HI931 – Potentiometric titrator with single pump and one input analog boar

The HI931 Automatic Titrator is the answer to your dedicated titration needs. Fully customizable, the HI931 delivers accurate results and intuitive user experience, all in a compact package. Titrate for a variety of measurements at the push of a button including acids, bases, redox, and selective ions. No additional programming upgrades to purchase. The only things you need to start using the HI931 are a sensor and titrant.


  • Small footprint so you can fully optimize your benchtop.
  • Unmatched 40,000-step dosing pump for small volumes of titrant to help you achieve a very precise endpoint for greater consistency.
  • Flexibility to store up to 100 methods.
Κωδικός προϊόντος: ΗΙ931 Κατηγορίες: , Ετικέτα:

Πληροφορίες προϊόντος

Superior design for the busy lab.

The Cycoloy® body is durable, heat-resistant, and resists staining. Dedicated menu buttons are part of the control panel making it fully sealed and easy to clean. A high contrast LCD display makes every character on the display stand out and the wide viewing angle allows measurements to be seen from any angle. The backlight is adjustable for your viewing preference and with a backlight saver option protects the display during periods of inactivity.

Maximize your workspace.

This new generation of titrator features a 50% smaller footprint than the HI901 Automatic Titrator for maximum use of your benchtop lab space.p>

Intuitive User Interface

Functional keys on the control panel that correspond to virtual keys on the display allow for simple and quick navigation between screens and menu. If you need additional information about a screen, simply press the dedicated button for help.

Multiple Titration Types

Paired with the right electrode, this potentiometric titrator can perform any number of standard titrations including pH and mV tests with fixed endpoints or single equivalence points.

Real-Time Graphing

A real-time titration curve can be viewed as the titration progresses. This feature is useful when new methods are tested or when a procedure requires optimization.

Password Protection

Administrative users can set a PIN code on the device protecting against unauthorized access. Titration method options and results are tamper-proof while a non-administrator operates the titrator, ensuring records remain safe, secure, and traceable.

Exchangeable Burette System

With Hanna’s Clip-Lock™ burette feature, it only takes a few seconds to exchange titrants and reagents preventing cross-contamination and saving time.

Precision Dosing Pump

Our unmatched 40,000-step piston driven pump is capable of dosing extremely small and highly accurate volumes of titrant or reagent.

Chemically Resistant Tubing

Aspiration and dispensing tubes are constructed of chemically resistant PTFE plastic and feature a light-blocking polyurethane outer sleeve to protect light sensitive reagents.


Flexible Electrode Holder

This electrode holder can hold up to 3 electrodes, 4 tubes, and 1 temperature probe. The holder is angled to concentrate the probes to the center for smaller beaker sizes. Use electrodes with different diameters when needed by changing the electrode guide.

Adjustable Arm

For a more compact design, the electrode holder is built directly into the titrator body. Height control adjustments are performed by simply pressing the press-to-release button makes. The electrode holder is reversible for use with large magnetic stirrers or oversize beakers.

Precision Stirring

The removable overhead stirrer has built-in speed control for instant feedback in order to maintain consistent stirring speed.


Multiple Measuring Modes

HI931 functions as a potentiometric titrator, pH meter, mV/ORP meter, or ISE meter. Valuable laboratory bench space is saved, and multiple tests can be performed on one sample.

Analytical Balance Interface

Analytical balances with RS232 output can transfer the weight of a sample directly into the meter.

Printer Interface

Titration reports can be printed directly from the titrator to a connected printer.

Automatic Reagent Addition

A peristaltic pump may be programmed to volumetrically dispense reagent prior to titration or direct measurement. This helps achieve consistent and accurate results and prevents operator errors such as incorrect volumes or forgetting reagent addition. The peristaltic pump can also be used to aspirate post-analysis.

Smart Design for Safety

In the event of reagent leakage an external gutter system protects the connections on the back of the meter and interior prevent any liquids from the internal electronics.

