Shown below is a wind speed and wind direction measurement system, with the following components:
HD53LS.S 2-axis ultrasonic anemometer with MODBUS-RTU output
HD35EDW-MB wireless data logger with MODBUS-RTU input
For this system, OTM also supplied a 2-meter-long stainless steel pole for mounting and wired/configured all instruments before delivery. The last step mechanical mounting was done by the end user. A USB dongle type base unit (HD35APD) was also included for manual downloading of monitoring data in a scheduled interval.
The instrument measures 3 velocity components (u, v, w velocity components) and 3 additional quantities (temperature, humidity, and barometric pressure), and calculates a number of derived quantities (wind speeds and directions, sonic temperature, and wind gust), as shown in the screen capture below: