Description:
The SNiP-DOT is a 'Sensor Node Integrated Package' for LoRa, LoRaWAN, FSK or CAT-M1 communication of real-time Dissolved O2 & Temperature measurements for continuous water quality monitoring.
The base SNiP-DOT integrates 1x S-NODE and 1x AWQ-DO Optical Dissolved Oxygen Sensor to a site's unique network, communication and power requirements. The S-NODE can support an added 3x Sensors. The OPTOD Optical Dissolved Oxygen Sensor uses optical measurement by luminescence to measure dissolved O2 in water and water temperature.
S-NODE: SDI-12 Node:
The S-NODE has been designed to support the broad suite of SDI-12 based environmental sensors. The S-NODE can support sensors with higher power requirements; a solar panel can charge either the internal lithium-ion battery or both the node and sensor can be powered by an external 12V system (e.g. battery or mains source). The S-Node's SDI-12 communications can be customised to allow for interfacing with any SDI-12 sensor.
AWQ-DO: Optical Dissolved Oxygen
Specifications
Measurement:
- Measurement Principle: Optical measurement by luminescence
- Measurement Ranges: 0 to 20 mg/L; 0 to 20 ppm; 0-200%
- Resolution: 0.01
- Accuracy: +/- 0.1 mg/L, +/- 0.1 ppm, +/- 1%
- Response Time: 90% of the value in less than 60 seconds
- Recommended Measurement Frequency: less than 5 seconds
- Water Movement: No movement necessary
- Temperature Compensation: NTC Thermistor
Sensor:
- Interface: Modbus RS-485 standard; SDI-12 optional
- Storage Temperature: -10 C to +60 C
- Sensor Power Supply: 5 to 12 volts
- Current Draw: Standby 25 uA
- Average RS485 (1 Hz): 4.4 mA
- Average SDI12 (1 Hz): 7.3 mA
- Current pulse: 100 mA
- Dimensions: Diameter: 25 mm; length: 146 mm
- Weight: Stainless steel version: 450g (sensor and 3m cable)
- Titanium version: 300g (sensor and 3m cable)
- Material: Stainless steel 316L or Titanium
- Maximum Pressure: 5 bar
- Connection: 9 armoured connectors, polyurethane jacket, bare wires or waterproof Fischer connector
- Protection: IP68
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