Author | Comment | Last activity | Moderation | ||
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mathew | "if you're interested, we made Dylos drivers for Open Pipe Kit for the Pi-- its a flexible platform for pushing data to Phant and any other database..." | Read more » | about 9 years ago | |||
mathew | "excellent suggestion, thanks for pulling that up! On a brief review, it confirms our experience that PM10 is probably the smallest size we can rel..." | Read more » | over 9 years ago | |||
mathew | "8.5"x11" PDF of this page for printing: _Deploying_Passive_Particle_Monitors-full.pdf PDF made from the Wiki according to these instructions. " | Read more » | over 9 years ago | |||
mathew | "further followup on analysis of samples. " | Read more » | over 9 years ago | |||
mathew | "read my follow-up on imaging the samples " | Read more » | over 9 years ago | |||
mathew | "forgot to add a link-back here: I made a smaller version of the card on the formaldehyde kit for borrowing: download pdf " | Read more » | over 9 years ago | |||
mathew | "studio shots " | Read more » | over 9 years ago | |||
mathew | "Here are some beauty shots of the next version in black. nothing much has changed except the locations of the buttons and inlets to accommodate a ..." | Read more » | over 9 years ago | |||
mathew | "Real neat! two comments about the setup: the shinyei should have everything but the intake and outlet covered to prevent light leakage. you may w..." | Read more » | over 9 years ago | |||
mathew | "awesome! glad the instructions worked for you! I'm putting 2-meter cords in the newer prototypes. We won't be able to run these on battery power t..." | Read more » | over 9 years ago | |||
mathew | "@DavidMack Now we're talking! I've done this before to measure higher volume airflow, but never thought to add the pop valve. I really like that. ..." | Read more » | over 9 years ago | |||
mathew | "this setup will flow 9 liters in 30 minutes, +/- variation in the tubes. I worked to isolate that variation to the tubes, and @gretchengehrke and ..." | Read more » | over 9 years ago | |||
mathew | "@DavidMack Good catch! My notebook measures test 2 at 38.78, right next to 39.78 for the next test! I edited the note. thanks! You're right abou..." | Read more » | over 9 years ago | |||
mathew | "awesome! " | Read more » | over 9 years ago | |||
mathew | "@nshapiro is right, there is no low cost speciation of dust particles. That is usually done in a mass spectrometer or x-ray diffraction spectromete..." | Read more » | over 9 years ago | |||
mathew | "ran some tests on the different Kitagawa tubes that have been used. I put the end into the drilled-out brass tube I've been using to break them, a..." | Read more » | over 9 years ago | |||
mathew | "I bought and tried a 50ml pipette and made a dropout jar. The jar kind of works-- some condensation still seems to get through, but never bubble..." | Read more » | over 9 years ago | |||
mathew | "Just repeated this test today at 26 degrees, and temperature corrected we got 25ppb. So good news: consistency. Bad news: consistently hazardous c..." | Read more » | over 9 years ago | |||
mathew | "ok, looking at a photographic record of the flow rate between the two rotameter measurements it does seem like the change in flow is noticeable. F..." | Read more » | over 9 years ago | |||
mathew | "@danbeavers I couldn't find that little heart. It may have been lost when the box arrived. @davidmack I ran the VWN rotameter with the valve all t..." | Read more » | over 9 years ago | |||
mathew | "rotameter on the table reading .25L/m rotameter on a block of foam for vibration isolation, reading .3L/m " | Read more » | over 9 years ago | |||
mathew | "hmmm.... the level of the rotameter goes and stays at .3L/m when I hold it down to the table at a level point. the vibration of the pump and level..." | Read more » | over 9 years ago | |||
mathew | "I ran a test in our kit packing area and found 26ppb of formaldehyde. while running the test, a Rotameter from VWR arrived in the mail. I hooked ..." | Read more » | over 9 years ago | |||
mathew | "I ran a formaldehyde test over by our shipping station, now that the flow on our lending kit is calibrated. We got 26ppb, or about 3.5x the chroni..." | Read more » | over 9 years ago |