YSI ProQuatro Water Quality Meter

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ProQuatro Multiparameter Handheld Meter

The ProQuatro is a versatile handheld multiparameter meter designed for both field and laboratory water quality monitoring. Built for flexibility and performance, it measures a wide range of parameters including dissolved oxygen, conductivity, specific conductance, salinity, resistivity, total dissolved solids (TDS), pH, ORP, ammonium, nitrate, chloride, and temperature.

Ideal for environmental monitoring, wastewater, drinking water compliance, and laboratory BOD testing, the ProQuatro is EPA-approved for drinking water and wastewater compliance reporting.

Flexible Multiparameter Monitoring

The ProQuatro is designed for use with the 4-port Quatro cable, allowing users to combine up to four sensors on a single cable for comprehensive sampling. Typical configurations include temperature/conductivity, dissolved oxygen, and two ISE sensors such as pH, ORP, ammonium, nitrate, or chloride.

Its modular design allows for easy customisation, making it a cost-effective solution for a wide range of water quality applications.

Built for Field & Lab Use

Engineered for demanding environments, the ProQuatro features a rugged IP-67 waterproof housing, military-spec connectors, and a weighted, user-replaceable multi-sensor design. Its durable construction is drop-tested from 1 metre at all angles, while the ergonomic design and floating capability make it ideal for field deployment.

Key field-ready features include:

  • Waterproof rubber over-moulded casing (IP-67 rated)

  • Drop-tested for durability

  • Scratch-resistant display, viewable with polarised glasses

  • Ergonomic one-handed operation

  • Instrument floats for added field safety

  • Backlit display and glow-in-the-dark keypad

  • Cable management kit included with 4–30 metre cables

Advanced Data Management & Calibration

The ProQuatro offers powerful onboard data handling and calibration features to improve efficiency and traceability in the field or lab.

  • Stores up to 5,000 data sets

  • Interval or single-event logging

  • 50 Data ID tags for organised sampling

  • Detailed GLP data recording

  • On-the-go USB data export

  • 6-point calibration with auto-buffer recognition

  • Auto-stable prompts and recalibration reminders

  • User-upgradeable software via waterproof USB connection

Key Features & Benefits

  • Measures multiple water quality parameters in a single handheld

  • Compatible with Professional Series field and lab cables

  • Multiple cable lengths available from 1 to 30 metres (up to 100 metres for DO-only applications)

  • Choice of user-replaceable DO sensors (polarographic or galvanic)

  • Lab-grade ISE sensors and BOD probe options available

  • Adjustable left- or right-handed strap

  • Multi-language support

  • Wide range of accessories available

Each ProQuatro purchase includes the handheld instrument, manual, batteries, USB cable, and USB flash drive. Cables and probes are purchased separately to allow full system customisation.

Backed by a 3-year instrument warranty and 2-year cable warranty, the ProQuatro is a reliable and adaptable solution for cost-effective water quality monitoring.

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