Hanna Instruments HI931 Automatic Potentiometric Titrator Titrator Hanna Instruments

Hanna Instruments HI931 Automatic Potentiometric Titrator

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The Hanna Instruments HI931 Automatic Potentiometric Titrator delivers precision, speed, and flexibility for dedicated titration needs. Compact yet powerful, this fully customizable titrator allows you to perform accurate measurements for acids, bases, redox reactions, and selective ions at the push of a button—without the need for extra programming upgrades.

• Space‑saving design optimizes your benchtop while boosting productivity

• Advanced 40,000‑step dosing pump ensures precise endpoints and consistent results

• Ideal for laboratories requiring reliable, automated titration across multiple applications

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Fast Delivery

Most items ship same day

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Manufacturer Warranty

All products are covered by manufacturer warranty

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After-Sale Support

24/7 support

GET A QUOTE

Get the job done with our Automatic Titrator

It is perfect for those in various industries and is widely used by chemists, researchers, educators, food manufacturers, beverage producers, and metal finishers, to name a few.

Test Salt and Acidity in Food Products with Confidence

From titration to table, create a tasty food product every time. Salt and acidity are critical factors in ensuring the quality, consistency, and safety of food products. Our Automatic Titrator uses a linked analysis method to measure both salt and acidity in a single sample, delivering fast, accurate results in just minutes. Comply with standards easily, streamline your QC processes faster, and avoid product recalls with an Automatic Titrator in-house.

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HI931 Automatic Potentiometric Titrator side view

Superior Design for Reliable Results

The Hanna Instruments HI931 Automatic Potentiometric Titrator is engineered with a rugged Cycoloy® body that resists heat, staining, and wear, ensuring long-term durability in demanding laboratory environments. Its fully sealed interface integrates menu buttons directly into the display, making the unit easy to clean and resistant to spills. A high-contrast LCD with wide viewing angles and adjustable backlighting guarantees clear visibility of every measurement, while the backlight saver protects the screen during idle periods. This thoughtful design delivers both reliability and efficiency, helping laboratories achieve consistent titration results with confidence.

HI931 titration curves and method visualization

Multiple Titration Types

The HI931 Automatic Potentiometric Titrator supports a wide range of standard titrations. Pair with the appropriate electrode to run pH and mV measurements using fixed endpoints or single equivalence points, enabling versatile workflows across acids, bases, and redox applications.

Track Your Progress

View a real‑time titration curve as the analysis proceeds. This visualization helps optimize new methods, troubleshoot procedures, and confirm endpoints for consistent, repeatable results.

Enhanced Security Options

Administrative PIN control protects method settings and results from unauthorized changes. While non‑administrators operate the instrument, titration options and records remain tamper‑proof, ensuring traceability and data integrity.

HI931 Automatic Potentiometric Titrator burette system

Exchangeable Burette System

Hanna’s innovative Clip‑Lock™ burette design allows rapid exchange of titrants and reagents in just seconds. This prevents cross‑contamination, reduces downtime, and keeps your titration workflow efficient and reliable.

Precision Dosing Pump

The HI931 Automatic Potentiometric Titrator features a 40,000‑step piston‑driven dosing pump capable of delivering extremely small, highly accurate volumes of titrant. This ensures precise endpoints and unmatched consistency across repeated analyses.

Chemically Resistant Tubing

Built with durable PTFE aspiration and dispensing tubes, the system resists harsh chemicals while a polyurethane outer sleeve blocks light to protect sensitive reagents. This robust design guarantees long‑term reliability in demanding laboratory environments.

Flexible Electrode Holder

The HI931 Automatic Potentiometric Titrator includes a versatile electrode holder capable of supporting up to three electrodes, four tubes, and one temperature probe simultaneously. Its angled design and removable stirrer make it easy to handle small‑volume titrations while maintaining precise alignment for consistent results.

Adjustable Arm

Built directly into the titrator body, the adjustable arm saves bench space and simplifies sample handling. A press‑to‑release button allows quick height control, while the reversible holder accommodates larger beakers for maximum flexibility in laboratory workflows.

Smarter Stirring

The removable overhead stirrer features integrated speed control, ensuring uniform mixing and reproducible titration conditions. This intelligent design improves accuracy and reliability across a wide range of applications.

HI931 Automatic Potentiometric Titrator electrode holder system

HI931 Automatic Potentiometric Titrator back view

Take Advantage of Versatility

The HI931 Automatic Potentiometric Titrator functions as a titrator, pH meter, mV/ORP meter, and ISE meter all in one compact instrument. This multi‑purpose design saves valuable bench space while allowing multiple analyses to be performed on a single sample.

Stay Connected

Easily connect essential devices such as an analytical balance for automatic sample weight entry or a printer for generating detailed reports. The HI931 integrates seamlessly with your lab setup to streamline workflows.

View and Print Reports Easily

Reports can be printed directly from the titrator when connected to a printer, ensuring fast documentation and traceable records for compliance and quality assurance.

Customizable Analysis Reports

The HI931 Automatic Potentiometric Titrator allows users to tailor every analysis report to their specific needs. With batch processing and multi‑select features, laboratories can streamline data management while ensuring critical information is captured for compliance and review.

Flexible GLP Management

All essential Good Laboratory Practice (GLP) details are automatically recorded with each sample, including operator name, company, date, time, electrode ID codes, and calibration data. This ensures traceability and supports rigorous quality standards.

Effortless Data Transfer

A conveniently located USB port and PC connectivity make it simple to transfer titration methods, reports, and software upgrades. Data can be easily converted into LIMS‑friendly formats, integrating smoothly with laboratory information systems.

