YSI ProDSS Multiparameter Digital Water Quality Meter
Category
The YSI ProDSS (Digital Sampling System) is a high-performance multiparameter water quality instrument designed for flexible, real-time assessment of aquatic environments.
The system combines a rugged handheld unit with digital smart sensors, enabling configurable measurement of multiple parameters depending on project requirements.
The ProDSS supports up to four interchangeable digital sensors per deployment, allowing targeted measurement configurations. Its smart sensor architecture includes onboard calibration storage and automatic recognition, improving efficiency and data integrity.
Key Highlights
- Configurable multi-parameter system (up to four simultaneous sensors)
- Digital smart sensors with stored calibration data
- Optical dissolved oxygen (ODO) for low-maintenance DO measurement
- Advanced turbidity measurement (up to ~4000 NTU)
- Large data storage capacity (>100,000 datasets)
- Optional GPS integration for geo-referenced data
- Rugged IP67-rated design
- Long battery life (~48 hours operation)
- Flexible cable lengths for deep-water profiling
Typical Applications
- Surface and groundwater monitoring
- ESIA hydrological assessments
- Wastewater monitoring
- Marine and coastal surveys
- Vertical profiling (lakes, rivers, reservoirs)
- Aquaculture monitoring
- Industrial discharge monitoring
Industries and Use Cases
- Environmental Consulting – baseline and compliance monitoring
- Oil & Gas – water quality and discharge monitoring
- Utilities – process optimisation
- Mining & Infrastructure – environmental impact monitoring
- Agriculture – nutrient monitoring
- Research Institutions – hydrological studies
Sensor Specifications
| Parameter / Sensor | Measurement Principle | Typical Range | Resolution | Accuracy / Notes |
|---|---|---|---|---|
| Dissolved Oxygen (DO) | Optical luminescence | 0 – 50 mg/L | 0.01 / 0.1 mg/L | ±1% (0–20 mg/L), ±8% (>20 mg/L) |
| DO (% Saturation) | Optical luminescence | 0 – 500% | 0.1% | ±1% typical (0–200%) |
| pH | Glass electrode | 0 – 14 pH | 0.01 pH | ±0.2 pH |
| ORP (Redox) | Platinum electrode | -1999 to +1999 mV | 0.1 mV | ±20 mV |
| Conductivity | 4-electrode cell | 0 – 100–200 mS/cm | 0.001–0.1 mS/cm | ±0.5–1% of reading |
| Specific Conductance | Calculated | 0 – 200 mS/cm | 0.001–0.1 mS/cm | Derived from conductivity |
| Resistivity | Calculated | 0 – 2 MΩ·cm | 0.001 units | ±0.1% FS |
| Salinity | Conductivity-derived | 0 – 70 ppt | 0.01 ppt | ±1% of reading |
| Temperature | Thermistor | -5 to 70°C | 0.1°C | ±0.2°C |
| Turbidity | Optical nephelometric (90°) | 0 – 4000 FNU/NTU | 0.1 NTU | ±2% (≤999), ±5% (>1000) |
| Total Algae (Chlorophyll/Phycocyanin) | Optical fluorescence | 0 – 100 µg/L (freshwater) / 280 µg/L (marine) | 0.01 µg/L | High correlation (r² ≈ 0.999) |
| Nitrate (NO₃⁻) | Ion-selective electrode (ISE) | 0 – 200 mg/L | 0.01 mg/L | ±10% |
| Ammonium (NH₄⁺) | Ion-selective electrode (ISE) | 0 – 200 mg/L | 0.01 mg/L | ±10% |
| Chloride (Cl⁻) | Ion-selective electrode (ISE) | 0 – 1000 mg/L | 0.01 mg/L | ±15% |
| Total Suspended Solids (TSS) | Optical (derived from turbidity) | Range dependent | — | Derived parameter |
| Water Density / Sigma | Calculated | 0 – 50 sigma | 0.1 | Derived from salinity & temp |
| Depth (optional) | Pressure sensor | Up to ~100 m | ~0.01–0.1 m | For profiling applications |
What water quality meters do you provide?
We provide:
- Horiba U-53 Multiparameter Water Quality Meter
- YSI ProDSS Multiparameter Digital Water Quality Meter
How many parameters can be measured?
- Horiba U-53: up to 11 parameters simultaneously
- YSI ProDSS: modular (depends on installed sensors; supports multiple simultaneous sensors)
What parameters can be measured?
Typical parameters include (depending on sensors):
- pH, ORP
- Dissolved Oxygen (DO)
- Conductivity, salinity, TDS
- Turbidity
- Temperature, depth
- Nutrients (e.g., nitrate/ammonium – ProDSS configuration dependent)
What environments can be monitored?
Suitable for:
- Surface water (rivers, lakes)
- Groundwater
- Wastewater/effluent monitoring
- Coastal/marine environments
Are these suitable for harsh field conditions?
Yes. Built for rugged field deployment with waterproof and shock-resistant characteristics (model dependent).
Do they support calibration and data export?
Yes.
- Calibration features include automatic/simplified routines (model dependent)
- Data storage and export via USB/software tools
Which should I choose: Horiba U-53 or YSI ProDSS?
- Horiba U-53: strong for routine multi-parameter field monitoring
- YSI ProDSS: best for flexible, modular, research-grade applications and large datasets