HORIBA LAQUA Series Water Quality Meters Catalog 2025-2026

Introduction to HORIBA LAQUA Series

Since developing Japan's first glass electrode pH meter in 1950, HORIBA has continuously provided innovative solutions with next-generation technology. The LAQUA brand represents HORIBA's highest quality water quality meters, designed to meet detailed measurement needs with accumulated expertise and advanced technology.

Manufacturing Technology: The Essence of Processing and Manufacturing Technology

HORIBA offers a diverse range of glass electrodes with various shapes to accommodate different containers and samples, enhancing ease of use and measurement styles. This is made possible by HORIBA's long-cultivated manufacturing technology, which achieves unique structures and continuous improvements for high quality.

Key technological advancements include:

Thick Film Technology: Achieves 10 times the strength of JIS standards. Applicable electrodes include 9615S-10D, 9618N-10D, 9680S-10D, 9681S-10D. Features a dome-shaped new structure for enhanced strength in all directions.
Micro-fabrication Technology: Integrates glass electrodes into less than 1mm thickness, with a 3mm diameter glass double tube incorporating a temperature compensation sensor. Applicable electrode: 9618N-10D (Awarded the "Invention Prize" at the 2011 National Invention Awards).
Flat-Tip Technology: Integrates cylindrical glass electrodes into less than 1mm thickness. Applicable for LAQUAtwin sensors.

Material Technology: The Crystallization of Research and Know-How

The pH response glass part of the glass electrode is crucial for generating electromotive force based on sample pH, significantly impacting response and durability. HORIBA's proprietary glass composition, developed through years of experience in industrial, research, and environmental measurement, is a testament to their expertise.

High-Speed, High-Precision:

Unique rare earth addition enhances response and durability (Patents No. 4857281, No. 5073089). The addition of rare earth elements to the response glass membrane reduces the hydration layer thickness by half, improving response and chemical durability. This also eliminates measurement drift, allowing for reproducible measurements without worrying about timing.

Choosing the Right Instrument: By Usage Scene and Measurement Item

Select the optimal main unit model based on your usage scene and measurement item.

Usage Scene Selection

BENCHTOP (Tabletop): For stress-free, precise measurements in laboratories and analysis rooms. Available in color touch panel (F-70/DS-70 series) and monochrome LCD (F-2000 series) types.
PORTABLE: For reliable measurements in labs or the field, offering ruggedness. Available in color touch panel (WQ-300 series) and monochrome LCD (D-200 series) types.
COMPACT: For simple, compact measurements. LAQUAtwin series offers easy operation.

Measurement Item Selection

Instruments support pH, ORP, Ion, Conductivity, and DO (Dissolved Oxygen).

BENCHTOP Models:

Color Touch Panel Type (F-70/DS-70 Series): F-72 (1-channel pH/ORP/Ion), F-73 (2-channel pH/ORP), F-74 (2-channel pH/ORP/Conductivity/TDS/Salinity/Resistivity), DS-72 (1-channel Conductivity/TDS/Salinity/Resistivity).
Monochrome LCD Type (F-2000 Series): F-2000PI (pH/ORP/Ion), F-2000PC (pH/ORP/Ion/Conductivity/TDS/Salinity/Resistivity), F-2000PD (pH/ORP/Ion/DO), F-2000C (Conductivity/TDS/Salinity/Resistivity), F-2000D (DO).

PORTABLE Models:

Color Touch Panel Type (WQ-300 Series): WQ-310 (1-channel pH/ORP/Conductivity/DO), WQ-320 (2-channel pH/Conductivity or pH/DO), WQ-330 (3-channel pH/Conductivity/DO).
Monochrome LCD Type (D-200 Series): D-210P/D-220P (pH/ORP), D-210C/D-220C (Conductivity/TDS/Salinity/Resistivity), D-210D/D-220D (DO), D-210PC/D-220PC (pH/Conductivity), D-210PD/D-220PD (pH/DO).

COMPACT Models:

LAQUAtwin Series: pH-11B, pH-22B, pH-33B, EC-33B, Na-11, K-11, NO3-11. Supports various ion measurements.

A wide range of electrodes, standard solutions, and cleaning solutions are available.

Selecting the Right Electrode for Your Sample

Choose the best electrode for your sample.

