The SNiP-SPW2 is a 'Sensor Node Integrated Package' for LoRaWAN or CAT-M1 communication of real-time plant diameter measurements in relation to real-time weather parameters and Volumetric Soil Water VSW% content (based on capacitance technology) for continuous plant monitoring.
The base SNiP-SPW2 integrates 1x S-NODE and three sensors to a site’s unique network, communication and power requirements: 1x DBS60 Band Dendrometer, 1x Atmos-14, 1x EP100GL-08 EnviroPro (80cm Length).
The DBS60 Band Dendrometer is an SDI-12 Band Dendrometer designed to measure short- and long-term changes in stem circumference.
The Atmos-14 monitors microclimate and evapotranspiration via the measurement of Relative Humidity, Barometric Pressure, Air Temperature, and Vapor Pressure with or without a passive radiation shield.
TheEnviroPro EP100GL-08 (80cm) or EP4 (40cm) with internal sensing points at 10cm intervals, provides measurements of Volumetric Soil Water % (VSW), and soil temperature.
The modular nature of ICT International SNiPs allows for SNiP-SPW2 to be extended with alternative or further parameters – without requiring unique loggers to match each distinct sensor, substantially reducing the cost of getting a fuller picture on the application. The S-NODE can support 1x additional SDI-12 sensor to the base SNiP package.
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.
The DBS60 is an SDI-12 Band Dendrometer designed to measure short- and long-term changes in stem circumference.
The DBS60 SDI-12 Band Dendrometer is similar to the DBL60, but has a cable for the connection to a SDI-12 Data Logger.
Change in Tree Circumference (mm)
|Increment sensors type||
|Range||64 mm of circumference|
2% of full scale
15 to 20 N in the whole range, stem diameter independent
Tape temperature coefficient:
|17.3 x 10-6 per °C|
-30 to 60°C
|– Humidity||0 to 100%|
|Size||100 x 70 x 100 mm|
ca 260 g
Minimal stem diameter
|Tightening strength||15 to 20 N|
(Note: The Decagon VP-4 has been replaced by the Meter ATMOS 14).
|RANGE||0 to 100% RH|
|ACCURACY||Sensor measurement accuracy is variable across a range of temperatures.
Refer to the chart in Figure 1 to determine the accuracy specification for the ATMOS 14 sensor.
|< 40 s (response time in 1 m/s air stream)|
|HYSTERESIS||< 1% RH typical|
|LONG TERM DRIFT||< 0.5% RH/year typical|
|RANGE||-40°C to 80°C|
|ACCURACY||Sensor measurement accuracy is variable across a range of temperatures. Refer to the chart in Figure 2 to determine the accuracy specification for the VP-4 sensor|
|< 400 s (response time in 1 m/s air stream)|
|LONG TERM DRIFT||< 0.04°C / year typical|
|RANGE||0 to 47 kPa|
|ACCURACY||Sensor measurement accuracy is variable across a range of temperatures and RH. Refer to the chart in Figure 3 to determine the accuracy specification for the VP-4 sensor.|
|RANGE||49 to 109 kPa|
|DIMENSIONS||1.96 cm (dia) x 5.4 cm (h)|
|POWER REQUIREMENTS||3.6 to 15 VDC, 0.03 mA quiescent, 4 mA during 300 ms measurement|
|RESPONSE (MEASUREMENT) TIME||300 ms|
|OUTPUT||Decagon Digital or SDI-12|
|OPERATING TEMPERATURE||-40°C to 80°C|
|CONNECTOR TYPES||3.5 mm (stereo) plug or stripped and tinned lead wires (pigtail)|
|CABLE LENGTH||5 m standard; custom cable length available upon request|
|DATA LOGGER COMPATIBILITY
|Meter/Decagon: Em50 Series (Firmware 2.19+)
ICT SDI-12 logger, AML, AWS, Universal Telemetry Hub
Campbell Scientific: Any logger with serial I/O
|HANDHELD READER COMPATIBILITY||ProCheck (rev 1.57+)|
|SOFTWARE COMPATIBILITY||ECH2O Utility (rev 1.74)
DataTrac (rev 3.11+)
EnviroPro® sub-surface Soil Probes have been carefully engineered to be accurate, long-life, maintenance-free instruments suitable for all soil types. Their design employs clever techniques to correctly compensate moisture measurements for variations in salinity, as well as compensating moisture and salinity measurements for temperature variations, something not observed in any competitor probes.
|Salinity resolution:||0.001 dS/m|
|Moisture accuracy:||+/- 2% @ 0% VWC to 50% VWC|
|Useable salinity range:||0 to 6 dS/m*
*Upper limit of non-contact capacitance sensors
|Salinity accuracy:||+/- 5% @ 0 to 4 dS/m
+/- 5% @ 10% to 30% VWC
|Temperature accuracy:||+/- 1°C @ 25°C|
|Units of Measure|
|Moisture:||Volumetric Water Content %|
|Temperature:||°C or °F|
|Operating and Electrical Specification|
|Interface:||SDI-12 version 1.3|
|Wiring:||Red: +6 to +15VDC
Yellow: Not connected (reserved for future use)
|Power Supply:||+6 to +15 VDC
Reverse voltage and lightning protected
|Operating temperature:||-20 to +60°C|
|Sleep:||0.1mA per sensor (0.4mA for 4 sensor probe)|
|Active current:||1mA per sensor (4mA for 4 sensor probe)|
|Measurement current:||64mA @150ms per sensor|
Available in 40, 80, 120, and 160cm lengths.