What are the key features of the HI-931 Titrator?

The HI-931 Automatic Potentiometric Titrator is a compact, highly versatile titration system that can test a range of different parameters, including standard and custom potentiometric titrations and pH, mV and ISE measurements. Read on to learn more about the features of this automatic titrator:

What is the HI-931 Automatic Titrator?

The HI-931 Automatic Titrator is a space-saving titration system with features that improve accuracy in testing, including a 40,000-step piston-driven pump for extremely small dosing amounts and an easy-to-use method creation system built in to adapt this titrator to specific and niche applications. This titrator is well-suited to a range of industries, including food, beverage, wine and dairy.

For more information about the HI-931 Automatic Potentiometric Titrator, see our article here. For expert advice and guidance on the individual applications for this titrator, contact our team directly on 01525 850 855 or at sales@hannainstruments.co.uk.

Key features of the HI-931 Automatic Titrator

Capable of multiple titration methods

Combine with the HI-931 titrator with Hanna’s comprehensive range of electrodes to increase the versatility of this instrument. This automatic titration system is capable of acid/base, redox (ORP), complexometric, precipitation, non-aqueous, argentometric, and ion-selective titrations. Back titrations and titre determinations can also be performed.

Unmatched 40,000-step piston-driven pump

The HI-931 features a 40,000-step precision pump, enabling the dosing of extremely small amounts of titrant and reagent. This improves the accuracy of the titration process, achieving reliable outcomes from testing. 

Dynamic dosing system

A dynamic titrant dosing system is built into the HI-931, directly relating titrant volume dosed to the mV response from the titration reaction. By altering the volume of titrant throughout the titration process, with larger doses towards the beginning and smaller, precise doses towards the endpoint, it’s possible to achieve an extremely accurate outcome.

Create and store up to 100 custom methods

Custom methods can be created directly through the intuitive user interface of the HI-931, allowing this automatic titrator to be fully customised to specific regulatory and compliance requirements. Up to 100 different custom and standard methods can be stored in the titrator at any one time. 

Video guides to common HI-931 method processes and method creation are readily available online to help you customise this titrator to your needs. Our team of experts are on hand to answer any additional questions about specific methods and provide advice.

Equivalence endpoint detection

The use of equivalence endpoint detection is vital in applications where fixed endpoints are not specific within a standard method. The HI-931 supports this endpoint method, indicating where the mV response from the titration is greatest in relation to the volume of titrant dosed to provide an accurate measurement.

Signal stability feature for reliable measurement

A signal stability feature monitors the stabilisation of the mV response to the titration reaction before the dispensation of the next titration dose. This process ensures reliable measurement values during titration, dosing the correct amount at the right times automatically for consistent results.

Click-Lock burette and dosing system

This automatic potentiometric titrator has a burette system that includes Hanna’s specialist Click-Lock functionality for the easy exchange of reagents and titrants with no risk of cross-contamination. The standard 25 ml burettes can also be swapped out for different sizes to suit individual applications, with compatibility for 5, 10 and 50 ml burettes.

Connect a peristaltic pump for automated reagent dispensing

A second burette or peristaltic pump can be attached to the HI-931 Automatic Titrator and programmed to volumetrically dispense the reagent before starting titration or direct measurement. This addition method helps to achieve consistently accurate results, preventing incorrect dosing or issues relating to forgotten reagent.

Functional electrode holder for easy testing

The purpose-designed electrode holder for the HI-931 features a spring-loaded actuator for the easy raising or lowering of the stirrer and electrodes with a single button push. Sample sizes up to 50 ml can be accommodated by the electrode holder, which mounts directly onto the HI-931 to save space. This holder can support up to 3 electrodes, 4 dispensing tubes, 1 temperature sensor and a removable stirrer.

Versatile measurement for space-saving functionality

The compact design of the HI-931 automatic titrator makes it an ideal solution to save on valuable bench space. The titrator can measure samples as a pH meter, mV/ORP meter, and ISE meter in addition to performing titrations, with multiple analyses possible on a single sample to save time in testing.

Enquire about the HI-931 Automatic Titrator today

Speak to our expert team today to learn more about our automatic potentiometric titrator and discuss your particular requirements for titration. Contact us at sales@hannainstruments.co.uk or call us on 01525 850 855 for personalised advice and guidance on the best instrumentation for your application.