In the lab, in the field
or anywhere you need it

Portable pH/Water Quality Meter

We’ve used our unrivalled experience together with detailed feedback from hundreds of customers to develop LAQUA, our most outstanding range of laboratory meters yet.

Benchtop pH/Water Quality Analyzer LAQUA

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Your lab-in-a-pocket

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Whatever your needs

LAQUA is your indispensable partner for maintaining water
quality and contributing to a safe and healthy society.
From 1950, when HORIBA pioneered glass electrode pH meters in Japan,
we have been continuously evolving to meet customers' requirements
with the latest technology.

If you are looking for a versatile product with high technology and accuracy,
LAQUA is the best choice for you.

LAQUA Electrode Technology


Product Lineup

Benchtop pH/Water Quality Analyzer LAQUA

Stress-free measurement, high-end model. Water quality analysis is repeatedly performed in laboratories on a daily basis. Our high-end benchtop model was developed to provide simplicity with excellent on-site usability - from operation and maintenance through to troubleshooting.

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Portable pH/Water Quality Meter LAQUAact

pH/ORP/Ion/Conductivity/Dissolved Oxygen - In the lab, in the field or anywhere you need it. Designed for use with one hand and with an IP67 waterproof rating and shock-resistant casing, this meter can be used for long periods, even in dark places, making it ideal for field measurements in rivers and lakes.

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Compact Water Quality Meter LAQUAtwin

Your lab-in-a-pocket. HORIBA's unique compact meter integrates the electrode, display and sample container to enable simple, effective on-site testing by direct measurement from a single drop.

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Electrodes, Accessories & Spare Parts

Various electrodes to match any application. A wide range of products for both benchtop and portable systems are available, including easy and reliable standard models, application-focused models for small samples or large containers, and special electrodes for specific sample characteristics.

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All About pH & Water Quality

pH   Conductivity   Ion
Other stories

From basic explanations through to applied technologies, from beginner through to expert, it offers enjoyable and educational content to readers.

Member Support

Member Benefits
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Our support website is available for registered customers and features: Data collection software, Instruction manual downloads, Measurement tips, etc.

Worldwide Offices

For Japan


HORIBA, Ltd. Head Office / Factory
2, Miyanohigashi,
Minami-Ku Kyoto 601-8510 Japan
work +81 75 313 8121
work fax +81 75 321 8312

For North, Central and South America Area

Irvine, California (Headquarters)

HORIBA Instruments Incorporated Head Office
9755 Research Drive
Irvine California 92618 USA
work +1 949 250 4811
work fax +1 949 250 0924, +1 949 468 1890

For Southeast Asia,China,Korea,Taiwan,India,Oceania


HORIBA Instruments (Singapore) Pte Ltd. West Office
83 Science Park Drive, #02-02A,
The Curie 118258 Singapore
work +65 6 908 9660
work fax +65 6 745 8155

For Europe, Africa, Russia and Middle East Area


Registered Office

Kyoto Close
Moulton Park
Northampton NN3 6FL UK
work +44 (0)1604 542 500
work fax +44 (0)1604 542 699

Service for Members

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When you Register, You Will Receive:

  • Sample software download for free! 
  • Technical documents
  • Newsletters
  • Warranty documents
  • Answers for frequently asked questions and technical information