| Author | Comment | Last activity | Moderation | ||
|---|---|---|---|---|---|
| Ag8n | "Amazon lists a microprocessor based circuit for about $46. That does not include the probe, case, or many other requirements. But it is a start. ..." | Read more » | over 6 years ago | |||
| Ag8n | "Go to: https://github.com/jboone/tpms It gives a working system with links to a hak5 video etc. It doesn't count cars, but... " | Read more » | over 6 years ago | |||
| Ag8n | "Ok. Let's go through it step by step. First, after a little digging, it looks like there are two frequencies used 315 mh z and 433 mhz. So it woul..." | Read more » | over 6 years ago | |||
| Ag8n | "You might look into TPMS ( short for tire pressue monitoring system) by j. Boone. Its freeware that runs on linux. The hardware is a rtlsdr ( it ..." | Read more » | over 6 years ago | |||
| Ag8n | "If you are trying a direct comparison ( apples to apples), see how the analytical lab is testing your samples. Probably, they will be using an adv..." | Read more » | over 6 years ago | |||
| Ag8n | "A couple of gottchas here. I think you want to use the lego spectrometer with a light source. The light source would be fed through a cuvette fil..." | Read more » | over 6 years ago | |||
| Ag8n | "The public lab instrument will cover a part of the NIR. Unless you can find very cheap used FTIR, the cost of the instrument will far exceed your ..." | Read more » | over 6 years ago | |||
| Ag8n | "I have very little experience with soil testing. So the local extension agent was called. He suggested the lamotte NPK test kits. One that will ..." | Read more » | over 6 years ago | |||
| Ag8n | "What kind of chemicals are you planning on being able to handle? Please use caution. My best advice in many cases is to get the heck out of there...." | Read more » | over 6 years ago | |||
| Ag8n | "Most spectra mismatches occur because of the light source. So, say you are trying to get the spectra of holmium oxide glass ( a common standard). ..." | Read more » | over 6 years ago | |||
| Ag8n | "We always contacted the state EPA. " | Read more » | over 6 years ago | |||
| Ag8n | "You might be surprised at what goes into storm sewers. The plant I worked at had a "branch" of about 40 people. Anyway, because of its small size..." | Read more » | over 6 years ago | |||
| Ag8n | "Try: Https://m.youtube.com/watch?v=elZlWSj7jlg The company is LLA out of Germany. They say the particles can go down to 3 mm in size. Looks lik..." | Read more » | over 6 years ago | |||
| Ag8n | "I checked youtube. There are videos of cameras separating all kinds of plastics with NIR. That is PE , PS, PVC, and a bunch of others. So the ap..." | Read more » | over 6 years ago | |||
| Ag8n | "Thank you for the help programmer 1200! " | Read more » | over 6 years ago | |||
| Ag8n | "Anything to help. Those wavelengths are common in HPLC work. Before the new instruments, for uv/vis detectors, they would take a mercury lamp and..." | Read more » | over 6 years ago | |||
| Ag8n | "The typical light sources used for commercial UV spectrophotometers are deuterium lamps. These light sources easily cover 190 nm to 400 nm. They ..." | Read more » | over 6 years ago | |||
| Ag8n | "I think the concern should be with detecting radium, since all isotopes are radioactive. The best way to detect radium is with energy dispersive X..." | Read more » | over 6 years ago | |||
| Ag8n | "I worked with medical devices, which is different from the microplastics you are after. For example, if we had plastics in a liquid, I would take ..." | Read more » | over 6 years ago | |||
| Ag8n | "That is dehydrohalogenation. " | Read more » | over 6 years ago | |||
| Ag8n | "The process that polyvinyl chloride ( PVC) degrades by is hehydrohalogenation. First, one double bond is formed, then a second conjugated with the..." | Read more » | over 6 years ago | |||
| Ag8n | "I can help with analyzing microscopic plastic particles, but not microplastics. Let's start with most expensive and go to least expensive. For R&a..." | Read more » | over 6 years ago | |||
| Ag8n | "The instruments to do The testing you want are complicated. It's not that the spectrometer couldn't be used, but it would take a lot of work. Her..." | Read more » | over 6 years ago | |||
| Ag8n | "Well, exactly what approach are you thinking of? Let's see if the already tried can be eliminated and maybe make it easier to make progress. " | Read more » | over 6 years ago |