ProQuatro Multiparameter Meter


Measures a wide variety of parameters:

  • Dissolved Oxygen
  • Conductivity
  • Specific Conductance
  • Salinity
  • Resistivity
  • Total Dissolved Solids (TDS)
  • pH
  • ORP
  • pH/ORP combination
  • Ammonium (ammonia)
  • Nitrate
  • Chloride
  • Temperature

Also a powerful lab instrument for BODs, pH and ORP.

EPA approved for drinking water and wastewater compliance reporting.

SKU: 131204 Categories: ,


ProQuatro Multiparameter Meter

ProQuatro Multiparameter Meter

The Toughest, Smartest, Most Versatile Choice
The ProQuatro handheld multiparameter meter is designed to be your ultimate companion for water quality monitoring, offering a unique combination of ruggedness, intelligent features, and exceptional versatility. This comprehensive guide explores the key features of the ProQuatro in detail, highlighting its strengths and capabilities across various applications.

Built to Endure: Unmatched Field Durability
The ProQuatro is engineered to withstand the harshest field conditions. Here’s what makes it the toughest meter in its class:
IP-67 Waterproof Rating: The ProQuatro boasts an impressive IP-67 rating, meaning it’s completely dustproof and can survive immersion in up to 1 meter of water for 30 minutes, even without the battery cover on.Drop-Tested for Reliability: Rigorous in-house testing procedures include 1-meter drop tests from all angles, ensuring the meter can handle accidental falls without compromising performance.
3-Year Warranty: A generous 3-year warranty demonstrates YSI’s confidence in the ProQuatro’s exceptional build quality.
Military-Grade Connectors: Military-specification connectors ensure secure and reliable connections between the meter and sensors, even in demanding environments.
Rubber Over-Molded Case: The ProQuatro is encased in a protective rubber over-molded case, offering superior shock resistance and a firm grip in wet or gloved hands.
Scratch-Resistant Lens: The display features a scratch-resistant lens for clear visibility under any lighting conditions, even when wearing polarized sunglasses.
Ergonomic Design: The ProQuatro’s ergonomic design allows for comfortable single-handed operation, reducing fatigue during extended testing sessions.
Floats for Easy Retrieval: In case of accidental submersion, the ProQuatro floats, making it easy to retrieve.
Packed with Intelligence: Advanced Features for Streamlined Data ManagementThe ProQuatro goes beyond just taking measurements; it’s a smart instrument that simplifies data collection and management.
On-The-Go USB Port: The ProQuatro boasts a revolutionary On-The-Go USB port, allowing you to directly upload data to a flash drive in the field or lab for seamless data transfer.
Extensive Data Storage: With a 5,000 data set memory, the ProQuatro can store a significant amount of data, eliminating the need for frequent downloads.
Intuitive User Interface: The ProQuatro features a user-friendly, graphic display with an intuitive interface, making it easy to navigate menus and access functions.Backlit Display and Glow-in-the-Dark Keypad: The backlit display ensures clear visibility in low-light conditions, while the glow-in-the-dark keypad allows for easy operation even in complete darkness.
Comprehensive GLP Data: The ProQuatro provides detailed Good Laboratory Practice (GLP) data, including calibration information, time, and date stamps, ensuring data traceability and integrity.
Auto-Stable Function: The auto-stable function automatically determines when readings have stabilized, eliminating the guesswork and ensuring accurate measurements.
Hold All Readings Function: This convenient feature allows you to freeze all readings on the screen simultaneously for easy comparison and recording.
User-Defined Fields: Customize data collection by adding user-defined fields for specific parameters relevant to your project.
Auto-Buffer Recognition: During calibration, the ProQuatro automatically recognizes standard buffer solutions, streamlining the calibration process.
Data IDs for Logging: Assign unique data IDs to your readings for efficient data logging and organization.
User-Upgradable Software: The ProQuatro’s software can be conveniently upgraded via the waterproof USB port, ensuring you always have access to the latest features and bug fixes.
Search Function: Easily locate specific data points using the search function, which allows you to filter user-defined data information.
Cable Management Kit: A cable management kit is included with all cables (from 4 to 30 meters) to keep your cables organized and tangle-free.
Unmatched Versatility: Customizable for Any ApplicationThe ProQuatro’s true strength lies in its exceptional versatility. It can be tailored to meet the specific needs of your water quality monitoring project.
Wide Range of Parameters: The ProQuatro can measure a vast array of parameters, including dissolved oxygen, conductivity, specific conductance, salinity, resistivity, total dissolved solids (TDS), pH, ORP, ammonium, nitrate, chloride, and temperature.Multiple Sensor Options and Cable Lengths: Choose from various user-replaceable sensors and cable lengths (1, 4, 10, 20, and 30 meters)

Additional information


Range: 375 to 825 mmHg

Accuracy: ±1.5 mmHg from 0 to 50 °C

Resolution: 0.1 mmHg


8.3 cm width x 21.6 cm length x 5.6 cm depth (3.27 in x 8.5 in x 2.21 in)

Operating Temperature

-10 to 60 °C


English, Spanish, German, French, Italian, Norwegian, Portuguese, Japanese, Chinese (Simplified and Traditional)


Built-in micro USB port for on-the-go data exports via direct connection to the included USB stick ; user-upgradeable firmware via USB and website


5000 datasets; 50 unique data identifiers


IP-67 (even with battery cover off); floats

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