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$1,399.00 (US Only)

SKU606950

In Stock 19

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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	$1,399.00

Order Cables

SKU	Description	Price
605109	Pro Series Lab pH/ORP Sensor with 1 M Cable	$371.00
605179	Pro Series Lab pH/ORP Sensor with 4 M Cable	$396.75
6051020-1	Pro Series pH/ORP/ISE and DO Cable - 1 m	$769.50
6051020-4	Pro Series pH/ORP/ISE and DO Cable - 4 m	$800.75
6051020-10	Pro Series pH/ORP/ISE and DO Cable - 10 m	$873.50
6051020-20	Pro Series pH/ORP/ISE and DO Cable - 20 m	$1,003.75
6051020-30	Pro Series pH/ORP/ISE and DO Cable - 30 m	$1,164.75
60510-1	Pro Series pH/ORP/ISE Cable - 1 m	$329.75
60510-4	Pro Series pH/ORP/ISE Cable - 4 m	$329.75
60510-10	Pro Series pH/ORP/ISE Cable - 10 m	$381.25
60510-20	Pro Series pH/ORP/ISE Cable - 20 m	$458.50
60510-30	Pro Series pH/ORP/ISE Cable - 30 m	$587.25
605780	ProBOD - Pro Series BOD Probe	$910.00
605178	Pro Series Lab ORP (Redox) Sensor with 4 M Cable	$288.50
605108	Pro Series Lab ORP (Redox) Sensor with 1 M Cable	$247.25
6051030-4	Pro Series pH/ORP/ISE and Conductivity Cable - 4 m	$659.25
6051030-1	Pro Series pH/ORP/ISE and Conductivity Cable - 1 m	$633.50
6051030-10	Pro Series pH/ORP/ISE and Conductivity Cable - 10 m	$721.00
6051030-20	Pro Series pH/ORP/ISE and Conductivity Cable - 20 m	$798.25
6051030-30	Pro Series pH/ORP/ISE and Conductivity Cable - 30 m	$963.25
60530-1	Pro Series Conductivity Sensor with 1 M Cable	$437.75
60530-4	Pro Series Conductivity Sensor with 4 M Cable	$453.25
60530-20	Pro Series Conductivity Sensor with 20 M Cable	$597.50
60530-10	Pro Series Conductivity Sensor with 10 M Cable	$530.50
60530-30	Pro Series Conductivity Sensor with 30 M Cable	$741.75
60520-1	Pro Series DO Cable - 1 m	$312.00
60520-4	Pro Series DO Cable - 4 m	$332.75
60520-10	Pro Series DO Cable - 10 m	$395.25
60520-20	Pro Series DO Cable - 20 m	$468.00
60520-30	Pro Series DO Cable - 30 m	$598.00
60520-100	Pro Series DO Cable - 100 m	$941.25
6051010-1	Pro Series Dual pH/ORP/ISE Cable - 1 m	$762.25
6051010-10	Pro Series Dual pH/ORP/ISE Cable - 10 m	$844.75
6051010-4	Pro Series Dual pH/ORP/ISE Cable - 4 m	$772.50
6051010-30	Pro Series Dual pH/ORP/ISE Cable - 30 m	$1,132.00
6051010-20	Pro Series Dual pH/ORP/ISE Cable - 20 m	$989.00
605107	Pro Series Lab pH Sensor with 1 M cable	$231.75
605177	Pro Series Lab pH Sensor with 4 M cable	$247.25
6052030-4	Pro Series DO/Conductivity Sensor with 4 M Cable	$873.50
6052030-1	Pro Series DO/Conductivity Sensor with 1 M Cable	$858.00
6052030-20	Pro Series DO/Conductivity Sensor with 20 M Cable	$1,024.50
6052030-10	Pro Series DO/Conductivity Sensor with 10 M Cable	$946.50
6052030-30	Pro Series DO/Conductivity Sensor with 30 M Cable	$1,159.50
605790-1	Pro Quatro Cable with Conductivity/Temperature Sensor, 1 M	$1,833.50
605790-10	Pro Quatro Cable with Conductivity/Temperature Sensor, 10 M	$1,956.00
605790-4	Pro Quatro Cable with Conductivity/Temperature Sensor, 4 M	$1,878.75
605790-20	Pro Quatro Cable with Conductivity/Temperature Sensor, 20 M	$2,111.50
605790-30	Pro Quatro Cable with Conductivity/Temperature Sensor, 30 M	$2,286.75

