Advanced pH/ORP Benchtop MeterAdvanced pH/ORP Benchtop MeterAdvanced pH/ORP Benchtop MeterAdvanced pH/ORP Benchtop MeterAdvanced pH/ORP Benchtop Meter

Advanced pH/ORP Benchtop Meter

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

View Quote

Fast response from our specialists

Why buy from Geneq? - find out more

Advanced pH/ORP Benchtop Meter

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.

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
  • 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
pH-2.0 to 20.0 pH; -2.00 to 20.00 pH; -2.000 to 20.000 pH
mV±2000.0 mV
Temperature-20.0 to 120.0 °C; -4.0 to 248.0 °F; 253.0 to 393.0 K
pH0.1 pH; 0.01 pH; 0.001 pH
mV1 mV; 0.1 mV
Temperature0.1 °C / 0.1 °F / 0.1 K
pH±0.1 pH; ±0.01 pH; ±0.002 pH(±1 last significant digit)
mV±0.2 mV ±1 last significant digit
Temperature±0.2 °C / ±0.4 °F / ±0.2 K
Relative mV offset range±2000.0 mV
ModesDirect; Direct/Autohold
Stability criteriaAccurate; Medium; Fast
Isopotential7.000 or 4.010
Sampling rate1000 ms
pH Calibration
Calibration pointsUp to 5
TypeAutomatic; Semiautomatic; Manual
Standard buffersHanna and NIST
pH 1.68, 3.00, 4.01, 6.86, 7.01, 9.18, 10.01, 12.45
Custom buffersUp to 5
Custom groupUp to 5
1st calibration pointOffset or Points (user setting)
Daily: 0 min. to 23 hours and 59 min.
Periodic: 1 min. to 500 days, 23 hours and 59 min
pH Views
BasicMeasurement (pH, mV, Rel.mV, Abs.mV)
Temperature, Stability status
Simple GLPBasic view information
Last calibration date, electrode offset, average
slope, and electrode condition
Full GLPSimple GLP information and calibration point details
TableMeasurements updated every second are displayed in table
Graph (Plot)pH (or mV) and temperature versus time graph can be panned or zoomed (pinch-to-zoom technology
Temperature CompensationAutomatic or Manual
TypeAutomatic, Manual, Autohold
Number of records50000 maximum per file
Stores at least 1000000 data points per user
Automatic interval1, 2, 5, 10, 30 seconds
1, 2, 5, 10, 15, 30, 60, 120, 150, 180 minutes
Sample IDIncremental mode
Export option.csv file format
UsersUp to 9 users and admin. account (default)
USB-A2 ports for keyboard input or USB thumb drive
USB-C1 port for PC connectivity and USB-C type thumb drive
Wi-Fi & EthernetFTP; Web server: Log transfer and download; Email
RS232Connecting peripherals
Power supplyDC adapter 100-240AC to 24VDC 2.5A
Environment0 - 50 °C / 32 - 122 °F / 273 - 323 K
maximum 95% RH non-condensing
Dimensions205 x 160 x 77 mm (8.0 x 6.2 x 3.0 “)
WeightApproximately 1.2 kg (26.5 lbs.)