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, Delta Ohm LPPYRA03 spectrally flat class C pyranometer was installed on a rooftop for solar irradiance monitoring.

The pyranometer outputs mV signal 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, Delta Ohm LPSILICON-PYRA04 silicon pyranometer, LPPHOT01 indoor lux sensor and LPPHOT03 outdoor lux sensor were used to monitor the solar radiation and daylight transmission through a thermochromic glass.

Custom mounting accessories were used to temporarily install the sensors on both the front and back sides of the glass.

The sensors output mV signal and a few 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, 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 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 project, the following instruments were integrated for far infra-red radiation monitoring:

• Delta Ohm LPPIRG01S pyrgeometer with MODBUS-RTU output
• Delta Ohm HD35EDW-MB wireless data logger supporting MODBUS-RTU output

The system was wired and configured by OTM. Refer to this blog post for more details.

A system was integrated by OTM for on-site glass optical & thermal property monitoring, with the following instruments:

• HD35 wireless data logging system
• LPPHOT01 illuminance sensor
• LPSILICON-PYRA04 silicone pyranometer

In additional to system integration, OTM also provided monitoring service with detailed report on project completion.

Refer to this blog post for more details: On-site glass optical & thermal property monitoring system.

In this application, the following instruments were integrated for far infra-red radiation monitoring:

• Delta Ohm PMsense particulate matter transmitter with MODBUS-RTU output
• Delta Ohm HD35EDW-MB wireless data logger supporting MODBUS-RTU output

The system was wired and configured by OTM. Refer to this blog post for more details.

A monitoring system was integrated and configured by OTM for on-site solar irradiance and daylight illuminance monitoring. The following Delta Ohm products were used:

• For solar irradiance measurement: LPSILICON-PYRA04 silicon pyranometer
• For daylight illuminance measurement: LPPHOT01 lux sensor
• For data logging: HD35EDWH outdoor type general purpose data logger
• For data transmission to cloud: HD35AP4G base unit with 4G connectivity

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, a LoRaWan based wireless data logging system was deployed by OTM. The system consists of:

• 1 × LoRaWan gateway (with 4G connectivity)
• 4 × Delta Ohm LR35 LoRaWan data loggers
• 10 × input channels (including temperature sensors, pyranometers, and heat flux sensors)

The system was fully integrated and configured by OTM. OTM also provides 1.5 years of maintenance and data collection services.

The instruments are distributed in various locations of two buildings. Shown below are two important instruments of the system (left: a LoRaWan data logger; right: the LoRaWan gateway).

In this application, an HD50 web data logger with an integrated CO2 probe was configured by OTM for CO2 level monitoring in an indoor space. The objective is to follow the advisory by NEA and BCA (document 1, document 2) to use CO2 level as a proxy to check the ventilation adequacy in an indoor space.

The end user just needed to do some simple last-step mechanical mounting. OTM performed all configurations before delivery. The end users need not to install and learn any software, as they can conveniently access the monitoring results from a cloud portal with a browser. Shown below are some results plotted in the cloud portal:

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.