Customizable Analysis Reports

Each analysis report is fully customizable so users can ensure they are storing and filing the best data required for their application. New multi-select feature makes batch processing simple.

Flexible GLP Management

All necessary GLP (Good Laboratory Practice) information is recorded with each sample including sample identification, company and operator name, date, time, electrode ID codes, and calibration information.


USB Data Transfer

A conveniently located USB port on the side of the meter is used with a flash drive or direct connection to a PC for the transfer of titration methods, reports, and software upgrades. Reports can be converted to a LIMS friendly format with the use of our PC compatible software.




Product NamePotentiometric titrator with single pump and one input analog board, 230 VAC
Stock Status MessageCall if accurate shipping time is required
Quote RequiredNo
mV Range-2000.0 to 2000.0 mV
mV Resolution0.1 mV
mV Accuracy±0.1 mV
mV Calibrationsingle point offset
pH Range-2.000 to 20.000 pH; -2.00 to 20.00 pH; -2.0 to 20.0 pH
pH Resolution0.001 pH; 0.01 pH; 0.1 pH
pH Accuracy±0.001 pH
pH Calibrationup to five-point calibration, eight standard buffers and five custom buffers
pH Temperature Compensationautomatic from -5.0 to 105.0°C; 23.0 to 221.0°F
ISE Range1 x 10⁻⁶ to 9.99 x 10¹⁰ concentration
ISE Resolution1; 0.1; 0.01 concentration
ISE Accuracy±0.5% (monovalent ions); ±1% (divalent ions)
ISE Calibrationautomatic, up to five point calibration, seven fixed standard solutions available (0.01, 0.1, 1, 10, 100, 1000, 10000 choice of concentration) and five custom solutions
Temperature Range-5.0 to 105.0°C; 23.0 to 221.0°F; 268.2 to 378.2K
Temperature Resolution0.1°C; 0.1°F; 0.1K
Temperature Accuracy±0.1°C; ±0.2°F; ±0.1K, excluding probe error
Potentiometric Titrationsacid/base (pH or mV-mode), redox, precipitation, complexometric, non-aqueous, ion-selective, argentometric
Analog Boards Capabilityone analog board for pH/ORP/ISE; not upgradeable
Measurement Unitsuser-specified expression of concentration units to suit specific calculation requirements
Endpoint Criteriasingle equivalence point (1st or 2nd derivative) or fixed pH/mV value
Dosing Pump Capabilityone included can be upgraded for two
Flow Rateuser-selectable from 0.1 mL/min to 2 x burette volume/min
Dosing Accuracy±0.1% of full burette volume
Buretteone 25 mL burette included
Burette Size Capability5, 10, 25, and 50 mL (auto-detection)
Dosing Pump Resolution1/40000
Stirrer Typeoverhead propeller type, 200 to 2500 rpm, resolution 100 rpm
Titrator Methodsup to 100 methods (standard and user-defined)
Linked Methodsnot available
Back Titrationsnot available
Real Time & Stored GraphsmV-volume or pH-volume titration curve, 1st derivative curve or 2nd derivative curve; pH mode, mV mode or ISE mode
GLP Conformityinstrumentation data storage and printing capabilities
Autosampler Compatiblenot available
Logging Memoryup to 100 titration and pH/mV/ISE reports
Display5.7” (320 x 240 pixel) backlit color LCD
Power Supply100-240 VAC; "-01" models, US plug (type A); "-02" models, European plug (type C)
Dimensions315 x 205 x 375 mm (12.4 x 8.1 x 14.8 ")
Weightapprox. 4.3 kg (9.5 lbs.) with 1 pump, stirrer and sensors
Ordering InformationEach HI931 potentiometric titrator is supplied with titrator, pump assembly, burette assembly, electrodes holder and stirrer, burette blank support, pump and burette locking screws with plastic head, temperature probe, shorting cap, power adapter, USB cable, instruction manual, USB Memory Stick, HI900 PC application (installation kit on USB stick), and quality certificate.