YSI® ProPlus Quatro Multiparameter


Leading handheld water quality meter in the UK certified with MCERTS the YSI Professional Plus Quatro is a field rugged meter capable of measuring temperature, conductivity, salinity, pH and dissolved oxygen plus one of redox, ammonium, nitrate or chloride. Applications include surface and groundwater monitoring.

The YSI Professional Plus Quatro is a field rugged water quality instrument designed for spot monitoring, profiling and low flow purging applications.



Auto Stable: User-defined auto-stable function holds stable readings on display when criteria is met

Barometer: Built-in barometer

Buffer Recognition: Auto buffer recognition for US and NIST buffers

Certifications: RoHS, CE, WEEE, C-Tick, VCCI, FCC, IP-67, 1-meter drop test, Assembled in USA

Connectivity: USB 2.0; ProComm II communications saddle and USB cable included; user-upgradeable software

via USB and website

Connector: MS (military spec) waterproof with bayonet lock

Data Management:

Data Manager desktop software included; 100 user-defined folders and site names

Minimum PC requirements;

Data Memory: 5,000 data sets (data, date, time, user-defined info); 100 GLP files

Dimensions: 8.3 cm width x 21.6 cm length x 5.6 cm depth (3.25 in x 8.5 in x 2.21 in)

Display: Graphic display with detailed Help; backlit display AND keypad

DO Membrane Response Times (T95; 100%-0) and Flow Dependence:

1.25 mil PE = 8 seconds and 6 in/sec flow

2.0 mil PE = 17 seconds and 3 in/sec flow

1 mil Tefl on® = 18 seconds and 12 in/sec flow

DO Sensors: Polarographic or galvanic field sensors; self-stirring polarographic BOD sensor for the lab

Field Cables: Standard lengths of 1, 4, 10, 20, or 30 meters - up to 100 meters on DO only cables; 4- through

30-meter cables include a cable management kit

Flow Cell: Single, dual and multiparameter Quatro cable all flow cell compatible

GLP Compliance: Yes; detailed GLP information is stored and is available to view, download or print

Lab Cables: BOD sensor includes 2-meter cable; 1 or 4 meters on lab pH, ORP and pH/ORP cables

Languages: English, Spanish, German, French, Italian, Norwegian, Portuguese, Japanese, Chinese (Simplified &


Logging Modes: Single or Continuous

Operating Temperature: -10 to 60°C


2 alkaline C-cells provide 80 continuous hours at ambient temperature without backlight; ProComm

II saddle provides USB power or optional wall power, cigarette lighter, and universal cell phone

charger options

Storage Temperature: -20 to 70°C

User ID: Optional user ID for data security

Warranty: 3-year instrument; 2-year field cables

Waterproof: IP-67 (even with the battery cover off); floats

Weight with Batteries: 475 grams (1.05 lbs)

Toll Free: 1-888-233-3535

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