- 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*
Buy or Rent YSI Pro Plus Quatro Water Quality Meter
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, ammonium (ammonia), nitrate, chloride, and temperature.
- 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 |
| Item Description | Purchase Price |
| YSI Professional Plus (Meter Only) | $1,225.50 |
| Quatro 1M Cable Assembly (Requires Sensors) | $1,107.22 |
| Quatro 4M Cable Assembly (Requires Sensors) | $1,372.75 |
| Quatro 10M Cable Assembly (Requires Sensors) | $1,429.75 |
| Quatro 20M Cable Assembly (Requires Sensors) | $1,539.00 |
| Quatro 30M Cable Assembly (Requires Sensors) | $1,670.10 |
| pH Sensor | $170.05 |
| ORP Sensor | $199.50 |
| Polarographic DO Probe | $179.55 |
| Quatro Flow-thru Cell | $375.25 |
