Instrument for outdoor micro-environment measurement

Related instruments Temperature & humidity, Air speed & wind, Thermal comfort

Shown below is a system integrated by OTM for outdoor micro-environment measurement:

The system consists of the following components:

  • HD52.3DP17: ultrasonic anemometer for wind speed, wind direction, temperature, humidity, and solar irradiance measurement
  • TP876.1.I: 50 mm globe thermometer
  • HD33MT.4: data logger supporting 4G communication

At the customer’s request, we also customized a stand for the system. A similar system was customized by OTM before. The new system has castor wheels and it is easy to move the system around for measurement.

The power consumption of the system is very low. With the internal 3.4 Ah battery, the system can run for around 5 days without charging. The data can be directly downloaded via a USB cable. With a 4G SIM card, it is possible to connect the data logger to the cloud.

Wind speed & direction measurement with Delta Ohm HD53LS ultrasonic anemometer

Related instruments Weather stations, Wireless & web data loggers, Air speed & wind

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.

HD2003 3-axis ultrasonic anemometer

Related instruments Weather stations, Wireless & web data loggers, Air speed & wind

Shown below is a Delta OHM HD2003 3-axis ultrasonic anemometer (undergoing testing in our office):

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:

In this application, the data collected by HD2003 is logged by Delta OHM HD35EDW-MB wireless data logger with MODBUS-RTU input.

All-in-one weather station for weather and air quality monitoring

Related instruments Pyranometers, Temperature & humidity, Weather stations, Wireless & web data loggers, Air speed & wind, Air quality sensors

Shown below is an all-in-one weather station supplied by OTM for weather and air quality monitoring.

The system consists of the following components:

The system is fully integrated and completely independent. The data are uploaded to Delta Ohm cloud every 2 minutes. OTM also provides 2-year maintenance services to the instruments.