WQMS Proteus For (Onlimo)

Biochemical Oxygen Demand (BOD) (CAL-BOD)

• Parameter: BOD mg/l

• Range: 0 - 2000 mg/l

• Resolution: 0.01 mg/l

• Accuracy: ±5 % of reading*

• Comments: Local site calibration can improve accuracy.

Chemical Oxygen Demand (COD) (CAL-COD)

• Parameter: BOD mg/l

• Range: 0 - 2000 mg/l

• Resolution: 0.01 mg/l

• Accuracy: ±5 % of reading*

• Comments: Local site calibration can improve accuracy.

Temperature (P-S-TEMP)

• Parameter: Water Temperature

• Range: -5 to 50°C

• Resolution: 0.01

• Accuracy: ±0.1

• Comments: Never needs calibration.

Dissolved Oxygen (DO) (P-S-DO)

• Concentration

• Range: 0 to 20 mg/l; 20 to 30 mg/l; 30 to 50 mg/l

• Resolution: 0.01; 0.01; 0.1

• Accuracy: ±0.1; ±0.15; ±5 % of reading *Comments: Compensated for temperature and salinity;

EPA approved “lifetime” luminescence method; typical sensor cap life > 4 years.

pH (P-S-PH)

• Parameter: PH

• Range: 0 to 14 units 0.01

• Resolution: ±0.1

• Accuracy: within 10°C of calibration, 0.2°C otherwise

• Comments: Refillable reference electrode; corrected for temperature; typical sensor life > 4 years.

Nitrat (P-S-ISE-NO3)

• Parameter: Nitrat

• Range: 0 to 100 mg/l as nitrogen

• Resolution: 0.1

• Accuracy: ±5 % or 2 mg/l

• Comments: Corrected for ionic strength (via conductivity readings);

the accuracy specification relies on non-trivial maintenance practice and frequent calibration near the temperature of measurement;

ammonium and nitrate require tip replacement every 3 - 6 months. Please contact us for applications >10 m.

Total Suspended Solid (TSS) (CAL-TSS)

• Parameter: TSS

• Range: 0 to 500 mg/l

• Resolution: 4 digits with maximum of two decimals

• Accuracy: ±2 % of reading or 0.2

• Comments: Calculated using the correlation between turbidity and a sediment standard or sample. Local calibration can be applied.

Total Dissolve Solid (TDS) (P-S-EC)

• Parameter: TDS

• Range: 0 to 65 g/l

• Resolution: 0.1

• Accuracy: ±5 % of reading

• Comments: Calculated from specific conductance

Turbidity (P-S-TU)

• Parameter Turbidity

• Range: 0-40 NTU; 40-400 NTU; 400-5000 NTU

• Resolution: 4 digits with maximum of two decimals

• Accuracy: ±2 % of reading or 0.2; ±2 % of reading or 0.2; ±2 % of range

• Comments: Compensated for temperature; filtered for non-turbidity spikes; includes wiper to clean the optics

Amoniak - NH4 (P-S-ISE-NH4)

• Range: 0 to 100 mg/l as nitrogen

• Resolution: 0.1

• Accuracy: ±5 % or 2 mg/l

• Comments: Corrected for ionic strength (via conductivity readings);

the accuracy specification relies on non-trivial maintenance practice and frequent calibration near the temperature of measurement;

ammonium and nitrate require tip replacement every 3 - 6 months. Please contact us for applications >10 m.

Depth (Tinggi Muka Air) (P-S-DEP)

• Parameter: Depth

• Range: 0 to 25 m; 0 to 200 m

• Resolution: 0.01

• Accuracy: ±0.05 m; ±0.4 m

• Comments: Conductivity sensor fitted for Salinity