In this project, Delta Ohm HD2013UA tipping bucket rain gauge and HD52.3DP147 ultrasonic anemometer with integrated temperature, humidity, barometric pressure and solar irradiance measurement capabilities were used for weather monitoring in a public garden.

The instruments output standard 4 – 20 mA or MODBUS-RTU signal and are integrated to a building management system (BMS).

In this project, Delta Ohm HD52.3D ultrasonic anemometer was installed on a rooftop for wind speed and wind direction monitoring.

The instrument outputs 4 – 20 mA signals and a Delta Ohm HD35 wireless data logger was used to record the readings.

For this project, OTM provided full installation and data reporting service.

In this project, the following instruments were integrated to monitor solar radiation, daylight, thermal comfort and weather:

• LPPYRA03 spectrally flat class C pyranometer
• LPPHOT01 indoor lux sensor
• LPPHOT03 outdoor lux sensor
• HD9008TRR temperature & humidity transmitter
• TP875.I globe thermometer
• HD403TS2 omni-directional hot wire airspeed transmitter
• HD52.3D ultrasonic anemometer

All instruments were mounted on tripod. Delta Ohm HD35 wireless data loggers were used to record the readings.

For this project, OTM provided full installation and data reporting service.

In this project, the following instruments were integrated for thermal comfort monitoring:

• HD9008TRR temperature & humidity transmitter
• TP875.I globe thermometer
• HD403TS2 omni-directional hot wire airspeed transmitter

All instruments were mounted on a base. Delta Ohm HD35 wireless data loggers were used to record the readings.

The system was designed and integrated by OTM.

In this application, the following instruments were integrated for weather and air quality monitoring:

• HD52.3DP17 ultrasonic anemeter: for wind speed, wind direction, temperature, humidity and solar irradiance measurement.
• PMsense particulate matter transmitter: for PM1.0, PM2.5 and PM10 measurement
• HD33MT.4 data logger: with 4G connectivity
• Solar panel and tripod

More than 10 such stations were installed in different locations in Singapore. OTM provides integration, installation, and maintenance services. Shown below is an example of the installations.

In this application, the following instruments were used:

• HD53LS.S 2-axis ultrasonic anemometer with MODBUS-RTU output
• HD35EDW-MB wireless data logger with MODBUS-RTU input
• HD35APD USB dongle type base unit for wireless data loggers

OTM also supplied a 2-meter-long stainless steel pole for instrument mounting. The instruments were wired and configured by OTM prior to the delivery. The last step mechanical mounting was done by the end-user with our on-site technical assistance.

Shown below is a system integrated by OTM for outdoor thermal comfort measurement:

Below are the key features of the system:

• Four quantities are measured: air temperature, relative humidity, airflow speed and globe temperature
• Data logger included
• With 4G connectivity and cloud service
• With solar panel
• Suitable for outdoor 24×7 monitoring
• The height of the stand is adjustable in the range of 0.9 m to 1.5 m

Shown below is a screenshot of the cloud service portal:

Listed below are the key components in the systems:

• Data logger: HD33MT.4 data logger
• Air temperature & relative humidity sensor & solar radiation shield: HD9009TRR & HD9007A-1
• Globe thermometer: TP876.1.I
• Omni-directional hotwire anemometer: HD4V3TS2