Sale!
Rent YSI Professional Plus

Buy YSI Pro Plus Quatro Water Quality Meter

$1,230.00 $1,168.50

The YSI Professional Plus handheld multiparameter meter provides extreme flexibility for the measurement of a variety of combinations for dissolved oxygen, conductivity, specific conductance, salinity, resistivity, total dissolved solids (TDS), pH, ORP, and temperature.

The YSI Professional Plus handheld multiparameter meter requires additional accessories such as cable and sensors.  See pricing below.  Please contact us, an Eco-Rental Solutions representative can help determine the proper configuration for your purchase.  

  • Easy-to-install cable weights; can be daisy-chained for additional weight*
  • Rubber, over-molded IP-67 waterproof case (even without the battery cover)*
  • 3-year instrument warranty
  • 2-year cable warranty*
  • Rugged cables, sensors, and military-spec connectors*
  • Drop-tested 1 meter at all angles*
  • Scratch-resistant lens; viewable with polarized glasses
  • Instrument floats
  • Weighted, user-replaceable multi-sensor design
  • 5,000 data set memory
  • Detailed on-screen Help function*
  • Free, Data Manager desktop software and ProComm II saddle*
  • Interval or single-event logging
  • 100 folder & site list data structure*
  • Password protection
  • Detailed GLP data
  • 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 AND keypad*
  • Surface water
  • Wastewater
  • Aquaculture
  • Groundwater

Professional Plus System Specifications (Cables & Sensors)

  Sensor Type Range Accuracy Resolution Units Calibration
Dissolved Oxygen (%)
(temp comp range -5 to 45°C)
Polarographic or Galvanic 0 to 500% 0 to 200%
(± 2% of reading or 2% air saturation, whichever is greater)
200% – 500% (± 6% of reading)
1% or 0.1% air saturation
(user selectable)
% 1 or 2-points with zero
Dissolved Oxygen (mg/L)
(temp comp range -5 to 45°C)
Polarographic or Galvanic 0 to 50 mg/L 0 to 20 mg/L
(± 2% of reading or 0.2 mg/L, whichever is greater)
20 – 50 mg/L (± 6% of reading)
0.1 or 0.01 mg/L (user selectable); 0.1% air saturation mg/L, ppm 1 or 2-points with zero
Temperature
(Field rugged cables)
  -5 to 70°C ±0.2°C (±0.3°C cables over 45-meters) 0.1°C °C, °F, K  
Temperature
(Lab-grade)*
  0 to 40°C ±0.35°C 0.1°C °C, °F, K  
Conductivity** Four electrode cell 0 to 200 mS/cm
(auto range)
±0.5% of reading or 0.001 mS/cm, whichever is greater (1-, 4-m cable) ±1% of reading or 0.001 mS/cm, whichever is greater (20-m cable) 0 to 0.500 mS/cm = 0.001
0.501 to 50.00 mS/cm = 0.01
50.01 to 200 mS/cm = 0.1
(range dependent)
µS, mS 1 point
Salinity Calculated from conductivity and temperature 0 to 70 ppt ±1.0% of reading or 0.1 ppt, whichever is greater 0.01 ppt ppt, PSU 1 point
pH Glass Combination Electrode 0 to 14 units ±0.2 units 0.01 units mV, pH units 1, 2, 3, 4, 5, or 6 point (user selectable); US, NIST or Custom Buffers
ORP Platinum button –1999 to +1999 mV ±20 mV in redox standards 0.1 mV mV 1 point
Total Dissolved Solids (TDS) Calculated from conductivity and temperature 0 to 100 g/L TDS constant range 0.30 to 1.00 (0.64 default)   0.001, 0.01, 0.1g/L kg/L, g/L  
Barometer Piezoresistive 375 to 825 mmHg ±1.5 mmHg from 0 to 50°C 0.1 mmHg mmHg, inHg, mbar, psi, kPa, ATM 1 point

Product Manual (PDF)
Quickstart Guide (PDF)
Specifications (PDF)

Item Description Purchase Price
YSI Professional Plus (Meter Only) $1,050.00
Quatro 1M Cable Assembly (Requires Sensors) $1,165.50
Quatro 4M Cable Assembly (Requires Sensors) $1,192.50
Quatro 10M Cable Assembly (Requires Sensors) $1,251.00
Quatro 20M Cable Assembly (Requires Sensors) $1,345.50
Quatro 30M Cable Assembly (Requires Sensors) $1,462.50
pH Sensor $162.00
ORP Sensor $184.50
Polarographic DO Probe $162.00
Quatro Flow-thru Cell $342.00