Order Sensors

SKU	Description	Price
605105	1005 - Pro Series Chloride Sensor (ISE)	$453.25
605203	2003 - Pro Series Polarographic Dissolved Oxygen Sensor	$229.00
605104	1004 - Pro Series Ammonium Sensor (ISE)	$453.25
605102	1002 - Pro Series ORP Sensor (ISE)	$255.00
605202	2002 - Pro Series Galvanic Dissolved Oxygen Sensor	$229.00
605106	1006 - Pro Series Nitrate Sensor (ISE)	$453.25
605101	1001 - Pro Series pH Sensor (ISE)	$213.25
605103	1003 - Pro Series pH/ORP Sensor (ISE) - not recommended for 605790 Quatro Cable or 6051010 ISE/ISE/Temp Cable	$374.50

Order Standards and Solutions

SKU	Description	Price
003885	Nitrate Standard, 1 mg/L (500mL)	$101.00
003886	Nitrate Standard, 10 mg/L (500mL)	$101.00
003887	Nitrate Standard, 100 mg/L (500mL)	$101.00
005580	5580 - Confidence Solution to verify pH, ORP and conductivity data (not for calibration)	$130.00
003821	pH 4 Buffer (box of 6 pints)	$96.75
003822	pH 7 Buffer (box of 6 pints)	$96.75
603824	pH Buffer Assorted Case (2 ea pints of 4, 7, 10)	$96.75
003823	pH 10 Buffer (box of 6 pints)	$96.75
003842	Ammonium Cal Solution, 10 mg/L (500mL)	$101.00
003841	Ammonium Cal Solution, 1 mg/L (500mL)	$101.00
003843	Ammonium Cal Solution, 100 mg/L (500mL)	$101.00
400397	TruLine Chloride High Standard	$74.98
400396	TruLine Chloride Low Standard	$74.98
061320	061320: 125 mL Zobell Solution	$41.75
061321	061321: 250 mL Zobell Solution	$62.50
061322	061322: 500 mL Zobell Solution	$93.75

Order Accessories

SKU	Description	Price
603078	3078 - Flow Cell Adaptor-Single Port	$129.75
605978	5978 - 4.9 oz weight	$36.25
603059	3059 - Flow Cell, Standard, 203 mL (2 port cable assembly)	$443.00
603075	3075 - Pro Series Soft Sided Carrying Case	$160.50
603062	3062 - Cable management kit (included with any cable 10, 20, or 30-meters long	$22.75
063019	690 - Weight, Probe/Cable, 24 oz, 3"	$190.00
603069	3069 - Belt clip (screws into back of meter)	$36.25
603077	3077 - Flow Cell Kit, 1 or 2 Port Sensor	$494.50
603070	3070 - Shoulder strap	$39.25
603056	3056 - Flow cell mounting spike	$40.00
606850	6850 - Quatro Cable Flow Cell	$494.50
063020	691 - Weight, Probe/Cable, 51 oz, 6"	$242.25
626444	6444 - Pro Series Lab Dock	$58.75
063507	4654 - Tripod (screws into back of meter)	$39.25
603074	3074 - Pro Series Hard Sided Carrying Case	$371.00
603162	6262 - Pro Series Soft Sided Small Carrying Case	$116.50

Add to Cart

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

The ProQuatro Multiparameter Handheld was designed to be used with the 4-port Quatro cable. Combine 4 sensors on a single cable for comprehensive multiparameter sampling to measure temperature/conductivity, DO, and any two ISEs (pH, ORP, ammonium, chloride, or nitrate).

