Building an outdoor plant box with a built-in phosgene detector is a unique way to ensure your gardening space remains safe from harmful gases. Here’s a step-by-step guide to help you create this functional and safety-conscious project.

Materials Needed:

- Wooden planks (cedar or redwood for durability)

- Screws, nails, and wood glue

- Phosgene detector (available online or at safety supply stores)

- Drill, saw, and measuring tape

- Waterproof sealant

- Soil and plants

Step 1: Design the Plant Box

Sketch a design for your plant box, ensuring it has enough space for the phosgene detector. A rectangular box (24"x12"x12") works well for most plants.

Step 2: Cut and Assemble the Wood

Cut the wooden planks to size and assemble the box using screws and wood glue. Leave a small compartment near the base for the detector.

Step 3: Install the Phosgene Detector

Place the detector in the designated compartment, ensuring it’s easily accessible for maintenance. Secure it with brackets or adhesive.

Step 4: Seal and Finish

Apply waterproof sealant to protect the wood from moisture. Let it dry before adding soil and plants.

Step 5: Test the Detector

Turn on the phosgene detector and ensure it’s functioning correctly. Regularly check its readings to maintain a safe environment.

This DIY project combines gardening with safety, making it perfect for urban or industrial areas where air quality may be a concern. Happy gardening!