| Author | Comment | Last activity | Moderation | ||
|---|---|---|---|---|---|
| mathew | "Our portland office has .026ppm (26ppb) of formaldehyde when measured over by our packing and shipping area. That's over 3 times the chronic dange..." | Read more » | over 9 years ago | |||
| danbeavers | "Another observation: It would be good to have a check list for the measurement. For example: Verify that the humidity is above ?? and below ??..." | Read more » | over 9 years ago | |||
| danbeavers | "@Mathew The following is from a mechanical engineer friend of mine: Assuming you could pull a reasonably good vacuum on the orifice, you could ge..." | Read more » | over 9 years ago | |||
| danbeavers | "Mathew: That sounds like a mechanical engineer (which I am not) question. I SUSPECT that it will be the sum of the restrictions because of the lo..." | Read more » | over 9 years ago | |||
| nshapiro | "Here is a photo of the tip breaker that is on some of the analog pumps. We could also pre-score them in a standardized way to create consistent ope..." | Read more » | over 9 years ago | |||
| mathew | "@Danbeavers what if we put a standardized, small orifice on the broken end of the glass tube that is always smaller than a hole broken into the tub..." | Read more » | over 9 years ago | |||
| danbeavers | "Perhaps @Stevie could order them. " | Read more » | over 9 years ago | |||
| warren | "I'm arriving tomorrow -- if you could order those I'd buy them off of you when I arrive, or we could just order tomorrow night when I get in. I jus..." | Read more » | over 9 years ago | |||
| danbeavers | "The cheapest flow meters in the appropriate range that I could find: $18.90 http://www.ebay.com/itm/0-1-1-5L-Oxygen-Air-Flow-Meter-Gas-Flow-Meter-..." | Read more » | over 9 years ago | |||
| danbeavers | "Mathew: The "super simple" flow meter you linked to is what DavidMack was describing in the first post comment. That is real good to calibrate a ..." | Read more » | over 9 years ago | |||
| warren | "Actually that'd be super great. If they'd arrive before next Thursday, Nick and Mathew, could you send them to Propeller? Propeller c/o Public Lab..." | Read more » | over 9 years ago | |||
| mathew | "I have small plastic valves, had to order 5. I'll send one out. " | Read more » | over 9 years ago | |||
| warren | "Oh I see! I had read it as 2IN. My brains a little slow right now, sorry. I need to be watered. " | Read more » | over 9 years ago | |||
| nshapiro | ".1-1 is correct. I have three right now. i can send you one. but you would need to get the valves. my supplier just ran out. " | Read more » | over 9 years ago | |||
| warren | "1 VWR FLOW METER ACR 2IN.1-1LPM ($74.62 + shipping). Is that supposed to be 1-10 LPM? Thanks! " | Read more » | over 9 years ago | |||
| warren | "Just size, really. I have to order one of these too so I can use it in the video I'm working on. " | Read more » | over 9 years ago | |||
| mathew | "it has to be upright, yes. what other options are you thinking of? " | Read more » | over 9 years ago | |||
| warren | "OK, cool. Are there options for the flow meter Nick's used above, in terms of size, etc? It has to be upright, right? " | Read more » | over 9 years ago | |||
| mathew | "I think for the neck unit-- we need to have a flow meter in the flow. That is a perfect configuration to use in the buy your own kit, whereas we'r..." | Read more » | over 9 years ago | |||
| warren | "Hey @mathew, do you think the goose neck thing I put together is worth pursuing, or is compatible with the box idea you posted? Just want to know h..." | Read more » | over 9 years ago | |||
| mathew | "@danbeavers I am interested in making our data usable in court, but I'm also trying to be budget-sensitive. we're looking to mail these around fro..." | Read more » | over 9 years ago | |||
| nshapiro | "i actually have three of those pumps on my desk. they have a counter up to 10 and a thermal ring (that doesn't appear to work) for temp and a tube ..." | Read more » | over 9 years ago | |||
| danbeavers | "Answering my own question: "The KITAGAWA air sampling pump reproducibly draws 100cc of sample air" So that would be 90 pump cycles thus makiing i..." | Read more » | over 9 years ago | |||
| danbeavers | "Mathew: Perhaps I am not understanding some objectives here. Is the idea to be able to use one of our measurements in court? I doubt that that i..." | Read more » | over 9 years ago |