Field Ready
- 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
- Backlit display
- Glow-in-the-dark keypad
- Cable management kit included with all cables from 4- to 30-meters
Advanced Technology
- 5,000 data set memory
- Interval or single-event logging
- 50 Data IDs
- Detailed GLP data
- On-The-Go USB port for simple data management
- 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
- Intuitive interface
- USB connection also powers the instrument
Versatile Handheld Options
- Multiple parameter options (dissolved oxygen, conductivity, specific conductance, salinity, resistivity, total dissolved solids, pH, ORP, ammonium, nitrate, chloride, and temperature)
- Multiple cable lengths available (1-, 4-, 10-, 20-, and 30-meter choices; up to 100-meters on DO-only cables)
- Use with any Professional Series cable and probe (Field or Lab)
- Multiple user-replaceable sensor options and a choice of DO sensor (polarographic or galvanic)
- Lab-grade ISE sensors and BOD probe available to make a true lab/field instrument (EPA Approved)
- 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
When purchasing the ProQuatro you will receive the instrument, manual, batteries, USB cable, and USB flash drive. Cables and probes are ordered separately.

ProQuatro is easily customized to be the ideal choice for low-cost water quality sampling.

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 Quatro Field Cable

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

Pro Series pH/ORP/ISE Field Cable

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

Pro Series pH/ORP/ISE and DO Field Cable

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

Pro Series Dual pH/ORP/ISE Field Cable

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

Pro Series pH/ORP/ISE and Conductivity Field Cable

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

Pro Series Dissolved Oxygen/Temperature Field Cable

YSI 20 Cable - DO and temperature cable assembly

Pro Series DO/Conductivity Field Cable

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

Pro Series Laboratory pH/ORP Sensor

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

Pro Series BOD Probe

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

Pro Series Polarographic Dissolved Oxygen Sensor

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

Pro Series Galvanic Dissolved Oxygen Sensor

YSI 2002 Galvanic Dissolved Oxygen sensor for the Pro Series

Pro Series 1001 pH Sensor

pH sensor for the YSI Professional Series

Pro1001A Amplified pH Sensor

1001A Amplified pH Sensor

Pro1001A Amplified pH Sensor Kit

1001A Amplified pH Sensor Kit*

Pro Series 1002 ORP Sensor

YSI 1002 ORP (redox) sensor for the Pro Series

Pro Series 1003 pH/ORP Sensor

pH/ORP Sensor

Pro1003A Amplified pH/ORP Combo Sensor

1003A Amplified pH/ORP Combo Sensor

Pro Series 1004 Ammonium ISE, NH4+ Sensor

YSI 1004 ammonium, NH4+ sensor for the Pro Series

Pro Series 1005 Chloride ISE Sensor

YSI 1005 Chloride ISE sensor for the Pro Series

Pro Series 1006 Nitrate ISE Sensor

YSI 1006 Nitrate ISE for the Pro Series

Pro Series Laboratory Grade pH Sensor

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

Pro Series Laboratory Grade ORP (Redox) Sensor

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

pH Buffer

pH Buffer

Conductivity Calibrator Solution

Conductivity Calibrator Solution

Zobell Solution, ORP Calibrator

Zobell Solution, ORP Calibrator

5580 Confidence Solution (case of 6 pints)

5580 Confidence Solution (case of 6 pints)

Nitrate Standard

Nitrate Standard

Ammonium Standard

Ammonium Calibration Solution

Cap Membrane Kit 1.00 Mil Teflon

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

Cap Membrane Kit 1.00 Mil Teflon

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

Pro Series Soft Sided Carrying Case

Carrying Case, Soft Sided

Pro Series Hard Sided Carrying Case

Carrying Case, Hard Sided

Pro Series Soft Sided Small Carrying Case

Carry Case, Soft Sided, Small

Flow Cell Quatro

Flow Cell for the Pro Series Quatro cable

Tripod Clamp

Tripod Clamp

Shoulder Strap

Shoulder Strap

Belt Clip

Belt Clip

Weight, Probe/Cable, 4.9 oz

Weight, Probe/Cable, 4.9 oz

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.