For High Viscosity or Non-Aqueous Samples:

Sleeve ToupH Electrode (9681S-10D): Features a movable sleeve junction that prevents clogging and is easy to clean. Suitable for samples containing solvents or non-aqueous solvents (cosmetics, paints).

For Wide Range of Aqueous Samples:

Standard ToupH Electrode (9615S-10D): Offers quick stabilization and drift elimination, easy maintenance with a dome-type design, and is ideal for buffer adjustments.

For Low Conductivity:

PUREIL Electrode (9600-10D): Uses a newly developed gel ionic liquid salt bridge, providing stable measurements with minimal ionic liquid leakage. Suitable for samples like injections where KCl might cause precipitation.

For Special Samples:

Anti-Fluoride pH Electrode (9631-10D): Enhanced durability against hydrofluoric acid while maintaining low membrane resistance. Long lifespan (approx. 1000 measurements) and easy maintenance.
Anti-Alkali pH Electrode (9632-10D): Strengthened alkali resistance with a new glass membrane, offering approximately 5 times longer stability compared to previous models. Ideal for samples like plating baths.

For Micro-Volume Samples:

Micro ToupH Electrode (9618N-10D): Enables measurement from just 50 µL.

For Solid Surface Measurement:

Flat ISFET pH Electrode (0040N-10D): Designed for measuring solid surfaces.

For Large Containers or Test Tubes:

Long ToupH Electrode (9680S-10D): Features a long and slim body.

Other Electrode Lineups

Explore additional electrode options for various HORIBA meters.

pH Electrodes: Includes GRT pH composite electrodes, plastic body types, refillable/non-refillable types, micro-tip, flat-tip, and standard types.
ORP Electrodes: Waterproof platinum composite types.
Conductivity Electrodes: Immersion types, flow-through types, and specialized cells for low conductivity and pure water.
Ion Electrodes: Combined electrodes for multiple ions (Cl-, F-, NO3-, K+, Ca2+, NH4+) and single ion electrodes.
DO Electrodes: Optical DO sensors for accurate measurements.

Digital sensors for WQ-300 series are also available, featuring sensor heads and interchangeable sensor cartridges.

BENCHTOP Models: F-70/DS-70 Series (Color Touch Panel)

The Ultimate Tabletop Meter, Packed with Features for Accurate Measurement

These meters offer a user-friendly experience with a color touch panel, providing intuitive operation and clear data display.

Accurate Calibration Assistance: The calibration mode assists users by displaying "Stability" and "Graph" to ensure measurements are taken when the value is stable.
Rich Support Functions for Accurate Measurement: Flexible display switching, built-in user guides for troubleshooting, and easy access to maintenance information. Users can switch between digital, graph, and analog displays during measurement.
Troubleshooting Support: Provides clear guidance for calibration or inspection issues, with visual aids for easy problem-solving.
Application Functions for Pharmaceutical Use: Supports USP/EP/JP/CP standards for pharmaceutical measurements.
Data Integrity (DI) Support: Offers software compatible with 21 CFR Part 11 for data management and security.
Automated Calibration and Measurement: Can be connected to an optional auto-sampler for automated calibration, measurement, and electrode cleaning, handling up to 120 samples.

BENCHTOP Models: F-2000 Series (Monochrome LCD)

A Classic Tabletop Meter with Essential Functions for Ease of Use

These monochrome LCD models are designed for straightforward operation and reliable performance.

Easy Calibration and Measurement: Calibration status is indicated by an icon. Once calibration is complete, it automatically switches to measurement mode.
Stability Indication: Icons clearly show the stability of the measurement value.
Electrode Condition Check: An electrode indicator provides a quick status overview (e.g., sensitivity).
One-Touch Mode Switching: Easily switch between measurement modes with dedicated buttons.
PC and Printer Connectivity: Supports connection to PCs and printers for data output.
Recommended for DO Measurement in Laboratories: The F-2000 series is suitable for DO measurements and includes software for BOD value calculation.

PORTABLE Models: WQ-300 Series (Color Touch Panel)

Digital Sensors for Versatile Measurement: One Unit for Multiple Measurements

The WQ-300 series features digital sensors that store measurement information, allowing for multi-component measurements with a single unit.

