SNiP-MC24
The SNiP-MC24 is 'Sensor Node Integrated Package' for LoRaWAN or CAT-M1 communication of real-time weather parameters within a microclimate atmospheric zone for continuous environmental monitoring of a particular site.
SNiP-MC24
The base SNiP-MC24 integrates 1x S-NODE and two sensors to a site’s unique network, communication and power requirements: 1x ATMOS-14 Temp & Humidity Sensor, and 1x ATMOS 22 Sonic Anemometer.
The ATMOS-14 measures Air Temperature (°C), Relative Humidity (RH %), Barometric Pressure (kPA), Vapour Pressure (kPa), with or without a passive radiation shield.
The ATMOS 22 measures Wind Speed (m/sec), Wind Direction (°), and Wind Gust Speed (m/sec).
See Further Specifications on the S-NODE
See Further Specifications on the ATMOS-14 Temp & Humidity Sensor
See Further Specifications on the ATMOS 22 Sonic Anemometer
Further parameters can be added to the SNiP, without requiring loggers to match each distinct sensor, substantially reducing the cost of getting a fuller picture on the application. The S-NODE can support 2x additional sensors to the base package.
ATMOS 22 Sonic Anemometer
- Measures Horizontal Wind Speed and Direction
The ATMOS 22 is a rugged, research-grade two-dimensional sonic anemometer built specifically for agricultural, forestry, and environmental research applications.
- Accurate at Low Wind Speeds
A lower wind speed threshold of 0 m/s makes the ATMOS 22 especially well-suited for measuring wind within plant canopies, where wind speeds are often below the threshold of a cup anemometer. And with a resolution of 0.01 m/s, the ATMOS 22 is capable of recording fine-scale variations in wind speeds within and above plant canopies.
- No Maintenance Required
The ATMOS 22 is designed for long-term, maintenance-free operation. No moving parts means no mechanical wear and no need for oiling or replacing bearings.
- Never Needs Calibration
The ATMOS 22 uses ultrasonic sound waves to measure wind velocity and direction. Because this measurement comes from first principles, the ATMOS 22 doesn’t ever need to be calibrated once it leaves the factory.
- Uses Very Little Power
The ATMOS 22 requires 100 to 1000 times less power than other ultrasonic anemometers. It’s built to run six months or more on the five AA batteries in Em50 series data loggers without significantly affecting battery life. Note: the ATMOS 22 is also compatible with other data loggers. See specifications for more information.
- Low Cost
Most agricultural and environmental researchers use wind as just one variable among many. Occasionally the scientific objectives of a study require multiple simultaneous measurements of wind to capture vertical or horizontal heterogeneity in the environment. A primary design goal of the ATMOS 22 is to provide high accuracy wind speed and direction at a price that opens up research options, including greater spatial coverage.
- Customised for Environmental Research
Wind speed and direction are fundamental measurements necessary for a wide range of agricultural, forestry, and micrometeorological applications. The ATMOS 22 was designed to put the accuracy and low maintenance benefits of sonic anemometers in a sensor built specifically for these applications. The ATMOS 22 is not intended as a replacement for the high-end three dimensional sonic anemometers used by micrometeorologists. It is designed to provide agricultural and environmental researchers a high accuracy, low maintenance solution for measuring horizontal wind speed and direction.
- Output
The ATMOS 22 reports wind speed and maximum gust speed in meters per second with a resolution of 0.01 m/s. It also reports wind direction with a resolution of 1 degree. If the sampling rate is greater than 0.1 Hz, the anemometer reports the speed and direction at the time of sampling. If sampled less frequently, the anemometer samples every 10 seconds, averages the vector components of the wind, and records the maximum gust during the specified sampling period.
- Collect Data and Monitor Remotely
Monitor wind speed and direction from your office, phone, or any internet-connected device by connecting the ATMOS 22 sonic anemometer to an Em50G data logger. The Em50G setup allows you to get near-real time information, check sensor and system function, and download data from sites that are difficult to access.