HI931 Automatic Potentiometric Titrator USB connectivity

Hanna Instruments HI932 Advanced Automatic Potentiometric Titrator

Need More?

Upgrade to the Advanced Automatic Potentiometric Titrator HI932 for laboratories requiring more complex analyses and expanded functionality.

Specification	Detail
sku	HI931
pH range	-2.0 to 20.0 pH -2.00 to 20.00 pH -2.000 to 20.000 pH
pH Resolution	0.1 pH 0.01 pH 0.001 pH
pH Accuracy (@25ºC/77ºF)	±0.001 pH
pH Calibration	up to five-point calibration, eight standard buffers and five custom buffers
mV Range	-2000.0 to 2000.0 mV
mV Resolution	0.1 mV
mV Accuracy (@25ºC/77ºF)	±0.1 mV
mV Calibration	single-point offset
ISE Range	1 x 10^-6 to 9.999 x 10¹⁰
ISE Resolution	1 0.1 0.01
ISE Accuracy	±0.5% monovalent ±1% divalent
ISE Calibration	up to five-point calibration, seven standard solutions and five user-defined standards
Temperature Range	-5.0 to 105.0°C 23.0 to 221.0°F 268.2 to 378.2K
Temperature Resolution	0.1°C 0.1°F 0.1K
Temperature Accuracy	±0.1°C ±0.2°F ±0.1K, excluding probe error
Temperature Compensation	manual (MTC) or automatic (ATC)
Programmable Stirrer	overhead propeller type, 200 to 2500 rpm, resolution 100 rpm
Burette Sizes	5, 10, 25, and 50 mL
Burette Resolution	1/40000
Display Resolution	0.001 mL
Dosing Accuracy	±0.1% of full burette volume
Methods	up to 100 methods (standard and user-defined)
Logging Data	up to 100 titration and pH/mV/ISE reports
Burette Auto-Detection	burette size is automatically recognized when inserted into the unit
Flow Rate	user-selectable from 0.1 mL/min to 2 x burette volume/min
Endpoint Determination	single equivalence point (1st or 2nd derivative) or fixed pH/mV value
Potentiometric Titrations	acid/base (pH or mV-mode), redox, precipitation, complexometric, non-aqueous, ion-selective, argentometric
Measurement Units	user-specified expression of concentration units to suit specific calculation requirements
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: pH/mV/concentration versus time
USB Host (Side)	flash drive compatibility for transfer of methods and reports
Peripherals (Rear)	connections for external PC keyboard, printer, PC connection, analytical balance, & USB flash drive
GLP Conformity	instrumentation data storage and printing capabilities
Languages	English, Portuguese, Spanish, Deutsch
Operating Environment	10 to 40°C (50 to 104°F), up to 95% RH
Storage Environment	-20 to 70°C (-4 to 158°F), up to 95% RH
Power Supply	100-240 VAC -01 models, US plug (type A) -02 models, European plug (type C)
Dimensions	315 x 205 x 375 mm (12.4 x 8.1 x 14.8)
Weight	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, Pump and Burette Locking Screws with Plastic Head, Temperature Sensor, Shorting Cap, Power Adapter, USB Cable, Instruction Manual, USB Memory Stick, HI900 PC Application (Installation Kit on USB Stick), and Quality Certificate.
Warranty	2 years

Shipping, Return, and Warranty Policy

At Blue Tiger Scientific, we are proud to distribute authentic Hanna Instruments products. The following policies apply to all purchases made through our store.

Shipping Policy

All orders are shipped via FedEx from Hanna Instruments' fulfillment center in Smithfield, Rhode Island.
FedEx Ground is the standard method; expedited options (2-Day, Overnight) are available for an additional cost.
Hanna Instruments only ships to residential or business addresses within the United States (no PO Boxes).
Orders placed after business hours, weekends, or holidays will ship the next business day, pending product and carrier availability.
Shipping timelines may vary depending on product availability, order size, and carrier logistics.
Blue Tiger Scientific and Hanna Instruments are not responsible for carrier delays, weather-related disruptions, or other unforeseen delivery issues once the order has shipped.

Return Policy

All return requests must be coordinated directly with Blue Tiger Scientific before a product is sent back.
Products must have a Return Merchandise Authorization (RMA) number issued by Blue Tiger Scientific before being returned.
Products must be returned in new or like-new condition, with the original packaging and proof of purchase (such as an invoice or packing slip).
Customers are responsible for return shipping costs unless otherwise stated.
Unauthorized returns (without an RMA) will be refused and returned at the customer's expense.
Returns are subject to inspection and approval. Products not in acceptable condition may be denied credit.
Some products, such as custom-built, special order, and hazardous materials, may not be eligible for return.

Warranty Policy

Hanna Instruments' products are covered by their Limited Warranty against defects in materials and workmanship under normal use.
All warranty claims and services are handled directly by Hanna Instruments.
Warranty periods vary by product. If unspecified, the standard warranty term is 18 months from the Hanna Instruments factory ship date.
If you experience an issue believed to be covered under warranty, please contact Hanna Instruments for guidance on how to submit your warranty request to Hanna Instruments.
Customers must follow Hanna Instruments' warranty submission process, including providing a claim number, product model and serial number, and a detailed description of the issue.
Hanna Instruments will determine whether products are repaired, replaced, or otherwise serviced under warranty.
Note: Warranty coverage does not apply to damage caused by misuse, accidents, unauthorized repairs, or improper storage and handling.

Important Notes

Some Hanna Instruments products are custom-made or built to order. Shipping will occur once the product is ready.
In the event of backorders, you may request partial shipments.
Delays beyond our control (e.g., material shortages, import delays, or carrier issues) may occasionally occur.

HI931 Potentiometric Titrator Instruction Manual

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