HORIBA LAQUA 200 Series: The Professional Handheld Water Quality Meter for Lab & Field

June 16, 2026

Built for professionals who cannot afford unreliable data

Whether you are a quality technician verifying process water on a production line, an environmental scientist sampling river water in wet weather, or a research chemist measuring pH in the laboratory, one thing is non-negotiable: the instrument in your hand must deliver accurate, repeatable results every time.

The HORIBA LAQUA 200 Series was designed specifically to meet that standard, combining the precision and data management features demanded by regulated laboratory environments with the physical toughness required for genuine field use. The series was developed with a variety of end-users in mind, including those working in agricultural, environmental, food and drink, manufacturing, water, and wastewater industries, and the demanding conditions under which meters must frequently operate.

Download LAQUA 200 Series Brochure

Series Overview - 10 models, one design philosophy

The series comprises 10 meters, all of which are robust, easy to use and represent great value for money. Between them, the models measure water quality parameters including pH, electrical conductivity (EC), dissolved oxygen (DO), oxidation-reduction potential (ORP) and total dissolved solids (TDS). Dedicated meters are available for each parameter, plus multiparameter meters too.

All ten models share a common hardware platform, the same IP67-rated polycarbonate and TPE housing, the same 50 × 50 mm backlit monochrome LCD, the same built-in electrode holder, and the same two AA battery power system. This consistency means that field teams can mix models within a programme without retraining, and electrode compatibility is maintained across the range.

Learn More

Who uses the HORIBA LAQUA 200 Series

The 200 Series is designed to serve professionals across three primary sectors where water quality measurement is a daily operational requirement, not an occasional task. Each sector places different demands on the instrument and the 200 Series addresses all of them.

  • Industrial Manufacturing & Utilities – Process water quality control in food and beverage, pharmaceuticals, chemicals and manufacturing. CIP validation pH checks. Cooling water conductivity and TDS monitoring. Boiler feed water quality. Wastewater pre-treatment screening against EPA discharge licence parameters.
  • Environmental Monitoring & Consultancy – River, stream, and estuary water quality surveys. Groundwater borehole sampling. Industrial effluent compliance monitoring. Leachate testing at waste facilities. Agricultural runoff and drainage water screening. EPA water quality reporting under IED and Water Framework Directive licence conditions.
  • Research & Laboratory Science – Academic and industrial research requiring GLP-compliant data records. Aquaculture research and water quality optimisation. Soil and sediment pore water analysis. Ecological and biological research requiring dissolved oxygen and pH in controlled and natural environments. QC in analytical laboratories.
  • Water & Wastewater Treatment – Routine sampling and compliance monitoring at water treatment plants and wastewater treatment facilities managed by Irish Water and local authorities. Group Water Scheme operators requiring multi-parameter testing from a single, easy-to-use handheld instrument.
Request A Demo

80 years of specialising in high-performance measurement

About Horiba

Horiba is a world-renowned manufacturer of high-precision analytical and scientific measurement systems.

Since its inception, the global Japanese company has established itself as a global leader in providing advanced technology for a wide array of industries, including environmental monitoring, automotive research, medical diagnostics, and semiconductor manufacturing.

Horiba
Overview of Horiba LAQUA Product Offering

Product Overview

WQ-300 Series

A smart handheld water quality monitoring for Irish field teams.

LAQUA 200 Series

High-performance handheld meters for pH, Conductivity, and Dissolved Oxygen. Ergonomic design with IP67 waterproofing.
Learn More

U-50 Series

The U-50 Series allows for simultaneous measurement of up to 11 parameters. Robust, submersible, and ideal for borehole and environmental monitoring.
Learn More

LAQUA-PC210-K

Simple to use handheld kit with automatic calibration and 500-reading data memory.
Learn More

LAQUAtwin-PH-22

The only pocket meter that directly measures pH in 0.1ml sample (or 0.05ml sample with sampling sheet B).
Learn More

LAQUAtwin 4EC-22

The only pocket meter that directly measures conductivity in 0.12ml sample. No need for a beaker to calibrate your meter or measure a sample.
Learn More

LAQUAtwin ORP-11

The World’s First Pocket-Sized ORP and Eh Meter
Learn More

4M LAQUAtwin kit

The LAQUAtwin 4M kit offers extreme flexibility, designed to give you optimal configuration options and ensuring you have all test equipment and solutions at hand when needed.
Learn More