Public Lab Wiki documentation



hydrogen sulfide sensing review

This is a revision from January 19, 2012 00:43. View all revisions
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Questions for H2S testing

  • are we still developing electronic sensors? weren’t they not sensitive enough?
  • acute vs. long-term hazardous exposure levels.

  • accessibility of development process -- need lab for safety? no--

    • send mathew test strips and he will do “bokashi” comparison

Goal for month: Follow up with James? Organize research notes better, acceptable exposure levels--get mat started on this. Proposed goal for three months: identify ways to test this without a gas well - like with compost or poop, more public events to build/test this tool, calibrate with LUMCON, Intrepretation Proposed goal for six months: Field testing, more photos of this being built/tested Proposed over all goal for year: - consolidation of build instructions and price lists

2012 tool goals:

  • more public events to build/test this tool
  • identify ways to test this without a gas well - like with compost or poop
  • better identify specific sites where it could be useful, or it could be tested. exact locations, like “Rick’s backyard” or “my faucet”
  • once data is captured and documented with the prototype, starting to think about how that information can be presented/analyzed, incorporated into effecting change -- how do you act on it? storyboards...
  • consolidation of build instructions and price lists

Overall: looks good, could use a bit of work on organizing the research for newcomers, ready for fieldwork and testing in public events.

History/context of tool

  • what inspired it? Garfield, CO, h2s sink contamination
  • who (all) designed/developed/tested it? Where? - James Schaffroth and Sara Wylie. Jeff Warren (digital) Shannon Dosemagen, Battlement Mesa Citizen's Alliance, and LUMCON.
  • where has it been used and how did it go? - James’ Providence, RI apartment, ongoing?
  • how specialized is demand for the tool? - mostly in gas extraction sites?

Replicability

  • documentation, transmission to new users - leading image of circuit board is nice, notes offer Arduino code. James’ diagram is nice but a bit abstract
    • exposure level info
  • tools needed? - good listing of materials for film technique, require a little bit of digging in the research notes. No parts list for circuit but good photographs and diagrams (with a bit of digging)
  • skills needed? - what knowledge does it assume? difficulty? - Film technique seems manageable by almost anyone. Circuit technique assumes Arduino familiarity.
  • materials needed - supply chain limitations - good links for purchasing all film materials, though no price list apparent. no clear parts list for circuit and no link to where to purchase the figaro sensor.
  • safety - exposure to H2S warnings might be a good idea

Development

  • what is it costing us in staff hours?
  • what is it costing in materials? - no price lists yet (incorrect, there are, but buried)
  • COTS (consumer-off-the-shelf) effects - Very nice reuse of film, should be easy to get a hold of. Arduino is easy to acquire in many places, but the Figaro sensor may be a bottleneck

Maintenance

  • what are the per-use costs? - unknown, early stage
  • what are wearing parts? (frequency of replacement) - unknown, early stage

Accessibility/legibility

  • are there opportunities for people to participate/contribute - ample and well-described, in text, on the tool page. No events though.
  • formats: online/offline? - film requires no digital parts at all. Arduino will result in a long text log, which could benefit from overlay on a map, or graphing over time, and an easier way to view/browse data.
  • cost? (dollars, time) - posted for figaro sensor but nothing else that I could find, but early stage
  • access to materials, components - see above, Figaro sensor bottleneck. Film sounds fine.
  • language barrier? - early stage
  • language: domain-specific, insider/outsider - very accessible, not much jargon (“assay”). Could better show an actual strip of film before/after exposure.

Change effected

  • how has it measurably/materially affected:
  • local ecology - early stage
  • available/actionable information? - early stage, would be nice to see this tested soon
  • decision making - early stage
  • legal, policy, regulatory - early stage
  • enables participation in a formerly closed information loop - could use some context about how gasfield workers use sensors already and the availability/ability/cost of commercial sensors on the market already. But yes, most people don’t have these, so if people get/use them, this will improve

Future:

2012 tool goals:

  • Field testing, more photos of this being built/tested
  • more public events to build/test this tool
  • identify ways to test this without a gas well - like with compost or poop
  • better identify specific sites where it could be useful, or it could be tested. exact locations, like “Rick’s backyard” or “my faucet”
  • once data is captured and documented with the prototype, starting to think about how that information can be presented/analyzed, incorporated into effecting change -- how do you act on it? storyboards...
  • consolidation of build instructions and price lists

Overall: looks good, could use a bit of work on organizing the research for newcomers, ready for fieldwork and testing in public events.