UltraSonic Anemometer


Measuring into stiff headwinds

Measuring wind has always involved tradeoffs. Cup anemometers can’t measure both wind speed and wind direction (or low wind speeds). And they’re prone to malfunction since they contain moving parts. Meanwhile, sonic anemometers have always been too costly. Until now.

The best of both worlds

The wind-tunnel-tested ATMOS 22 ultrasonic anemometer delivers the best of both worlds. It’s accurate at low wind speeds because there aren’t any moving parts that cause friction or fail. And it’s inexpensive, especially when you consider the low-energy design. Accuracy. Dependability. Affordability. You get all three with the ATMOS 22.

Accuracy that will blow you away

If you want accurate wind profiling, a sonic anemometer is the obvious choice. Designed with canopies in mind, the ATMOS 22 registers even the lowest thresholds of wind speed (0 m/s) with the added ability to detect fine-scale variations within 0.01 m/s resolution.

Contrast the ATMOS 22’s advanced technology to a cup or propeller wind anemometer. Neither will spin if wind speed is too low. Cup anemometers also don’t indicate wind direction, unless you combine them with a wind vane. And both are prone to additional inaccuracies due to worn out moving parts. But with the ATMOS 22, you can accurately measure wind speed anywhere, every time, with total confidence.

Wind measurement is now a breeze

The ATMOS 22 was designed without moving parts, meaning there’s never any mechanical wear. No oiling or replacing bearings. And no recalibration required. Just reliability you can continue to count on.

Not only does its ultra-low power consumption make it ideal for long-term, remote installations, but its compact size makes it small enough to deploy inside canopies. And instead of having to make field visits to collect data and check sensor and system functions, you can monitor information in real time and download data using any internet-connected device by connecting the ATMOS 22 to a ZL6 data logger. Which not only saves you time, but provides worry-free operation and peace of mind.

A low-cost sonic anemometer. Yes, you heard right.

The ATMOS 22 is not only far more affordable than other sonic anemometers but also uses 100 to 1,000 times less power. Running on less than 100 uA, the ATMOS 22 frees you to make wind measurements in multiple locations without having to constantly change batteries.

Sounds like a smarter way to measure wind. Because it is.

The precise accuracy, yet low-maintenance of sonic measurement. The low-cost of a regular anemometer, plus even lower power consumption. The ATMOS 22 was engineered to offer a wide range of advantages across the widest range of wind speed, all for an affordable price.

Request a quote Contact us Knowledge base ATMOS 22


  • Wind speed and direction
  • Easy installation
  • No moving parts
  • All data transmitted over a single wire
  • Digital SDI-12 communication
  • Connect to ZL6 for data capture and management


View GSA details


Horizontal wind speed

Range: 0–30 m/s
Resolution: 0.01 m/s
Accuracy: the greater of 0.3 m/s or 3% of measurement

Wind gust

Range: 0–30 m/s
Resolution: 0.01 m/s
Accuracy: the greater of 0.3 m/s or 3% of measurement

Wind direction

Range: 0°–359°
Resolution: 1°
Accuracy: ±5°


Range: -90° to 90°
Resolution: 0.1°
Accuracy: ±1°



SDI-12 communication

Data logger compatibility (not exclusive)

METER ZL6, Em50, and EM60 data loggers or any data acquisition systems capable of 3.6- to 15.0-VDC excitation and SDI-12 communication



Diameter: 10 cm (3.94 in)
Height: 16 cm (6.30 in)

Operating temperature range

Minimum: –50 °C
Maximum: 60 °C

Cable length

5 m (standard)
75 m (maximum custom cable length)

NOTE: Contact Customer Support if a nonstandard cable length is needed.

Connector types

3.5-mm stereo plug connector or stripped and tinned wires


Supply voltage (VCC to GND)

Minimum 3.6 VDC continuous
Maximum 15.0 VDC continuous

NOTE: The ATMOS 22 must be continuously powered to work properly.
NOTE: For the ATMOS 22 to meet digital logic levels specified by SDI-12, it must be excited at 3.9 VDC or greater.

Digital input voltage (logic high)

Minimum: 2.8 V
Typical: 3.6 V
Maximum: 5.0 V

Digital input voltage (logic low)

Minimum: –0.3 V
Typical: 0.0 V
Maximum: 0.8 V

Digital output voltage (logic high)

Typical: 3.6 V

NOTE: For the ATMOS 22 to meet digital logic levels specified by SDI-12, it must be excited at 3.9 VDC or greater.

Power line slew rate

Minimum: 1.0 V/ms

Current drain (during measurement)

Minimum: 0.2 mA
Typical: 8.0 mA
Maximum: 33.0 mA

Current drain (while asleep)

Minimum: 0.2 mA
Typical: 0.3 mA
Maximum: 0.4 mA

Power up time (SDI Ready)—aRx! commands

Typical: 10 s

Power up time (SDI Ready)—other commands

Typical: 130 ms

Power up time (SDI-12, DDI disabled)

Typical: 200 ms

Measurement duration

Typical: 110 ms
Maximum: 3,000 ms


Manufactured under ISO 9001:2015
EM ISO/IEC 17050:2010 (CE Mark)

California requires the following notice:

⚠️ WARNING: This product may contain chemicals including ethylene glycol, lead, nickel, styrene and cadmium, which are known to the State of California to cause cancer, birth defects or other reproductive harm. For more information, go to www.P65Warnings.ca.gov



Have a question or problem? Our support team can help.

We manufacture, test, calibrate, and repair every instrument in-house. Our scientists and technicians use the instruments every day in our product testing lab. No matter what your question is, we have someone who can help you answer it.

Email Europe: sales.europe@metergroup.com


Phone US: +1 509-332-5600
Phone Europe: +49 89 12 66 52 0


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