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Enabling better global research outcomes in soil, plant & environmental monitoring.

SNiP-NTU for Nephelometric Turbidity

The SNiP-NTU is a 'Sensor Node Integrated Package' for LoRaWAN or CAT-M1 communication of real-time turbidity and temperature measurements for continuous water quality monitoring.

Base SNiP-NTU

The base SNiP-NTU integrates 1x S-NODE and 1x AWQ- NTU Sensor to a site’s unique network, communication and power requirements. The S-NODE can support an added 3x Sensors. The NTU Sensor is an optical sensor for the measurement of Nephelometric Turbidity.

  • IR optical sensor with optical fibre
  • Range: 0 to 4000 NTU or 0-4500 mg/L
  • Robust and waterproof (IP68)
  • Ultra low-power consumption
  • Digital output: Modbus RS-485 or SDI-12

APPLICATIONS:

  • Urban wastewater treatment (inlet/ outlet controls)
  • Sanitation network
  • Industrial effluent treatment
  • Surface water monitoring
  • Drinking water

 

See Further Specifications on the S-NODE
See Further Specifications on the AWQ-NTU Sensor

OPTICAL TECHNOLOGY

  • The measurement principle is based on IR nephelometry/850 nm. The sensor can be calibrated with a formazine standard solution.
  • The NTU sensor uses low-cost optical technology, requiring very little maintenance and no consumables.

DIGITAL COMMUNICATION

The sensor can be connected to any types of transmitters, display units, controllers, or data loggers with Modbus RS-485 or SDI-12 inputs. The optical sensor saves its calibration data for better measurement management.

INTEGRATED TRANSMITTER

All data concerning calibration, history, users and measurements are processed within the NTU sensor and transmitted via RS-485 or SDI-12.

PHYSICAL CHARACTERISTICS

Compact, robust and light, the PVC sensor allows for handheld or fixed unit application.

S-NODE

The S-NODE (for Environmental Monitoring) 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).

A decoder suitable for TTN will be provided based upon sensor configuration.

  • LoRaWAN™ low-power long-range connectivity
  • Supports the full range of SDI-12 commands, and sensors requiring constant excitation.
  • Optional CAT-M1
  • Solar rechargeable Lithium-ion or external 12V power options
  • Optional Multi-constellation GNSS
  • AS923, AU915 and US915 available, with other region plans available upon request.
  • Standard IP65 enclosure, optional IP67

 

AWQ-NTU Sensor

Measurement:
Measurement Principle: Diffusion IR at 90°
Measure range: 0 to 4000 NTU in 5 ranges:
• 0 – 50 NTU
• 0 – 200 NTU
• 0 – 1000 NTU
• 0 – 4000 NTU
• AUTOMATIC
OR 0 to 4500 mg/L
Calibration: Range 0-500 mg/L according to NF EN 872
Range >500 mg/L according to NF T 90 105 2
Resolution: 0.01 to 1 NTU – mg/L
Accuracy: < ±5%
Temperature Measurement: NTC Thermistor
Interface: Modbus RS-485 (standard); SDI-12 (optional)
Measurement Frequency: 1Hz
Power Requirement: 5 to 12 volts DC
Standby Current Draw: 40 μA
Average RS485 Draw (1 measurement/second): 820 μA
Average SDI12 Draw (1 measurement/second): 4.2 mA
Current Pulse: 500 mA
Sensor:
Operating Temperature: 0°C to +50°C
Storage Temperature: -10°C to +60°C
Dimensions: Diameter: 27 mm; length: 170 mm
Weight: 300g (sensor and 3 meter cable)
Construction: PVC, DELRIN, Quartz, PMMA, Polyamide
Maximum Pressure: 5 bar
Connection: 9 armoured connectors, polyurethane jacket, bare-wires or waterproof Fischer connector

NTU Wiring

Dimensions (mm)NTU Dimensions