| ProDSS System Specifications (Instrument, Cables & Sensors) |
Dissolved Oxygen
(% saturation) |
Optical Luminescence - Lifetime Method |
0 to 500% |
0 to 200% (±1% of reading or 1% air saturation, whichever is greater)
200% to 500% (±8% of reading) |
0.1% or 1% air saturation (user selectable) |
1 or 2 points |
100 m |
Dissolved Oxygen (mg/L, ppm)
temp comp range -5 to 50°C |
Optical Luminescence - Lifetime Method |
0 to 50 mg/L |
0 to 20 mg/L
(±0.1 mg/L or 1% of reading, whichever is greater)
20 – 50 mg/L (±8% of reading) |
0.1 or 0.01 mg/L (user selectable) |
1 or 2 points (user selectable) |
100 m |
Temperature
(°C, °F, K) |
Thermistor; Combination Sensor with Conductivity |
-5 to 70°C (23 to 158°F) |
±0.2°C |
0.1°C or 0.1°F (user selectable) |
None |
100 m |
Turbidity
(FNU, NTU) |
Nephelometric - Optical, 90° Scatter |
0 to 4000 FNU |
0 to 999 (0.3 or ±2% of reading, whichever is greater)
1000 to 4000 (±5% of reading) |
0.1 FNU |
1, 2, or 3 points (user selectable) |
- |
Conductivity*
(µS, mS) |
Four Nickel Electrode Cell |
0 to 200 mS/cm |
0 to 100 mS/cm (±0.5% of reading or 0.001 mS/cm, whichever is greater)
100 to 200 mS/cm (±1% of reading) |
0.001, 0.01 or 0.1 µS/cm (range dependent) |
1 point |
100 m |
Specific Conductance
(µS, mS) |
Calculated from Conductivity and Temperature |
0 to 200 mS/cm |
±0.5% of reading or 0.001 mS/cm, whichever is greater |
0.001, 0.01, 0.1 mS/cm |
1 point |
- |
Resistivity
(ohm-cm, kohm-cm, Mohm-cm) |
Calculated from Conductivity and Temperature |
0 to 2 Mohms |
±0.1% Full Scale |
0.001, 0.01, 0.1 ohms |
- |
- |
Salinity
(ppt, PSU) |
Calculated from Conductivity and Temperature |
0 to 70 ppt |
±1.0% of reading or ±0.1 ppt, whichever is greater |
0.01 ppt |
1 point |
- |
Water Density
(Sigma, Sigma T) |
Sigma is Calculated from Salinity, Temperature, and Pressure
Sigma T is Calculated from Salinity and Temperature |
0.0 to 50.0 sigma, sigma T |
- |
0.1 sigma or sigma T |
- |
- |
pH
(mV, pH units) |
Glass Bulb Combination Electrode; Ag/AgCl Reference Gel |
0 to 14 units |
±0.2 units |
0.01 units |
1, 2, or 3 points (user selectable) |
100 m |
ORP
(mV) |
Platinum Button; Ag/AgCl Reference |
--1999 to +1999 mV |
±20 mV |
0.1 mV |
1 point |
100 m |
Ammonium**
(NH4-N mg/L, NH4-N mV)
ammonia with pH sensor |
Ion Selective Electrode |
0 to 200 mg/L NH4-N |
±10% of reading or 2 mg/L, whichever is greater |
0.01 mg/L |
1, 2, or 3 point
(user selectable) |
20 m |
Ammonia***
(NH3-N mg/L) |
Calculated from Ammonium, Temperature, Salinity and pH |
0 to 200 mg/L NH4-N |
- |
0.01 mg/L |
- |
- |
Nitrate**
(NO3-N mg/L, NO3-N mV) |
Ion Selective Electrode |
0 to 200 mg/L NO3-N |
±10% of reading or 2 mg/L, whichever is greater |
0.01 mg/L |
1, 2, or 3 point
(user selectable) |
20 m |
| Chloride** |
Ion Selective Electrode |
0 to 18000 mg/L Cl |
±15% of reading or 5 mg/L, whichever is greater |
0.01 mg/L |
1, 2, or 3 point
(user selectable) |
20 m |
Total Dissolved Solids (TDS)
(mg/L, kg/L, g/L) |
Calculated from Conductivity and Temperature |
0 to 100 g/L |
User-Selectable TDS Multiplier (0.30 to 1.00; 0.65 default) |
0.001, 0.01, 0.1g/L |
- |
- |
Total Suspended Solids (TSS)
(mg/L) |
Correlated from Turbidity Field Measurements and Lab TSS Measurements from Grab Samples |
0 to 30000 mg/L |
Calculated from Turbidity and User-Entered Correlation Points |
0.01, 0.1 mg/L |
- |
- |
Depth
(m, ft) |
Pressure Transducer |
0 to 100 m (0 to 328 ft) |
±0.004 m (±0.013 ft) for 1, 4 and 10-m cables
±0.04 m (±0.13 ft) for cables 20-m and longer |
0.001 m or 0.01 ft |
1 point |
- |
Barometer
(mmHg, inHg, mbar, psi, kPa, ATM) |
Piezoresistive |
375 to 825 mmHg |
±1.5 mmHg from 0 to 50°C |
0.1 mmHg |
1 point |
- |