Expert in Optical & Thermal Measurement Solutions
We recently supplied an ISO 9060 spectrally flat Class A albedometer with a data logger and tripod to a customer in Singapore. Shown below are a photo of the system and a screenshot of the data logging software.
Listed below are the components in the system:
Shown below is a wind speed and wind direction measurement system, with the following components:
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.
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.
A LoRaWan based wireless data logging system was recently deployed by OTM. The system consists of:
The system was fully integrated and configured by OTM. OTM will also provide 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).
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:
The system is a fully automated system. The results are automatically logged and uploaded to the cloud, without site visits and manual operations.
A system was integrated by OTM for construction site particulate matter (PM1.0, PM2.5 & PM10) measurement, with the following components:
Listed below are the key specifications:
A measurement system was integrated by OTM for on-site glass optical & thermal performance monitoring. The system uses off-shelf sensors and wireless data loggers and can be easily deployed for 24×7 glass performance monitoring projects.
The system consists of two indoor measurement systems (reference room vs. test room) and one outdoor measurement system. Shown below are the system schematics.
The following quantities are measured:
The system is for glass optical & thermal performance monitoring only. The results are qualitatively correlated to glass visible light transmittance and solar energy transmittance.
However, it is not possible to quantitatively evaluate glass optical & thermal properties rated under standard conditions (e.g. visible light transmittance, U-value, and shading coefficient) from the monitoring results. If such quantities are required, please consider our laboratory glass testing service.
The following instruments from Delta Ohm were used in the monitoring system:
Necessary mounting accessories were included. The instruments can be conveniently installed on-site in less than 1 hour. Shown below is a photo of the outdoor side instruments in the demo installation.
Shown below is a screen capture of some monitoring results (in the wireless data logger control software).
An in-house software can be used to automate the data processing part, as shown below.
Shown below are some sample results:
The system below was wired and configured by OTM for far infra-red radiation measurement, with the following components:
Listed below are the key specifications:
