ProQuatro Multiparameter Meter

5 Reasons to Upgrade from Pro Plus to ProQuatro

Since 2006, the Professional Plus has set the industry standard for water quality sampling, but the time has come for us to say farewell and move toward the future. Now, as the 2021 field season approaches, we are excited to crown the ProQuatro, YSI’s latest handheld in the Professional Series line, as the new successor to the Pro Plus throne.

Price$1,140.00 (US Only)

SKU606950


In Stock 74

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.

Handheld instrument Only.  Cables, probes/sensors, and accessories sold separately.

  • Order Meter
    SKU Description Price Quantity
    606950 ProQuatro Multiparameter Instrument $1,140.00
  • Order Cables
    SKU Description Price Quantity
    605109 Pro Series Lab pH/ORP Sensor with 1 M Cable $319.00
    605179 Pro Series Lab pH/ORP Sensor with 4 M Cable $340.00
    6051020-1 Pro Series pH/ORP/ISE and DO Cable - 1 m $601.00
    6051020-4 Pro Series pH/ORP/ISE and DO Cable - 4 m $622.00
    6051020-10 Pro Series pH/ORP/ISE and DO Cable - 10 m $680.00
    6051020-20 Pro Series pH/ORP/ISE and DO Cable - 20 m $779.00
    6051020-30 Pro Series pH/ORP/ISE and DO Cable - 30 m $904.00
    60510-1 Pro Series pH/ORP/ISE Cable - 1 m $281.00
    60510-4 Pro Series pH/ORP/ISE Cable - 4 m $281.00
    60510-10 Pro Series pH/ORP/ISE Cable - 10 m $327.00
    60510-20 Pro Series pH/ORP/ISE Cable - 20 m $393.00
    60510-30 Pro Series pH/ORP/ISE Cable - 30 m $505.00
    605780 ProBOD - Pro Series BOD Probe $755.00
    605178 Pro Series Lab ORP (Redox) Sensor with 4 M Cable $250.00
    605108 Pro Series Lab ORP (Redox) Sensor with 1 M Cable $210.00
    6051030-4 Pro Series pH/ORP/ISE and Conductivity Cable - 4 m $518.00
    6051030-1 Pro Series pH/ORP/ISE and Conductivity Cable - 1 m $499.00
    6051030-10 Pro Series pH/ORP/ISE and Conductivity Cable - 10 m $565.00
    6051030-20 Pro Series pH/ORP/ISE and Conductivity Cable - 20 m $628.00
    6051030-30 Pro Series pH/ORP/ISE and Conductivity Cable - 30 m $758.00
    60530-1 Pro Series Conductivity Sensor with 1 M Cable $345.00
    60530-4 Pro Series Conductivity Sensor with 4 M Cable $355.00
    60530-20 Pro Series Conductivity Sensor with 20 M Cable $471.00
    60530-10 Pro Series Conductivity Sensor with 10 M Cable $419.00
    60530-30 Pro Series Conductivity Sensor with 30 M Cable $586.00
    60520-1 Pro Series DO Cable - 1 m $262.00
    60520-4 Pro Series DO Cable - 4 m $278.00
    60520-10 Pro Series DO Cable - 10 m $330.00
    60520-20 Pro Series DO Cable - 20 m $393.00
    60520-30 Pro Series DO Cable - 30 m $497.00
    60520-100 Pro Series DO Cable - 100 m $785.00
    6051010-1 Pro Series Dual pH/ORP/ISE Cable - 1 m $601.00
    6051010-10 Pro Series Dual pH/ORP/ISE Cable - 10 m $663.00
    6051010-4 Pro Series Dual pH/ORP/ISE Cable - 4 m $611.00
    6051010-30 Pro Series Dual pH/ORP/ISE Cable - 30 m $889.00
    6051010-20 Pro Series Dual pH/ORP/ISE Cable - 20 m $779.00
    605107 Pro Series Lab pH Sensor with 1 M cable $199.00
    605177 Pro Series Lab pH Sensor with 4 M cable $210.00
    6052030-4 Pro Series DO/Conductivity Sensor with 4 M Cable $680.00
    6052030-1 Pro Series DO/Conductivity Sensor with 1 M Cable $663.00
    6052030-20 Pro Series DO/Conductivity Sensor with 20 M Cable $795.00
    6052030-10 Pro Series DO/Conductivity Sensor with 10 M Cable $737.00
    6052030-30 Pro Series DO/Conductivity Sensor with 30 M Cable $900.00
    605790-1 Pro Quatro Cable with Conductivity/Temperature Sensor, 1 M $1,439.00
    605790-10 Pro Quatro Cable with Conductivity/Temperature Sensor, 10 M $1,536.00
    605790-4 Pro Quatro Cable with Conductivity/Temperature Sensor, 4 M $1,474.00
    605790-20 Pro Quatro Cable with Conductivity/Temperature Sensor, 20 M $1,653.00
    605790-30 Pro Quatro Cable with Conductivity/Temperature Sensor, 30 M $1,794.00
  • Order Sensors
    SKU Description Price Quantity
    605105 1005 - Pro Series Chloride Sensor (ISE) $385.00
    605203 2003 - Pro Series Polarographic Dissolved Oxygen Sensor $194.00
    605202 2002 - Pro Series Galvanic Dissolved Oxygen Sensor $194.00
    605106 1006 - Pro Series Nitrate Sensor (ISE) $385.00
    605101 1001 - Pro Series pH Sensor (ISE) $184.00
    605103 1003 - Pro Series pH/ORP Sensor (ISE) $310.00
  • Order Standards and Solutions
    SKU Description Price Quantity
    003885 Nitrate Standard, 1 mg/L (500mL) $88.00
    003886 Nitrate Standard, 10 mg/L (500mL) $88.00
    003887 Nitrate Standard, 100 mg/L (500mL) $88.00
    005580 5580 - Confidence Solution to verify pH, ORP and conductivity data (not for calibration) $111.00
    003821 pH 4 Buffer (box of 6 pints) $85.00
    003822 pH 7 Buffer (box of 6 pints) $85.00
    603824 pH Buffer Assorted Case (2 ea pints of 4, 7, 10) $85.00
    003823 pH 10 Buffer (box of 6 pints) $85.00
    003842 Ammonium Cal Solution, 10 mg/L (500mL) $88.00
    003841 Ammonium Cal Solution, 1 mg/L (500mL) $88.00
    003843 Ammonium Cal Solution, 100 mg/L (500mL) $88.00
    061320 061320: 125 mL Zobell Solution $36.00
    061321 061321: 250 mL Zobell Solution $53.00
    061322 061322: 500 mL Zobell Solution $80.00
  • Order Accessories
    SKU Description Price Quantity
    603078 3078 - Flow Cell Adaptor-Single Port $106.00
    605978 5978 - 4.9 oz weight $29.00
    603059 3059 - Flow Cell, Standard, 203 mL (2 port cable assembly) $372.00
    603075 3075 - Pro Series Soft Sided Carrying Case $132.00
    603062 3062 - Cable management kit (included with any cable 10, 20, or 30-meters long $19.00
    063019 690 - Weight, Probe/Cable, 24 oz, 3" $164.00
    603069 3069 - Belt clip (screws into back of meter) $30.00
    603077 3077 - Flow Cell Kit, 1 or 2 Port Sensor $407.00
    603070 3070 - Shoulder strap $33.00
    603056 3056 - Flow cell mounting spike $32.00
    606850 6850 - Quatro Cable Flow Cell $407.00
    063020 691 - Weight, Probe/Cable, 51 oz, 6" $201.00
    626444 6444 - Pro Series Lab Dock $49.00
    063507 4654 - Tripod (screws into back of meter) $32.00
    603074 3074 - Pro Series Hard Sided Carrying Case $308.00
    603162 6262 - Pro Series Soft Sided Small Carrying Case $96.00
    063517 614 - Ultra clamp (screws into back of meter) $26.00
Add to Cart
  • Overview

    Read more about why you should upgrade from Pro Plus to ProQuatro.

    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.

    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

    When purchasing the ProQuatro you will receive the instrument, manual, batteries, USB cable, and USB flash drive. Cables and probes are ordered separately.

    * feature or benefit only YSI offers on a handheld instrument.

  • 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
  • Accessories

    Pro Series Laboratory pH/ORP Sensor

    pH, ORP, and temperature single junction combination electrode with cable and MS connector

    Weight, Probe/Cable, 4.9 oz

    Weight, Probe/Cable, 4.9 oz

    Pro Series pH/ORP/ISE and DO Field Cable

    YSI 1020 Cable - pH/ORP/ISE, temperature, and dissolved oxygen cable assembly

    Nitrate Standard

    Nitrate Standard

    Pro Series pH/ORP/ISE Field Cable

    YSI 10 Cable - pH/ORP/ISE and temperature cable assembly

    Pro Series 1005 Chloride ISE Sensor

    YSI 1005 Chloride ISE sensor for the Pro Series

    Pro Series Soft Sided Carrying Case

    Carrying Case, Soft Sided

    Pro Series BOD Probe

    Self-stirring BOD probe for use with the Pro20 and Pro Plus

    5580 Confidence Solution (case of 6 pints)

    5580 Confidence Solution (case of 6 pints)

    pH Buffer

    pH Buffer

    Pro Series Laboratory Grade ORP (Redox) Sensor

    ORP and temperature single junction combination electrode with cable and MS connector

    Pro Series Polarographic Dissolved Oxygen Sensor

    YSI 2003 Polarographic Dissolved Oxygen sensor for the Pro Series (Yellow Membrane Kit)

    Pro Series 1004 Ammonium ISE, NH4+ Sensor

    YSI 1004 ammonium, NH4+ sensor for the Pro Series

    Conductivity Calibrator Solution

    Conductivity Calibrator Solution

    Pro Series pH/ORP/ISE and Conductivity Field Cable

    YSI 1030 Cable - pH/ORP/ISE, temperature, and conductivity cable assembly

    Belt Clip

    Belt Clip

    Pro Series 1002 ORP Sensor

    YSI 1002 ORP (redox) sensor for the Pro Series

    Shoulder Strap

    Shoulder Strap

    Pro Series Dissolved Oxygen/Temperature Field Cable

    YSI 20 Cable - DO and temperature cable assembly

    Ammonium Standard

    Ammonium Calibration Solution

    Cap Membrane Kit 1.00 Mil Teflon

    Cap Membrane Kit 1.00 Mil Teflon (6 each), includes electrolyte (black cap)

    Pro Series Dual pH/ORP/ISE Field Cable

    YSI 1010 Cable - Dual pH/ORP/ISE and temperature cable assembly

    Flow Cell Quatro

    Flow Cell for the Pro Series Quatro cable

    Pro Series Galvanic Dissolved Oxygen Sensor

    YSI 2002 Galvanic Dissolved Oxygen sensor for the Pro Series

    Pro Series 1006 Nitrate ISE Sensor

    YSI 1006 Nitrate ISE for the Pro Series

    Pro Series 1001 pH Sensor

    pH sensor for the YSI Professional Series

    Cap Membrane Kit 1.00 Mil Teflon

    Cap Membrane Kit 1.00 Mil Teflon (6 each), includes electrolyte (black cap)

    Pro Series Laboratory Grade pH Sensor

    pH and temperature single junction combination electrode with cable and MS connector

    Pro Series DO/Conductivity Field Cable

    YSI 2030 Cable - DO, conductivity, and temperature cable assembly

    Tripod Clamp

    Tripod Clamp

    Pro Series Quatro Field Cable

    4-port Quatro Cable - Dissolved Oxygen, Conductivity/Temperature, and Dual ISE cable assembly.

    Pro1003A Amplified pH/ORP Combo Sensor

    1003A Amplified pH/ORP Combo Sensor

    Pro Series Hard Sided Carrying Case

    Carrying Case, Hard Sided

    Pro Series Soft Sided Small Carrying Case

    Carry Case, Soft Sided, Small

    Pro1001A Amplified pH Sensor

    1001A Amplified pH Sensor

    Pro1001A Amplified pH Sensor Kit

    1001A Amplified pH Sensor Kit*

    Ultra Clamp

    Ultra Clamp

    Zobell Solution, ORP Calibrator

    Zobell Solution, ORP Calibrator

  • How to Order

    Step 1: Order Instrument

    SKU Description
    606950 Instrument, includes batteries, USB cable, and USB flash drive.

    Step 2: Order Cable(s)

    SKU Description
    60510 1, 4, 10, 20 or 30 meter: ISE*/temp
    60520 1, 4, 10, 20, 30 or up to100 meters**: DO/temp
    60530 1, 4, 10, 20 or 30 meter: conductivity/temp
    6051010 1, 4, 10, 20 or 30 meter: ISE/ISE/temp
    6051020 1, 4, 10, 20 or 30 meter: ISE/DO/temp
    6051030 1, 4, 10, 20 or 30 meter: ISE/conductivity/temp
    6052030 1, 4, 10, 20 or 30 meter: DO/conductivity/temp
    605790 1, 4, 10, 20 or 30 meter: ISE/ISE/DO/conductivity/temp
    605107 1–meter single junction pH sensor & cable
    605177 4–meter single junction pH sensor & cable
    605108 1–meter single junction ORP sensor & cable
    605178 4–meter single junction ORP sensor & cable
    605109 1–meter single junction pH/ORP sensor & cable
    605179 4–meter single junction pH/ORP sensor & cable

    Step 3: Order Sensor(s)

    SKU Description
    605202 Galvanic DO
    605203 Polarographic DO
    605780 Self-stirring BOD (2-meter cable included)
    605101 pH (ISE)
    605102 ORP (ISE)
    605103 pH/ORP combination (ISE)***
    605104 Ammonium (ISE)
    605105 Chloride (ISE)
    605106 Nitrate (ISE)

    * ISEs include pH, ORP, Ammonium, Nitrate, Chloride
    ** Special order cables in 10-meter increments up to 100 meter available
    *** Not recommended on 6051010 or 605790 cables. Only pH would appear.

  • Video

    5 Reasons to Upgrade from Pro Plus to ProQuatro

    Since 2006, the Professional Plus has set the industry standard for water quality sampling, but the time has come for us to say farewell and move toward the future. Now, as the 2021 field season approaches, we are excited to crown the ProQuatro, YSI’s latest handheld in the Professional Series line, as the new successor to the Pro Plus throne.

You may also need

Pro Series pH/ORP/ISE and DO Field Cable

YSI 1020 Cable - pH/ORP/ISE, temperature, and dissolved oxygen cable assembly

$601.00 - $904.00

Pro Series Soft Sided Carrying Case

Carrying Case, Soft Sided

$132.00

Pro Series Polarographic Dissolved Oxygen Sensor

YSI 2003 Polarographic Dissolved Oxygen sensor for the Pro Series (Yellow Membrane Kit)

$194.00

ProDSS Multiparameter Digital Water Quality Meter

The Ultimate Sampling Handheld. Portable Digital Meter for DO, Conductivity, Salinity, TDS, pH/ORP, Turbidity, Algae, Temperature and more

$1,683.00 - $2,204.00

Pro Series Quatro Field Cable

4-port Quatro Cable - Dissolved Oxygen, Conductivity/Temperature, and Dual ISE cable assembly.

$1,439.00 - $1,794.00