ATMOS 22 Ultrasonic Anemometer

Smart technology means better accuracy
If you want accurate wind profiling, a sonic anemometer is the obvious choice. Designed with canopies in mind, the ATMOS 22 sonic anemometer 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.
0.01 m/s resolution

Affordable, low-power sonic anemometer
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.

1000 times less power

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.

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

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

TECHNICAL SPECIFICATIONS

Horizontal Wind Speed:
Range: 0.00 – 30.00 m/s
Resolution: 0.01 m/s
Accuracy: the greater of 0.3 m/s or 3% of measurement

Wind Gust:
Range: 0.00 – 30.00 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 °

Tilt:
Range: -90 – 90 °
Resolution: 0.1°
Accuracy: ±1 °

Communication Specifications

Output:
SDI-12 communication
Data Logger Compatibility:
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

Physical Specifications:

Dimensions:
Diameter: 10.0 cm (3.94 in)
Height: 16.0 cm (6.30 in)

Operating Temperature Range:
Minimum: -50.00 °C
Maximum: 60.00 °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

Electrical and Timing Characteristics

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) — other commands
Typical: 130 ms

Power Up Time (SDI Ready) — aRx! commands
Typical: 10 s

Power Up Time (SDI-12, DDI Serial Disabled)
Typical: 200 ms

Measurement Duration
Typical: 110 ms
Maximum: 3000 ms