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Description
The AP-2000 sensor comes with the Aquaprobe AP-2000 with Optical DO, EC (& Calculated parameters), pH, ORP and Temperature sensors. The AP-2000 has two empty Aux sockets pre-fitted with removable blanking plugs, that can be fitted with an ISE probe in either Aux socket and an Optical sensor in Aux 1. The sensors are designed to be fully submerged in water and are rated to IP68, they are rated for continual immersion to a depth of 30 meters, and short term immersion (less than 12 hours) to 100 meters.
Advanced Optical DO sensor
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
Specifications
| Parameters | Range | Resolution | Accuracy |
|---|---|---|---|
| Standard Parameters | |||
| Dissolved Oxygen | 0-500.0%/0-50.00mg/L | 0.1%/0.01mg/L | ±200%: ±1% of reading, 200% – 500%: ±10% |
| Depth Sensor | ±0-60.00m | 1cm | ±0.5%FS |
| Conductivity (EC) | 0-200mS/cm (0-200,000µS/cm) | 3 Auto-range scales: 0-9999µS/cm, 10.00-99.99mS/cm, 100.0-200.0mS/cm |
±1% of reading |
| TDS | 0-100,000mg/L (ppm) | 2 Auto-range scales: 0-9999mg/L, 10.00-100.00g/L | ±1% of reading |
| Resistivity | 5 Ω·cm-1 MΩ·cm | 2 Auto-range scales: 5-9999 Ω·cm, 10.0-1000.0 kΩ·cm | ±1% of reading |
| Salinity | 0-70 PSU/0-70.00 ppt (g/Kg) | 0.01 PSU/0.01 ppt | ±1% of reading |
| Seawater Specific Gravity | 0-50 σt | 0.1 σt | ±1.0 σt |
| pH | 0-14 pH/±625mV | 0.01 pH/±0.1mV | ±0.1 pH/±5mV |
| ORP | ±2000mV | 0.1mV | ±5mV |
| Temperature (non freezing) | -5 to +50°C | 0.01°C | ±0.1°C |
| Ion Selective Electrodes (ISE) | |||
| Ammonium | 0-9,000mg/L (ppm) | 2 Auto-range scales: 0-99.99mg/L, 100-8,999.9g/L | ±10% of reading or 2ppm (whichever is greater |
| Ammonia | 0-9,000mg/L (ppm) | 2 Auto-range scales: 0-99.99mg/L, 100-8,999.9g/L | ±10% of reading or 2ppm (whichever is greater |
| Chloride | 0-20,000mg/L (ppm) | 2 Auto-range scales: 0-99.99mg/L, 100-19,999.9g/L | ±10% of reading or 2ppm (whichever is greater |
| Fluoride | 0-1,000mg/L (ppm) | 2 Auto-range scales: 0-99.99mg/L, 100-999.9g/L | ±10% of reading or 2ppm (whichever is greater |
| Nitrate | 0-30,000mg/L (ppm) | 2 Auto-range scales: 0-99.99mg/L, 100-29,999.9g/L | ±10% of reading or 2ppm (whichever is greater |
| Calcium | 0-2,000mg/L (ppm) | 2 Auto-range scales: 0-99.99mg/L, 100-1,999.9g/L | ±10% of reading or 2ppm (whichever is greater |
| Optical Probes | |||
| Turbidity | 0-4,000 NTU | 2 Auto-range scales: 0-99.9 NTU, 100-4000 NTU | ±10% of auto-ranged scale |
| Chlorophyll | 0-500.0µg/L (ppb) | 2 Auto-range scales: 0-99.99mg/L, 100-500.0g/L | ±5% of reading |
| Phycocyanin (Freshwater) | 0-300,000 cells/mL | 1 cell/mL | ±10% of reading |
| Phycocyanin (Marine BGA) | 0-200,000 cells/mL | 1 cell/mL | ±10% of reading |
| Rhodamine WT Dye | 0-500µg/L (ppb) | 2 Auto-range scales: 0-99.99µg/L, 100.0-500.0µg/L | ±5% of reading |
| Fluoescein Dye | 0-500µg/L (ppb) | 2 Auto-range scales: 0-99.99µg/L, 100.0-500.0µg/L | ±5% of reading |
| Refined Oil | 0-10,000mg/L (ppb) (Napthalene) | 0.1µg/L | ±10% of reading |
| CDOM/FDOM | 0-20,000µg/L (ppb) (Quinine Sulphate) | 2 Auto-range scales: 0-9,999.9µg/L, 10,000.0-20,000µg/L | ±10% of reading |