Met One 50.5

Ultrasonic wind speed/direction sensor

Part # 93560

50.5 ultrasonic wind sensor

The 50.5 Solid State Wind Sensor is a continuation of the development work started with NOAA on sonic wind sensors over 25 years ago. This sensor design contains the same wind distortion algorithm and factoring that has been proven and accepted in applications around the world.

No other sensor technology has the history of time proven field performance comparable to the Series 50.5 Sensor.

  • No moving parts
  • Digital and analog outputs
  • Built-in sensor emulation
  • 16-point wind tunnel calibration with each sensor
  • Data output is field set to user requirements
  • Optional heating unit allows continuous operation in ice and snow
  • Low maintenance

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What's the Easiest and Quickest Way to Start Collecting Data and Access it Anywhere?

The Answer's in the Cloud.

eTracker is a cellular modem and "virtual" cloud-based data logger in one (meaning you don't need to install a separate data logger). Simply connect your sensor and a power source to eTracker and you're done. Configure (or reconfigure) anytime from any Internet-connected device, and use Stevens-Connect to retrieve your data, or forward it to your favorite software system.

Technical Specifications

Wind speed


0 - 50 m/sec standard


±0.2 m/sec < 11.3 m/sec or ±2 % > 11.3 m/sec


0.1 m/sec

Wind direction


0° - 360°





Sampling Rate:

5 per second

Data Output Rate:

1 per second

Sonic Frequency:

200 kHz

Output signals

Wind Speed Voltage:

0 to 1, 2.5 or 5 VDC

Wind Direction Voltage:

0 to 1, 2.5 or 5 VDC


1200 to 19.2K Baud (9600 Baud Standard)

Optional Digital Outputs:

SDI-12, RS-422, RS-485 (specified at time of purchase)