# Methane and Carbon Dioxide Case Case specifically for use with the Figaro NGM2611-E13, Adafruit DHT22, AtlasScientific EZO-CO2 sensor, and an external power source. Which informs the sensor plate, cable glands, and power supply (length of case).\ \[TODO: If we removed / generalized the sensor plate and cable glands requirements / instructions this could generally be for a 12" elongated case]: # ## Bill of Materials and Potential Supplier or Drawing | Item | Case Qty | Buy Qty | Supplier Part # / CAD link | | ---------------------------------------------------------- | ---------- | --------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | | 3" ABS Schedule 40 Pipe | 11" | 10' | [Menards 6881155](https://www.menards.com/main/plumbing/pipe-fittings/abs-pipe-fittings/10-abs-sch-40-plain-end-cellular-core-dwv-pipe/abs033000600hc/p-1444426392509-c-8562.htm) | | 3" ABS Hub x Hub Coupler | 2 | 1 | [Menards 6881537](https://www.menards.com/main/plumbing/pipe-fittings/abs-pipe-fittings/nibco-reg-hub-abs-dwv-coupling/i00975h/p-1444449159767-c-8562.htm) | | -341 EPDM 70A O-ring | 2 | 15 | [McMaster-Carr 9557K316](https://www.mcmaster.com/9557K316/) | | 18-8 Stainless Steel Threaded Rod 3/8" -16 | 3 | 2' | [McMaster-Carr 98920A031](https://www.mcmaster.com/98920A031/) | | 18-8 Stainless Steel Hex Nuts 3/8" -16 | 24 | 100 | [McMaster-Carr 91845A031](https://www.mcmaster.com/91845A031/) | | 18-8 Stainless Steel Washers 3/8" | 24 | 100 | [McMaster-Carr 92141A031](https://www.mcmaster.com/92141A031/) | | 5" Copper Mesh/Gauze | 20" | 100' | [McMaster-Carr 6361T16](https://www.mcmaster.com/6361T16/) | | Dow Corning 111 Molykote | Consumable | 5.3 Fl oz | [McMaster-Carr 1204K32](https://www.mcmaster.com/1204K32/) | | Dessicant Packet | 1 | 1000 | [McMaster-Carr 2189K34](https://www.mcmaster.com/2189K34/) | | 11" Cable Ties | 4 | 100 | [McMaster-Carr 7130K55](https://www.mcmaster.com/7130K55/) | | Dome Cap Cable Gland 1/2" NPT .19-.35" w/ O-Ring & Locknut | 1 | 1 | [elecDirect RDC13NR](https://www.elecdirect.com/cord-grips-strain-relief/cable-glands/dome-cap-cable-gland-1-2-npt-19-35-black-complete-with-o-ring-locknut) | | Dome Cap Cable Gland .11-.26" w/ O-Ring & Locknut | 1 | 1 | [elecDirect RDC07AA](https://www.elecdirect.com/cord-grips-strain-relief/cable-glands/dome-cap-cable-gland-pg7-11-26-black-complete-with-o-ring-locknut) | | 3/4" wide Velcro | 1" | 5' | [McMaster-Carr 9273K13-9273K133](https://www.mcmaster.com/9273K13-9273K133/) | | 18-8 Stainless Steel Phillips Flat Head #6 x 1/2" Screws | 6 | 100 | [McMaster-Carr 90065A148](https://www.mcmaster.com/90065A148/) | | 3/4" x 3/4" Nylon Bar | 1' | 1' | [McMaster-Carr 8732K17](https://www.mcmaster.com/8732K17/) | | 1/4" Clear Acrylic Lid Plate\* | 1 | NA | [CAD Drawing 3inch](https://github.com/rrivirr/sonde/tree/master/panels) | | 1/4" Clear Acrylic Sensor Plate\* | 1 | NA | [CAD Drawing 3inch](https://github.com/rrivirr/sonde/tree/master/panels) | | 1/4" Clear Acrylic Cage Plate\* | 1 | NA | [CAD Drawing 3inch](https://github.com/rrivirr/sonde/tree/master/panels) | | ABS Cement | Consumable | NA | [Menards 6932185](https://www.menards.com/main/plumbing/plumbing-installation-repair/pipe-cements-cleaners-primers/oatey-reg-medium-black-abs-cement-4-oz/309995/p-1444449932067-c-8530.htm?tid=-7621218153408053791\&ipos=1) | \*[Flare Tech Laser & Design](https://flaretechlaser.com/) ## Diagrams \[TODO: add images to markdown file ![alt text](https://github.com/\[username]/\[reponame]/blob/\[branch]/image.jpg?raw=true) ]:# [Annotated Case Diagram](https://rriv.gitbook.io/rriv-documentation/build/methane_case_1ft)[3" Acrylic Plates CAD drawing](https://github.com/rrivirr/sonde/tree/master/panels) ## Build Process ### Tools & Skills * [Horizontal/Vertical Metal Cutting Band Saw](https://www.harborfreight.com/horizontal-vertical-metal-cutting-bandsaw-93762.html) to cut steel threaded rod to length * [Reed TC4QP Tubing Cutter for plastic pipe](https://www.reedmfgco.com/en/products/plastic-pipe-tools/quick-release-tubing-cutters-for-plastic-pipe/tc4qp/) to cut ABS to length * 2x [9/16 SAE combination wrench](https://www.mcmaster.com/56255A34/) for hex nuts * [Milwaukee 6in Diagonal Cutting Pliers](https://www.milwaukeetool.com/Products/Hand-Tools/Pliers/Diagonal-Cutters/48-22-6106) for copper mesh and cable ties * Measuring tape * \#2 phillips head screw driver / drill bit ### Parts Fabrication * Cut steel threaded rod in half to 1' lengths * Cut two 1-21/32" length sections of ABS, 20/32 to 22/32 is acceptable, too little won't hold the o-ring in place, too much won't compress the o-ring enough to seal properly * Cut 20" of copper mesh x2 * Attach both cable glands through their respective holes in acrylic sensor plate ### Assembly & Waterproofing 1. Add cable glands to sensor plate 2. Insert ABS 1-21/32" length into each end of coupling 3. Add O-Rings around ABS 4. Add nuts & washers to rods 5. Add plates & housing to rods 6. Wrap copper mesh around sensor cage and use cable ties to hold in place --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://rriv.gitbook.io/rriv-documentation/build/methane_case_1ft.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. 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