Measure Horizontal Wind Speed and Direction
The DS-2 is a rugged, research-grade two-dimensional sonic anemometer
built specifically for agricultural, forestry, and environmental
Accurate at Low Wind Speeds
A lower wind speed threshold of 0 m/s makes the DS-2 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 DS-2 is capable of recording fine-scale variations in
wind speeds within and above plant canopies.
No Maintenance Required
The DS-2 is designed for long-term, maintenance-free operation. No
moving parts means no mechanical wear and no need for oiling or
Never Needs Calibration
The DS-2 uses ultrasonic sound waves to measure wind velocity and
direction. Because this measurement comes from first principles, the
DS-2 doesn't ever need to be calibrated once it leaves the factory.
Uses Very Little Power
The DS-2 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 DS-2 is also compatible with other data loggers.
See specifications for more information.
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 DS-2 is to provide high accuracy wind speed and direction at a
price that opens up research options, including greater spatial
Customized for Environmental Research
Wind speed and direction are fundamental measurements necessary for a
wide range of agricultural, forestry, and micrometeorological
applications. The DS-2 was designed to put the accuracy and low
maintenance benefits of sonic anemometers in a sensor built specifically
for these applications.
The DS-2 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
The DS-2 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 DS-2 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.
The DS-2 Sonic Anemometer is an SDI-12 digital sensor available with
either a single 3.5 mm stereo connector or stripped and tinned wire
When purchased with a stereo connector, the DS-2 can be plugged
directly into 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 DS-2 Sonic Anemometer is also compatible with Campbell Scientific
and other SDI-12 capable data loggers. When used with certain data
loggers, the DS-2 also reports air temperature from an onboard