Assembly and wiring guide for the radiation shield and its temperature, humidity, and pressure sensors.
How the Sensors Work
The radiation shield houses integrated environmental sensors to ensure accurate readings:
Temperature: Monitored via the SHT31D & MCP9808 which measures ambient air temperature using a precision thermistor.
Relative Humidity: Detected by the SHT31D, which calculates moisture levels via capacitance changes in a polymer layer.
Atmospheric Pressure: Measured by the BMP390, a piezoresistive sensor that converts pressure changes into digital signals.
Wiring:
All three sensors connect via I2C (shared SDA/SCL lines) to minimize wiring complexity. The radiation shield’s passive ventilation design protects sensors from direct sunlight, precipitation, and debris while maintaining airflow for precision.
Instruction Slides for Wiring the Sensors
Assembling the Radiation Shield
The radiation shield is a passively ventilated enclosure that protects temperature, humidity, and pressure sensors from environmental interference while maintaining airflow for accurate measurements. Its multi-plate design minimizes exposure to direct sunlight, precipitation, and debris, while allowing ambient air circulation. The shield reduces radiative heating and thermal inertia, ensuring sensors measure true ambient air conditions rather than artificial microclimates.
Instruction Slides for Assembling the Radiation Shield
Tutorial Video for Assembling the Radiation Shield
This video demonstrates the entire assembly of the instrument. There is only one video in this particular playlist.
