 88450 Kota Kinabalu,
Sabah, East Malaysia.
088-382 941
088-382 942

HI6221 Advanced pH/ORP Benchtop Meter

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HI6221 Advanced pH/ORP Benchtop Meter New Benchtop Meters HI6221 Advanced pH/ORP Benchtop Meter New Benchtop Meters HI6221 Advanced pH/ORP Benchtop Meter New Benchtop Meters HI6221 Advanced pH/ORP Benchtop Meter New Benchtop Meters HI6221 Advanced pH/ORP Benchtop Meter New Benchtop Meters
RM 4,816.00
SKU: HI6221
1.2 kg
20 cm (L) x 16 cm (W) x 8 cm (H)
Out of Stock

Download Files

HI6221_Instruction_manual_ENG.pdf (4.98 MB)

HI6221 Advanced pH/ORP Benchtop Meter


Measure pH/mV (pH) or mV/Rel. mV (ORP) with Temperature

HI6221 is a streamlined benchtop meter with a large touch screen display, comprised of a housing and an integrated pH / ORP measurement module.

Compact and easy to operate, the benchtop meter is delivered with Hanna Instruments HI1131B double junction combination pH electrode, together with HI7662-TW temperature probe.

HI1131B is a glass body, double junction, refillable pH electrode with an indicating sensor made of High Temperature (HT) glass. The double junction reference and HT glass design allow the HI1131B to be used in a wide variety of applications including samples with metals and elevated temperatures. Probe connection to the unit is secured through a galvanically isolated BNC connection. HI7662-TW stainless steel temperature probe allows the meter to automatically temperature compensate (ATC) pH measurements.


front back


This system responds to a complex range of measurement and monitoring requirements, providing accuracy, reproducibility, and reliability. HI6221 is supplied with an electrode holder that has a flexible arm. The holder can be mounted quickly and provides secure support for electrodes while taking measurements in sample containers.

User interface

  • 7-inch capacitive touch screen with multi-touch support
  • Capacitive touch back, home and system menu keys
  • User-friendly icons and symbols allow users to easily navigate and interpret the instrument functions.
  • The user can select between five different views:
    • Basic measurement configuration
    • Simple GLP with calibration information
    • Full GLP with electrode status and calibration point details
    • Live updated, interactive graph
    • Tabulated data with date, time, and notes


  • Measure pH/mV (pH) or mV/Rel.mV (ORP) with temperature
  • Application-specific profiles allow quick and direct measurement without the need to update the sensor and system settings
  • Active log during measurement o Measurement stability indicator (using the Stability Criteria setting)
  • Reading modes: direct and direct/autohold
  • Temperature compensation can be Automatic (using temperature probe) or set manually
  • Audible and/or alarm messages for measurements outside of predefined limits
  • Galvanic isolation for pH/ORP measurement


  • 5-point pH calibration with automatic recognition for standard buffers (Hanna and NIST buffers)
  • Choice of standard or custom buffers for calibration
  • Non-volatile memory saves data and settings


  • Data log collection of at least 1,000,000 data points (with time and date stamp)
  • Logging types: manual, automatic, autohold
  • Sample ID for manual and Autohold data

Connectivity features & services

  • Transfer logged data to a USB thumb drive
  • Log files that include measurements and calibration data (as .csv file)
  • FTP and email for log export via Ethernet and Wi-Fi connection
  • USB type A for USB stick, keyboard, and printer
  • USB type C for USB stick and PC connection

Help section for meter guidance

  • Video support presentation of main functionalities



Customize calibration options such as Last Calibration, Automatic, semi-automtic or manual calibration, First Calibration Point, daily or periodic Calibration Reminder, and buffer Groups.



Capacitive touch screen with multi-touch support

The benchtop unit has a 7-inch color display with 800 x 480p resolution. The capacitive, multi-touch screen supports video playback and data plotting.

System Menu key

This key will enter the system menu where User accounts, System Settings, and Logging can be configured. The Help menu is also accessed on the system menu screen.

Measurement setup menu

Opens sensor setup parameters.

