Drone Gas Sampling Enclosure

Create a rectangular electronic and pneumatic enclosure for a drone-mounted gas sampling module. The overall external dimensions should be approximately 220 mm (length) x 160 mm (width) x 100 mm (height). Use a wall thickness of 3 mm. The enclosure should have a removable lid (top panel). Inside the enclosure, create the following simplified mounting features: Two cylindrical cradles (internal diameter 26 mm, length 160 mm) positioned side-by-side with a 5 mm gap between them. These are to hold two compact glass gas pipettes (actual diameter 24 mm, length 150 mm). Add a 2 mm foam padding clearance (model the cradles as hollow half-cylinders or U-shaped slots with 2 mm wall thickness). A rectangular recess (80 mm x 40 mm, depth 15 mm) at one end of the enclosure to accommodate a membrane contactor cartridge (actual dimensions: Ø43 mm x 222 mm). Note: The cartridge is longer than the enclosure, so model this as a semi-circular cutout on the external wall to allow the cartridge to protrude out, or simply create an external cylindrical tube (Ø48 mm) attached to the side. Choose the external tube approach for simplicity. A small mounting area (50 mm x 30 mm) for two miniature solenoid valves (actual valve size: 50x22x22 mm). Include four M2.5 screw bosses (height 5 mm, hole diameter 2.7 mm). A flat mounting area (70 mm x 50 mm) with four M3 screw bosses (height 8 mm, hole diameter 3.2 mm) for the main PCB and vacuum pump. Routing channels: Add two semi-circular channels (width 6 mm, depth 4 mm) along the inner side walls for water tubing and electrical cables. Add two cutouts (15 mm x 10 mm) on the side wall for cable exit. Sensor mounting: Add a small 12 mm diameter hole on the top edge for a temperature/humidity sensor (SHT30) with a recess for a PTFE membrane. Add 1 mm fillets to all external vertical edges and 2 mm fillets to the top and bottom outer edges. Ensure the lid has a 0.5 mm clearance gap for assembly. The model should be a single solid body suitable for 3D printing (STL export).

Parameters

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