Maximum 3-Channel Simultaneous Measurement.
Maximum 12-Component Measurement with Sensor Changes.
Digital Sensors: Sensor heads with built-in digital circuits retain measurement information. Sensor cartridges are replaceable for easy maintenance.
NEW: Ion Measurement Capability: Supports cross-check of ion measurements in the field. Features internal liquid-free ion sensors for 5 types of ions (NO3-, K+, Ca2+, Na+, NH4+).
Internal Liquid-Free pH and ORP Sensors: Offer convenience and durability.
Conductivity Sensors: Available in 4-electrode (wide range) and 2-electrode (low conductivity) types.
Optical DO Sensor: High-performance sensor with excellent stability and resistance to flow effects. Features automatic salinity compensation when paired with a conductivity sensor.

PORTABLE Models: D-200 Series (Monochrome LCD)

Rugged Design for Easy, One-Handed Operation in Any Measurement Location

These portable meters are built for durability and ease of use, even in challenging environments.

Easy Operation: Features a simple, three-button interface for one-handed control.
Stability and Electrode Status Indicators: Icons clearly show measurement stability and electrode condition.
Rugged Body: IP67 waterproof and dustproof rating, with a double molding structure for shock resistance and a secure grip.
Large Memory Capacity: Stores up to 1,000 measurements (D-210 series stores 500).
Convenient Electrode Holder: A built-in holder on the meter allows for easy carrying of the electrode.
Backlight: Ensures visibility in dark conditions.
Clear Display: Large characters for easy reading.
Lab-Friendly: Can be used with an optional electrode stand for tabletop convenience. Battery-powered, no AC adapter needed for this function.
Chemical Resistance: The screen is made of polycarbonate resin, resistant to alcohol wiping.
Integrated Stand: A foldable stand on the back improves screen visibility.
Carrying Case Set: Available for convenient storage and transport.

COMPACT Models: LAQUAtwin Series

Simple, Micro-Volume Measurement by Simply Dropping Samples

HORIBA's technology condensed into a compact design for easy micro-volume measurements.

Auto-Stability Function: Automatically holds stable values and displays them.
Wide Range of Measurements: Supports 9 components (pH, Conductivity, Ion, ORP, Salinity, TDS) with 13 models.
Compact and Portable: Easy to carry with a dedicated case.
Waterproof and Dustproof (IP67 Compliant).
Replaceable Sensors: Easy sensor replacement.
Measurement Methods: Suitable for dropping samples (0.1 mL), immersing in beakers, scooping from rivers, measuring solids, and measuring powders.
Specific Models: pH meters (pH-11B, pH-22B, pH-33B), Conductivity meter (EC-33B), Ion meters (Na-11, K-11, NO3-11), and ORP meter.

Electrode Selection Guide

A guide to help select the appropriate electrode based on sample characteristics and container type.

Sample Characteristics: Covers selection based on conductivity, pH range (alkaline, acidic, neutral), temperature changes, viscosity, non-aqueous solvents, suspensions, and solid/semi-solid samples.
Sample Container Selection: Includes options for micro-containers, test tubes, beakers, and large containers.
Representative Samples: Provides recommendations for various sample types including water (pure water, river water, tap water), chemical solutions (acids, bases, solvents), food samples (honey, cheese, meat, fruit), and cosmetics.

HORIBA Support Services

HORIBA offers comprehensive support services to ensure optimal use of LAQUA products.

Technical Support: Phone support and online inquiries for technical consultations.
Certificate Issuance Services (Fee-based): Traceability certificates, inspection certificates, and calibration certificates are available.
Validation Support (Fee-based): Assistance with IQ, OQ, PQ validation and data integrity (21 CFR Part 11 compliance) with specialized software.
YouTube Channel: Features videos on measurement methods, maintenance, and application examples for water quality meters.
ISO/IEC 17025 Accredited Calibration Services: Offers calibration services with internationally recognized symbols.
Product Update Information: Provides information on software updates and new product information.
FAQ and AI Support: An AI-powered FAQ system for quick answers to common questions.

HORIBA Group Management System: HORIBA integrates ISO 9001, ISO 14001, and ISO 45001 for quality, environmental, and occupational health and safety management.

Contact Information:

Technical Support Center: 0120-37-6045
Website: www.horiba.com/jp/contact-us/contact-form/
Water Quality Instruments Website: www.horiba.com/jpn/water-quality/
YouTube Channel: www.horiba.com/youtube-horiba-water/
FAQ Support: www.horiba.com/faq_support/

Manufacturing & Sales: HORIBA Advanced Techno Co., Ltd.

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