Direct/Autohold readings

When Direct/Autohold is selected, measurement reading is held on display when measurement stability is reached. This option removes the subjective nature of stability as a measurement that has not reached equilibrium will not be used.

When not selected, sample measurements are displayed continuously.


HI6221 is supplied with:

  • HI1131B pH electrode; HI7662-TW temperature probe
  • pH calibration starter kit consisting of:
    • pH 4.01 buffer solution sachet (2 pcs.)
    • pH 7.01 buffer solution sachet (4 pcs.)
    • pH 10.01 buffer solution sachet (2 pcs.)
  • HI700601 electrode cleaning solution sachet (2 pcs.)
  • HI7082 3.5M KCl electrolyte solution (30 mL)
  • HI764060 electrode holder
  • Capillary pipette
  • 24 VDC power adapter
  • USB-C to USB-A cable
  • Quick reference guide with instrument quality certificate.



More Information
SKU HI6221
Product Name Advanced pH/ORP Benchtop Meter- HI6221
Quote Required Yes
pH Range -2.0 to 20.0 pH; -2.00 to 20.00 pH; -2.000 to
pH Range 20.000 pH
pH Resolution 0.1 pH; 0.01 pH; 0.001 pH
pH Accuracy ±0.1 pH; ±0.01 pH; ±0.002 pH (±1 last significant digit)
mV Range ±2000.0 mV
mV Resolution 1 mV; 0.1 mV
mV Accuracy ±0.2 mV ±1 last significant digit
Temperature Range -20.0 to 120.0 °C; -4.0 to 248.0 °F; 253.0 to 393.0 K
Temperature Resolution 0.1 °C / 0.1 °F / 0.1 K
Temperature Accuracy ±0.2 °C / ±0.4 °F / ±0.2 K
Relative mV offset range ±2000.0 mV
pH Calibration Calibration points Up to 5
pH Calibration Type Automatic; Semiautomatic; Manual
pH Calibration Standard buffers Hanna and NIST
pH Calibration Standard buffers pH 1.68, 3.00, 4.01, 6.86, 7.01, 9.18, 10.01, 12.45''
pH Calibration Custom buffers Up to 5
pH Calibration Custom group Up to 5
pH Calibration 1st calibration point Offset or Points (user setting)
pH Calibration Reminder Disabled
pH Calibration Reminder Daily
pH Calibration Reminder Periodic
Temperature Compensation Automatic or Manual
Reading Modes Direct; Direct/Autohold
Reading Stability criteria Accurate; Medium; Fast
Reading Isopotential 7.000 or 4.010
Reading Sampling rate 1000 ms
pH Views Basic Measurement (pH, mV, Rel.mV, Abs.mV)
pH Views Basic Temperature, Stability status
pH Views Simple GLP Basic view information
pH Views Simple GLP Last calibration date, electrode offset, average slope, and electrode condition
pH Views Full GLP Simple GLP information and calibration point details
pH Views Table Measurements updated every second are displayed in table
pH Views Graph (Plot) pH (or mV) and temperature versus time graph can be panned or zoomed (pinch-to-zoom technology)
Logging Type Automatic, Manual, Autohold
Logging Number of records 50 000 maximum per file / Stores at least 1 000 000 data points per user''
Logging Automatic interval 1, 2, 5, 10, 30 seconds
Logging Automatic interval 1, 2, 5, 10, 15, 30, 60, 120, 150, 180 minutes''
Logging Sample ID Incremental mode
Logging Export option .csv file format
Logging Export option Users Up to 9 users and admin. account (default)
Connectivity USB-A 2 ports for keyboard input or USB thumb drive
Connectivity USB-C 1 port for PC connectivity and USB-C type thumb drive
Connectivity Wi-Fi & Ethernet FTP / Web server Log transfer and download Email
Connectivity RS232 Connecting peripherals
Power supply DC adapter 100-240AC to 24VDC 2.5A
Environment 0 - 50 °C / 32 - 122 °F / 273 - 323 K maximum 95% RH non-condensing
Dimensions 205 x 160 x 77 mm (8.0 x 6.2 x 3.0 “)
Weight Approximately 1.2 kg (2.65 lbs.)

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