Introduction
The HORIBA LAQUA 300 Series is a range of smart handheld water quality meters designed for accurate, versatile water analysis in laboratories and the field. Depending on the sensor configuration, the series measures pH, ORP, dissolved oxygen (DO), conductivity, resistivity, total dissolved solids (TDS), salinity and selected ions. Its modular design allows you to choose the measurement parameters you need, with single, dual and triple-channel models capable of measuring multiple parameters simultaneously.
Built for demanding environments, the LAQUA 300 Series combines a large colour display, intelligent sensor recognition, extensive data logging and flexible data transfer. With an IP67-rated waterproof and dustproof housing, it is designed to deliver reliable performance in both field and laboratory applications.

LAQUA WQ-300 Series Smart Handheld Water Quality Meters
Which model is right for you?
| Model | Description |
| LAQUA WQ-310-K | Single-channel handheld meter. Suitable for measuring one parameter at a time, depending on the selected sensor configuration. |
| LAQUA WQ-320-K | Dual-channel handheld meter. Allows two parameters to be measured simultaneously, depending on the connected sensors. |
| LAQUA WQ-330-K | Triple-channel handheld meter. Allows up to three parameters to be measured simultaneously, making it suitable for more comprehensive water quality monitoring. |
Note: Sensor heads, electrodes and accessories depend on the selected kit configuration. Confirm the required parameters and supplied sensors when ordering.
Why choose the LAQUA 300 Series?
- Simultaneous measurements: Dual- and triple-channel models allow multiple parameters to be measured at the same time.
- Large colour display: The backlit graphic screen makes readings easy to view.
- Rugged and portable: IP67 waterproof and dustproof protection, with a shock-resistant, scratch-resistant and non-slip housing.
- Smart sensor recognition: The meter automatically recognizes compatible connected sensors and displays relevant sensor information.
- Reliable data management: Stores up to 10,000 data points with date and time stamps, with automatic or manual data logging.
- Flexible data transfer: Transfer data via USB or wireless communication, with printer communication also supported.
- Convenient operation: Features Auto Stable, Auto Hold and Real Time measurement modes, a built-in foldable stand and battery or USB power options.
Applications
- Environmental monitoring of surface water, groundwater and industrial effluent
- Drinking water quality testing and wastewater treatment
- Industrial process water, boiler and cooling tower monitoring
- Laboratory quality control and research
- Aquaculture, fish farming and hatchery water management
- Food and beverage production
- Pharmaceutical and other laboratory applications
- Monitoring selected ions in water using compatible ion sensors
Find the right LAQUA 300 Series for your laboratory
Whether you need routine pH checks or simultaneous monitoring of multiple water quality parameters, the HORIBA LAQUA 300 Series offers flexible configurations to suit your application.
Contact Applied Analytical Systems Ltd. (AASL) for assistance in selecting the right model, sensors and accessories for your water quality testing requirements.
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