Water Quality Specifications

Standard Parameters

Dissolved Oxygen Range 0 – 500.0% / 0 – 50.00 mg/L
Resolution 0.1% / 0.01mg/L
Accuracy 0 – 200%: ± 1% of reading. 200% – 500%: ± 10%
Conductivity (EC) Range 0 – 200 mS/cm (0 – 200,000 µS/cm)
Resolution 3 Auto-range scales: 0 – 9999 µS/cm, 10.00 – 99.99 mS/cm, 100.0 – 200.0mS/cm
Accuracy ± 1% of reading
TDS* Range 0 – 100,000 mg/L (ppm)
Resolution 2 Auto-range scales: 0 – 9999mg/L, 10.00 – 100.00g/L
Accuracy ± 1% of reading
Resistivity* Range 5 Ωcm – 1 MΩcm
Resolution 2 Auto-range scales: 5 – 9999 Ωcm, 10.0 – 1000.0 KΩcm
Accuracy ± 1% of reading
Salinity* Range 0 – 70 PSU / 0 – 70.00 ppt (g/Kg)
Resolution 0.01 PSU / 0.01 ppt
Accuracy ± 1% of reading
Seawater Specific Gravity* Range 0 – 50 st
Resolution 0.1 st
Accuracy ± 1.0 st
pH Range 0 – 14 pH / ± 625mV
Resolution 0.01 pH / ± 0.1mV
Accuracy ± 0.1 pH / ± 5mV
ORP Range ± 2000mV
Resolution 0.1mV
Accuracy ± 5mV
Temperature Range -5°C – +70°C
Resolution 0.01° C/F
Accuracy ± 0.5° C

Optional Parameters

Depth ** Range 0-60m (AP-2000 & AP-5000), 0 – 100m (AP-7000)
Resolution 0.01m
Accuracy ±0.5% FS (AP-2000 & AP-5000), ±0.2%FS (AP-7000)
**Option on the AP-2000. Comes as standard on the AP-5000 & AP-7000

Ion Specific Electrodes***

Ammonium Range 0 – 9,000mg/L (ppm)
Resolution 2 Auto-range scales: 0.00 – 99.99 mg/L, 100.0 – 9,000 mg/L
Accuracy ± 10% of reading
Ammonia† Range 0 – 9,000mg/L (ppm)
Resolution 2 Auto-range scales: 0.00 – 99.99 mg/L, 100.0 – 9,000 mg/L
Accuracy ± 10% of reading
Chloride Range 0 – 20,000mg/L (ppm)
Resolution 2 Auto-range scales: 0.00 – 99.99 mg/L, 100.0 – 20,000 mg/L
Accuracy ± 10% of reading
Fluoride Range 0 – 1,000mg/L (ppm)
Resolution 2 Auto-range scales: 0.00 – 99.99 mg/L, 100.0 – 999.9 mg/L
Accuracy ± 10% of reading
Nitrate Range 0 – 30,000mg/L (ppm)
Resolution 2 Auto-range scales: 0.00 – 99.99 mg/L, 100.0 – 30,000 mg/L
Accuracy ± 10% of reading
Calcium Range 0 – 2,000mg/L (ppm)
Resolution 2 Auto-range scales: 0.00 – 99.99 mg/L, 100.0 – 2,000 mg/L
Accuracy ± 10% of reading
† Ammonium electrode required. Readings calculated from Ammonium, pH and temperature electrode values.

Optical Electrodes***

Turbidity Range 0 – 3000 NTU
Resolution 2 Auto-range scales: 0.0 99.9 NTU, 100 – 3000 NTU
Accuracy ± 5% of reading
Chlorophyll Range 0 – 500 µg/L (ppb)
Resolution 0.01 µg/L
Repeatability ± 5% of reading
Phycocyanin (Freshwater Blue-Green Algae) Range 0 – 300,000 cells/mL
Resolution 1 cell/mL
Repeatability ± 10% of reading
Phycoerythrin (Marine Blue-Green Algae) Range 0 – 200,000 cells/mL
Resolution 1 cell/mL
Repeatability ± 10% of reading
Rhodamine WT Dye Range 0 – 500 µg/L (ppb)
Resolution 0.01 µg/L
Accuracy ± 5% of reading
Fluorescein Dye Range 0 – 500 µg/L (ppb)
Resolution 0.01 µg/L
Accuracy ± 5% of reading
Refined Oil Range 0 – 10,000 µg/L (ppb)
Resolution 0.1 µg/L
Repeatability ± 10% of reading
CDOM/FDOM Range 0 – 2,000mg/L (ppm)
Resolution 2 Auto-range scales:
0.00 – 99.99 mg/L, 100.0 – 2,000mg/L
Repeatability ± 10% of reading

***Note

In addition to the standard parameters supplied with the base Aquaprobe, the AP-2000 has 1 ISE port and 1 optical port, the AP-5000 has 4 ports that can take any combination of ISE or optical sensors and the AP-7000 has 6 ports that can also take any combination of ISE or optical sensors.

The accuracy figures quoted above represent the equipment’s capability at the calibration points at 25°C. These figures do not take into account errors introduced by variations in the accuracy of calibration solutions and errors beyond the control of the manufacturer that may be introduced by environmental conditions in the field.