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YSI ProQuatro Multiparameter Meter

Updated:2025-03-13

Brand:YSI
Model：ProQuatro
Description: 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
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Product Details

ProQuatro Multiparameter Meter Introduction：

user's manual datasheet

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.

The highlights of the ProQuatro Multi-Parameter Meter include：

Toughest

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

Smartest：

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

Specifications：

Barometer	Range: 375 to 825 mmHg Accuracy: ±1.5 mmHg from 0 to 50 °C Resolution: 0.1 mmHg
Cable Options	Standard lengths of 1, 4, 10, 20 or 30 meters with single port, dual port or Quatro cables, Lab Cables: BOD sensor includes 2-meter cable; 1 or 4 meters on lab pH, ORP and pH/ORP cables
Certifications	RoHS, CE, FCC
Country of Origin	Assembled in the USA
Display	Backlit, graphic display
Languages	English, Spanish, German, French, Italian, Norwegian, Portuguese, Japanese, Chinese (Simplified and Traditional)
Logging Capabilities	Single point or continuous with autostable feature
Memory	5000 datasets; 50 unique data identifiers
Operating Temperature	-10 to 60 °C
Power	2 alkaline C-cells provide 80 continuous hours at ambient temperature without backlight; USB power or optional wall power can be supplied via micro USB port
Response Time	2.0 mil PE = 17 seconds and 3 in/sec flow, 1.25 mil PE = 8 seconds and 6 in/sec flow, 1 mil Teflon® = 18 seconds and 12 in/sec flow
Size	8.3 cm width x 21.6 cm length x 2.3 cm depth (3.25 in. x 8.5 in. x 2.25 in.)
Storage Temperature	-20 to 70 °C
USB	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
Warranty	3-year instrument; 2-year cable
Waterproof	IP-67 (even with battery cover off); floats
Weight	475 grams (1.05 lbs.) with batteries