Helical rain/radiation shield for weather sensors with sensor mounting

thingiverse

This is a small weather shield I created for an outdoor temperature/RH/barometric pressure sensor. Prints without supports (upside down). The mounting is designed to fit a common breakout board style used for the BME 280 sensor, though any sensor that fits in the housing could be used. The standoffs are sized to allow either #4-40 or 3mm screws to self tap. If a different hole spacing, or size, would help you, let me know as that should be a fairly simple edit. This thing is a new version of my older design: https://www.thingiverse.com/thing:3178180 Adding a retaining system and a mount for the sensor was the main improvement in this design. In my previous version I had glued the sensor in place, but it had no protection. Commercial housings for BME 280 sensors typically employ a mesh screen to allow air to pass but protecting against dust and water droplets. I designed the sensor mount to fit a garden hose strainer to provide the mesh. The shield itself has a ring protruding downward, with an internal retaining groove. The sensor mount has springy teeth on the periphery that will click into the retaining groove. This arrangement keeps the sensor housing thermally isolated, and also allows removal of the sensor assembly. The sensor mount has a wire pass-through hole with a drip shield to prevent water from entering, and to allow a pocket for sealing around the wire. I used hot melt adhesive for this. There are a few variations of mounting styles, the old flat flange, a new standoff version, as well as one with a perforated straight arm to allow installation to an existing bracket with screws or cable ties.