Integrated Soil Moisture Monitoring Station - IC-SNiP-SMT-SL
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The SNiP-SMT is a 'Sensor Node Integrated Package' for LoRa, LoRaWAN, FSK or CAT-M1 communication of real-time soil moisture measurement for continuous soil monitoring. The base SNiP-SMT integrates 1x S-NODE and 1x SMT-100 soil moisture sensor to a site's unique network, communication and power requirements. The S-NODE can support an added 3x SMT-100 devices. 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. A decoder suitable for TTN will be provided based upon sensor configuration. SMT-100 Sensors The SMT-100 combines the advantages of the low-cost FDR sensor system with the accuracy of a TDR system. Like a TDR, it measures the travel time of a signal to determine the relative permittivity ?r of the soil. And like a FDR, it converts ?r into an easy to measure frequency. The SMT-100 utilizes a ring oscillator to transform the signal's travel time into a frequency. The resulting frequency (>100 MHz) is high enough to operate well even in clayey soils. Compact, functional and robust: the PCB board based design allows for an economic design, and the blade shape facilitates installation. The casing and cable are water sealed. The SMT-100 is connected to a logger or handheld for data management. Different communication protocols are available (RS485 or SDI-12), as well as analogue output. It is bus capable and thus, multiple sensors can be connected to one logger. The SMT-100 determines the volumetric water content and the soil temperature. It has a broad measurement range, it is maintenance free
and frost resistant. With a short response time and low disturbance by salinity it is designed for a long-term observation. Additionally,
it is possible to retrieve the relative Permittivity.
SpecificationsMoisture: - Measurement range: 0-60 % vol (0 100 % vol with limited accuracy)
Temperature: - Range: -40 to +80 C (analog -40 to +60 C), extended temperature range on request
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