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Overview

The YSI ProQuatro is a rugged handheld multiparameter meter for field water quality. One 4-port Quatro cable carries a dissolved oxygen sensor, a conductivity/temperature sensor and any two ion-selective sensors (pH, ORP, ammonium, chloride or nitrate). It is EPA approved for drinking water and wastewater compliance reporting.

  • Measures DO, conductivity, specific conductance, salinity, resistivity, TDS, pH, ORP, ammonium, nitrate, chloride and temperature
  • 4-port Quatro cable combines four analog sensors on one cable; 1, 4, 10, 20 and 30 m field cables
  • Galvanic or polarographic DO sensors; self-stirring BOD probe option for the laboratory
  • IP-67 waterproof overmolded case (even without the battery cover), floats, drop-tested at 1 m
  • 5,000 data set memory, 50 Data IDs, detailed GLP data and 6-point calibration with auto-buffer recognition
  • USB port for data export and firmware upgrades; USB also powers the instrument
  • Backlit graphic display and glow-in-the-dark keypad; 9 interface languages including French
  • 3-year instrument warranty and 2-year cable warranty

Instrument only: choose a Quatro cable, sensors and accessories below. Request a quote for pricing and availability.

Specifications

Handheld
YSI-606950 ProQuatro handheld; cables, sensors and accessories ordered separately
Supplied With
Handheld / alkaline batteries / hand strap / USB cable / USB flash drive with manual and quick start guide
Temperature
Field cables -5 to 70 °C / resolution 0.1 °C / accuracy ± 0.3 °C
Dissolved Oxygen
0 to 50 mg/L or 0 to 500% air saturation / accuracy ± 2% of reading or 0.2 mg/L (0 to 20 mg/L) / ± 6% (20 to 50 mg/L)
pH
0 to 14 pH units / resolution 0.01 / accuracy ± 0.1
ORP
-1999 to 1999 mV / resolution 0.1 mV / accuracy ± 20 mV
Conductivity
0 to 200 mS/cm auto-ranging / accuracy ± 0.5% of reading or 0.001 mS/cm (1 and 4 m cables)
Salinity
0 to 70 ppt / accuracy ± 1.0% of reading or 0.1 ppt
Ammonium / Nitrate
0 to 200 mg/L-N / accuracy ± 10% of reading or 2 mg/L-N
Chloride
0 to 1000 mg/L-Cl / accuracy ± 15% of reading or 5 mg/L-Cl
Barometer
375 to 825 mmHg / accuracy ± 1.5 mmHg (0 to 50 °C)
Power
2 alkaline C-cells / about 80 hours without backlight / USB or optional wall power
Operating / Storage Temperature
-10 to 60 °C / -20 to 70 °C
Size
8.3 x 21.6 x 5.7 cm (3.25 x 8.5 x 2.25 in)
Weight
475 g (1.05 lb) with batteries
Certifications
RoHS / CE / FCC / WEEE / IP-67 / 1 m drop test; assembled in the USA
Warranty
3 years instrument / 2 years cable

Documents

In-house service

Calibration and repair

Send it to our Montreal service team. We evaluate the instrument and send a detailed quote before any work starts.

Start a service request

Parts & accessories

Compare with similar models

YSI · Water Quality Meter
SpecThis modelYSI ProQuatro Multiparameter Water Quality MeterPrice on quote YSI Pro20 Dissolved Oxygen and Temperature MeterPrice on quote YSI ProDSS Multiparameter Digital Water Quality MeterPrice on quote YSI Pro20i Dissolved Oxygen and Temperature MeterPrice on quote
DO Range0 to 50 mg/L0 to 50 mg/L—0 to 50 mg/L
Memory5000 data sets50 data sets100000+ data sets—
Battery Life80 hours400 hours48 hours400 hours

Questions, answered

How fast will I get a price?

Send the quote request and a specialist replies within 4 business hours, Monday to Friday, 8:00 to 4:30 ET.

Can we pay on account or by purchase order?

Yes. With established credit, terms are Net 30 days, and you can send your purchase order with the quote request. We also accept Visa, Mastercard and American Express.

How is shipping charged?

On quotes and account orders, freight is F.O.B. Montréal: the carrier charge is worked out at shipment from the packed weight and dimensions, and added to your invoice. In-stock items can also be picked up the same day in Montréal (8605 rue du Champ-d'Eau).

Can I return it?

Yes, within 30 days of purchase, with a return authorization number from customer service first. A 25% restocking fee applies, unless it is a defect covered by the warranty. Special orders, hazardous materials, flammable liquids and gases can't be returned. Return policy

Can ERE calibrate or repair it?

Yes. Our Montréal service shop calibrates and repairs it in-house. Request service

What warranty does it carry?

The manufacturer's warranty applies. The exact terms are in the warranty document. Read the warranty

Since 1994Supplying labs and field crews
30,000+Customers across North America
AuthorizedBrand distributor
4 hrTypical quote turnaround