The SNiP-SPW3 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-SPW3 integrates 1x MFR-NODE and three sensors to a site’s unique network, communication and power requirements: 1x DBS60 Band Dendrometer, 1x Atmos-14, 1x MP406 Soil Moisture Probe.
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.
The MP406 provides a measurement on the absolute Volumetric Soil Water % (VSW), based on the Standing Wave, or Amplitude Domain Reflectometry (ADR) measurement principle.
See Further Specifications on the MFR-NODE
See Further Specifications on the DBS60 Band Dendrometer
See Further Specifications on the ATMOS-14
See Further Specifications on the MP406 Soil Moisture Probe Sensor
The modular nature of ICT International SNiPs allows for SNiP-SPW3 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 MFR-NODE can support 1x additional sensor to the base package.
The Multifunction Research Node has been designed to provide flexible communication, sensor and power options.
The MFR-NODE supports SDI-12 and 4 x dry contact digital inputs as well as optionally 2x differential / 4x single ended analogue inputs. The MFR-NODE supports 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). Optional CAT-M1 provide an option for remote installation and in areas outside the range existing LoRaWAN networks. The optional multiconstellation GNSS ensures you won’t lose track of your device. The MFR-NODE has an onboard 8GB SD Card to provide data logging capabilities and full data redundancy in the event of temporary loss of communications or dropped packets – ideal for research applications.
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.
Outputs:
Change in Tree Circumference (mm)
Temperature (°C)
Increment sensors type |
rotary position
|
Range | 64 mm of circumference |
Linearity |
2% of full scale
|
Resolution |
step-less
|
Tape strength
|
15 to 20 N in the whole range, stem diameter independent
|
Tape temperature coefficient:
|
17.3 x 10-6 per °C |
Operating range: | |
– Temperature |
-30 to 60°C
|
– Humidity | 0 to 100% |
Size | 100 x 70 x 100 mm |
Weight |
ca 260 g
|
Minimal stem diameter
|
8 cm |
Increment range
|
65mm |
Tightening strength | 15 to 20 N |
(Note: The Decagon VP-4 has been replaced by the Meter ATMOS 14).
RELATIVE HUMIDITY | |
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. |
EQUILIBRATION TIME (τ, 63%): |
< 40 s (response time in 1 m/s air stream) |
HYSTERESIS | < 1% RH typical |
LONG TERM DRIFT | < 0.5% RH/year typical |
TEMPERATURE | |
RANGE | -40°C to 80°C |
RESOLUTION | 0.1°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 |
EQUILIBRATION TIME (Τ, 63%) |
< 400 s (response time in 1 m/s air stream) |
LONG TERM DRIFT | < 0.04°C / year typical |
VAPOUR PRESSURE | |
RANGE | 0 to 47 kPa |
RESOLUTION | 0.01 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. |
BAROMETRIC PRESSURE | |
RANGE | 49 to 109 kPa |
RESOLUTION | 0.01 kPa |
ACCURACY | 0.4 kPa |
GENERAL | |
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 (NOT EXCLUSIVE) |
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+) |
Measure volumetric soil moisture for scientific research, agriculture and civil engineering.
The MP306 has a compact body and the needles are arranged in a single plane making it ideal for use in soil columns. It is also ideally suited to measuring pots in glasshouses and growth cabinets. The MP306 can also be installed in the field, with a lifespan of 20+ years in the most extreme conditions.
Measurement |
|
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 |
|
Input Requirements | 9-18 V DC unregulated |
Power Consumption | 24 mA typical, 30mA max |
Output signal | 0-1160mV for 0-100 VSW% |
Mechanical |
|
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 |
|
Environment | Designed for permanent or temporary burial |