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Enabling better global research outcomes in soil, plant & environmental monitoring.

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.

 

Utilising the ATMOS-22 sensor in a custom IoT (Internet of Things)

The SNiP-SA22 is a ‘Sensor Node Integrated Package’ for LoRaWAN or CAT-M1 communication of real-time weather parameters for continuous environmental monitoring.

The base SNiP-SA22 integrates 1-4x ATMOS 22 Sensors with 1x S-NODE to a site’s unique network, communication and power requirements. The S-NODE can support an added 3x Sensors.

Alternatively, the base SNiP-MC24 integrates 1x MFR-NODE with two sensors: 1x ATMOS-14 Sensor and 1x ATMOS 22 Sonic Anemometer for a particular site and network. The MFR-NODE can support an added 2x Sensors. With the ATMOS 22 and the ATMOS-14 combined, multiple atmospheric parameters can all be continuously measured in real-time including: Wind Speed, Direction & Gust Speed, Air Temperature, Relative Humidity, Barometric Pressure and Vapour Pressure.

 

Measure 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.

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.