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  • hanna-hi931-automatic-potentiometric-titrator
  • hanna-hi931-automatic-potentiometric-titrator
  • hanna-hi931-automatic-potentiometric-titrator
  • hanna-hi931-automatic-potentiometric-titrator

Hanna HI931 Automatic Potentiometric Titrator

Envmart Warranty

As per Hanna

100% Original




100% Buyer


  • Specifications




mV Range

-2000.0 to 2000.0 mV

mV Resolution

0.1 mV

mV Accuracy

0.1 mV

mV Calibration

single point offset

pH Range

-2.000 to 20.000 pH; -2.00 to 20.00 pH; -2.0 to 20.0 pH

pH Resolution

0.001 pH; 0.01 pH; 0.1 pH

pH Accuracy

0.001 pH

pH Calibration

up to five-point calibration, eight standard buffers and five custom buffers

pH Temperature Compensation

automatic from -5.0 to 105.0C; 23.0 to 221.0F

ISE Range

1 x 10?6 to 9.99 x 10 concentration

ISE Resolution

1; 0.1; 0.01 concentration

ISE Accuracy

0.5% (monovalent ions); 1% (divalent ions)

ISE Calibration

automatic, 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 105.0C; 23.0 to 221.0F; 268.2 to 378.2K

Temperature Resolution

0.1C; 0.1F; 0.1K

Temperature Accuracy

0.1C; 0.2F; 0.1K, excluding probe error

Potentiometric Titrations

acid/base (pH or mV-mode), redox, precipitation, complexometric, non-aqueous, ion-selective, argentometric

Analog Boards Capability

one analog board for pH/ORP/ISE; not upgradeable

Measurement Units

user-specified expression of concentration units to suit specific calculation requirements

Endpoint Criteria

single equivalence point (1st or 2nd derivative) or fixed pH/mV value

Dosing Pump Capability

one included can be upgraded for two

Flow Rate

user-selectable from 0.1 mL/min to 2 x burette volume/min

Dosing Accuracy

0.1% of full burette volume


one 25 mL burette included

Burette Size Capability

5, 10, 25, and 50 mL (auto-detection)

Dosing Pump Resolution


Stirrer Type

overhead propeller type, 200 to 2500 rpm, resolution 100 rpm

Titrator Methods

up to 100 methods (standard and user-defined)

Real Time & Stored Graphs

mV-volume or pH-volume titration curve, 1st derivative curve or 2nd derivative curve; pH mode, mV mode or ISE mode

GLP Conformity

instrumentation data storage and printing capabilities

Autosampler Compatible

not available

Logging Memory

up to 100 titration and pH/mV/ISE reports




5.7 (320 x 240 pixel) backlit color LCD

Power Supply

100-240 VAC; -01 models, US plug (type A); -02 models, European plug (type C)




315 x 205 x 375 mm (12.4 x 8.1 x 14.8 )


approx. 4.3 kg (9.5 lbs.) with 1 pump, stirrer and sensors

Ordering Information

Each 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.

  • 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.
Product Description

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.

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