The AquaPlus Gallery
A quick introduction to the AquaPlus
The luminescence based method for measuring dissolved oxygen has the following advantages:
The AquaPlus probe is available as a complete package including the probe with built in 3m cable and our GPS DO Meter, all packed in a hard carry case with foam cut-outs to keep your equipment safe.
The optical sensor works on the principle of Dynamic Luminescence Quenching. A gas-permeable material known as a luminophore is excited with short bursts of blue light, which causes molecules in the luminophore to emit red photons.
By measuring the delay of the returned red photons with respect to the blue excitation, the level of dissolved oxygen present can be determined.
The optical method has various advantages over the historical galvanic method for measuring dissolved oxygen.
The bright red and blue LED’s of the optical DO sensor
The most important being that as no oxygen is consumed across a membrane, the sensor does not require a flow of liquid passing over it to achieve a stable reading. Other advantages include in frequent calibrations (every 3-6 months), and replaceable caps that last over 2 years.
Clever Tech
The AquaPlus sensor houses the optical sensor module on the tip, a 4 ring stainless steel conductivity sensor and an embedded temperature sensor.
The inclusion of the EC sensor allows the unit to calculate the salinity and automatically compensate the % saturation reading for salinity effects.
DO Cap and the 4 ring EC sensor
Use the GPS DO Meter
Pin Point your data in Google Earth
| 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 – +50°C (23°F – 122°F) |
| Resolution | 0.01° C/F | |
| Accuracy | ± 0.5° C |
| 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 | ||
| 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 | |
| Flouride | 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. | ||
| Turbidity | Range | 0 – 3000 NTU |
| Resolution | 2 Auto-range scales: 0.0 99.9 NTU, 100 – 3000 NTU | |
| Repeatability | ± 2% of reading | |
| Chlorophyll | Range | 0 – 500 µg/L (ppb) |
| Resolution | 0.01 µg/L | |
| Repeatability | ± 2% of reading | |
| Phycocyanin (Freshwater Blue-Green Algae) | Range | 0 – 300,000 cells/mL |
| Resolution | 1 cell/mL | |
| Repeatability | ± 2% of reading | |
| Phycoerythrin (Marine Blue-Green Algae) | Range | 0 – 200,000 cells/mL |
| Resolution | 1 cell/mL | |
| Repeatability | ± 2% of reading | |
| Rhodamine WT Dye | Range | 0 – 500 µg/L (ppb) |
| Resolution | 0.01 µg/L | |
| Repeatability | ± 5% of reading | |
| Fluorescein Dye | Range | 0 – 500 µg/L (ppb) |
| Resolution | 0.01 µg/L | |
| Repeatability | ± 5% of reading | |
| Refined Oil | Range | 0 – 10,000 µg/L (ppb) |
| Resolution | 0.1 µg/L | |
| Repeatability | ± 2% 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 or 2ppm (whichever is greater) |
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