- Data Logging
The ATMOS 22 Sonic Anemometer is an SDI-12 digital sensor available with either a single 3.5 mm stereo connector or stripped and tinned wire leads. When purchased with a stereo connector, the ATMOS 22 can be plugged directly into Meter/Decagon’s Em50 series data loggers. Wind speed, direction, and maximum gust data are all transmitted through a single stereo connector. No programming is needed. The ATMOS 22 Sonic Anemometer is also compatible with Campbell Scientific and other SDI-12 capable data loggers. When used with certain data loggers, the ATMOS 22 also reports air temperature from an onboard thermistor.
ATMOS 14 Temp & Humiditiy
- SDI-12 Compatible
Integrate into non-Decagon data loggers with the easy-to-use SDI-12 communication protocol.
- Compact
This 5 cm x 2 cm sensor is able to fit into the smallest of spaces.
- Weatherproof
Thanks to its unique Teflon screen, the relative humidity sensor can survive a deluge. Naturally, it won’t be transmitting accurately while waterlogged; but as soon as it has dried out, it’s back in the game.
- Fast Response
The Teflon screen protects the sensor from liquid water and dust without limiting diffusion of water vapour. The protected sensor is still able to quickly respond to changes in humidity.
- Integrated Temperature for Accuracy
Accurate relative humidity readings require accurate air temperature readings taken at the same place and time. This sensor takes both measurements simultaneously for the best possible accuracy.
- Radiation Shield Included
The included radiation shield is designed to improve air temperature readings by minimising radiation and maximising airflow over the surface of the sensor. Specially designed to preserve the correlation between actual air temperature and sensor air temperature while keeping the shield size small.
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
ATMOS 22 Sonic Anemometer
The ATMOS 22 is a rugged, research-grade two-dimensional sonic anemometer built specifically for agricultural, forestry, and environmental research applications. A lower wind speed threshold of 0 m/s makes the ATMOS 22 especially well-suited for measuring wind within plant canopies, where wind speeds are often below the threshold of a cup anemometer. And with a resolution of 0.01 m/s, the ATMOS 22 is capable of recording fine-scale variations in wind speeds within and above plant canopies.
Note: The DS-2 is being replaced by the Meter ATMOS 22. The ATMOS 22 features improved firmware and hardware components, and outputs an additional parameter (wind gust). If replacing a DS-2 with an ATMOS 22, changes will need to be made to your datalogger setup to allow for this additional parameter.
| WIND SPEED RANGE: | 0 to 30 m/s |
| WIND SPEED RESOLUTION: | 0.01 m/s |
| WIND SPEED ACCURACY: | 0.30 m/s or < 3%, whichever is larger |
| WIND DIRECTION RANGE: | 0 to 359 degrees |
| WIND DIRECTION RESOLUTION: | 1 degree |
| WIND DIRECTION ACCURACY: | ±3 degrees |
| OPERATING TEMPERATURE RANGE: | -40 to 50°C |
| EXCITATION VOLTAGE: | 3.6 to 15 VDC |
| CURRENT: | 0.03 mA quiescent, 0.5 mA sampling, < 0.05 mA average |
| DATA LOGGER COMPATIBILITY (NOT EXCLUSIVE): | Meter/Decagon Em50 Series, ProCheck. (SDI-12) |
| DIAMETER: | 100 mm |
| HEIGHT (WIND SENSOR): | 75 mm |
| HEIGHT (TOTAL W/ MOUNT): | 155 mm |
| MAXIMUM SAMPLING SPEED1: | 1 Hz |
| OUTPUT1: | average speed, gust speed, direction, or vector |
| CONNECTOR TYPES: | 3.5 mm (stereo) plug or stripped & tinned lead wires (Pigtail) |
| CABLE LENGTH: | Standard is 5m, though we have custom cable lengths available upon request |
| 1If sampling rate is greater than 0.1 Hz, the anemometer reports the speed and direction at the time of sampling. If sampled less frequently, the anemometer samples every 10 seconds, averages the vector components of the wind, and keeps the maximum gust. When the logger samples, the anemometer reports the average wind speed, direction, and the maximum gust speed. | |
ATMOS 14 Temp & Humiditiy
| 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+) |
