LoRaWAN Soil Monitoring Station (ADR)
The MFR-Node can be configured with the ICT MP406 or MP306 for remote LoRaWAN soil moisture measurement and monitoring.
Standing Wave, or Amplitude Domain Reflectometry, uses an oscillator to generate an electromagnetic wave at a consistent frequency, which is transmitted through a central signal rod, using outer rods as an electrical shield. The electromagnetic wave is partially reflected by areas of the medium with different dielectric constants (water content), producing a measurable voltage standing wave. ADR measures volumetric soil water (VSW%) independently of all other soil variables, including density, texture, temperature and electrical conductivity. ADR does not require in-situ calibration to accurately measure VSW%.
- LoRaWAN™ low-power long-range connectivity
- 8GB SD Card for data storage
- Supporting SDI-12, 2 x 32-bit dry-contact counting digital inputs.
- 24-bit ADC for 2x differential / 4x single ended sensor.
- Optional CAT-M1
- Solar rechargeable Lithium-ion, Single use LiSOCl2, or external 12V power options
- Optional Multi-constellation GNSS
Measurement |
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| Measurement Range | 0-100 VSW% |
| Accuracy | 1% VSW% after calibration to a specific soil type ± 5 VSW% using the supplied soil calibration |
| Resolution | 0.01% VSW% |
| Response Time | Less than 0.5 seconds |
| Stabilisation Time | 3 seconds approximately from power-up |
Interface |
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| Input Requirements | 9-18 V DC unregulated |
| Power Consumption | 24 mA typical, 30mA max |
| Output signal | 0-1160mV for 0-100 VSW% |
Mechanical |
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| Total Length | 210 mm |
| Needle Length | 60 mm |
| Needle Seperation | 12 mm |
| Needles | Stainless Steel (Grade 316) – does not corrode in saline solutions |
| Exterior | ABS Plastic |
| Cable | 4.5m Standard |
Other |
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| Environment | Designed for permanent or temporary burial |
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