YSI Pro Quatro Multiparameter Water Quality Kit w/ 4M DO / Cond / pH / ORP


SKU: ysiquatro
Available for pre-order

Web Information

The ProQuatro handheld multiparameter meter measures a variety of combinations of dissolved oxygen, conductivity, specific conductance, salinity, resistivity, total dissolved solids (TDS), pH, ORP, pH/ORP combination, ammonium (ammonia), nitrate, chloride and temperature. Also a very powerful lab instrument for BODs, pH and ORP.

EPA approved for drinking water and wastewater compliance reporting.

The ProQuatro was designed with the 4-port Quatro cable in mind. Combine 4 sensors on a single cable for comprehensive multiparameter sampling to measure temperature/conductivity, DO, and any two ISEs among pH, ORP, ammonium, chloride, or nitrate. Pairing the ProQuatro with the 4-port cable creates an extremely powerful handheld multiparameter water quality instrument.


The ProQuatro meter meets the demands of true field work. Made from ultra-rugged components to withstand harsh field conditions, the instrument is rated to IP-67 standards even without the battery cover on. Other tough features include a 3-year warranty, Mil-spec connectors, rubber over-molded case, scratch-resistant lens, and a 2-year cable warranty. In-house testing procedures also include 1-meter drop tests from all angles to ensure expected field-durability.

Tough, Field Durability Features Include:

  • Rubber, over-molded IP-67 waterproof case (even without the battery cover)*
  • Drop-tested 1 meter at all angles*
  • 3-year instrument warranty
  • 2-year cable warranty*
  • Rugged cables, sensors, and military-spec connectors*
  • Weighted, user-replaceable multi-sensor design
  • Easy-to-install cable weights; can be daisy-chained for additional weight*
  • Scratch-resistant lens; viewable even with polarized glasses
  • Ergonomic design is easy to hold with one hand
  • Instrument floats


With the addition of the On-The-Go USB port, ProQuatro is one of the smartest instruments in the Professional Series. Simply connect a flash drive and upload data directly in the lab or the field. Numerous benefits include the following features; 5,000 data-set memory, backlit display, glow-in-the-dark keypad, graphic display with intuitive interface, re-cal prompts, user defined fields, detailed GLP, auto stable, Hold All Readings function, USB connection, auto-buffer recognition, and Data IDs for logging data.

Smart Features Include:

  • 5,000 data set memory
  • Intuitive interface
  • Interval or single-event logging
  • 50 Data IDs*
  • Detailed GLP data
  • On-The-Go USB port for simple data management
  • USB connection also powers the instrument
  • 6-point cal with auto-buffer recognition*
  • User-adjustable auto-stable with prompts*
  • User-upgradeable software via waterproof USB port
  • Recalibration prompts
  • Search function filters user-defined data information*
  • Backlit display
  • Glow-in-the-dark keypad
  • Cable management kit included with all cables from 4- to 30-meters*

Most Versatile

ProQuatro is easily customized to be the ideal choice for low-cost water quality sampling. Connect the ProQuatro handheld to any Professional Series cable and probe option for parameter options including dissolved oxygen, conductivity, specific conductance, salinity, resistivity, total dissolved solids, pH, ORP, ammonium, nitrate, chloride, and temperature.

Cable options range from 1-, 4-, 10-, 20-, and 30-meter choices (up to 100-meters on DO only cables) and the convenient cable management kit to keep everything simple and organized. Use lab or field probes and switch between the two quickly. The ProQuatro makes an ideal lab BOD instrument with the proven self-stirring BOD probe (EPA Approved).

A convenient handstrap can be used on either side of the instrument. A complete family of accessories also increase the versatility of the ProQuatro and help get the job done right. Choose among accessories including carrying cases, flow cells, cable weights, belt clip, tripod, and c-clamp.

Added Versatility Features Include:

  • Multiple parameter options and cable lengths
  • Multiple user-replaceable sensor options and a choice of DO sensors*
  • Lab-grade ISE sensors and BOD probe available to make a true lab/field instrument
  • Adjustable right- or left-handed hand strap*
  • Languages - English, Spanish, German, French, Italian, Norwegian, Portuguese, Japanese, Chinese (Simplified and Traditional)
  • Wide array of accessories are available from flow cells, to shoulder straps, to carrying cases



Received from a working laboratory environment.  Sold with warranty. 


  • YSI Pro Quatro Multiparameter meter
  • 4M Cable
  • YSI Quatro ISE-ISE-DO-COND with sensors
  • (2) new C cell alkaline batteries installed
  • USB cable
  • Cable winding device
  • Nylon carry case
  • Manual
  • Assorted accessories



30 Day warranty. We pledge to offer the best service and warranty to all of our customers!  We are extending a 30 Day warranty on this item. This is our way of saying thank you for allowing us to serve you.


This is a genuine product from this manufacturer.


The sale of this item may be subject to regulation by the U.S. Food and Drug Administration and state and local regulatory agencies. the item is subject to FDA regulation, we will verify your status as an authorized purchaser of this item before shipping of the item."

Regardless of the origin of the equipment, documentation provided or identification appearing upon the equipment, the equipment described and offered here is in no way certified for, recommended for, or offered for any specific use. The purchaser agrees that the seller shall not be held responsible or liable for any injuries or damages, whether incidental or consequential, associated in any way with the equipment. The purchaser, by bidding on this equipment, indicates their acknowledgment of, and agreement to the terms of this disclaimer. it is the purchaser's responsibility to have the item inspected and certified by a qualified professional before use!