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moisture
moisture


Author Comment Last activity Moderation
Ag8n "Call them on the phone and talk to their salesman. Talk to tech services of you have to, but sales is usually better. A word of warning, the sale..." | Read more » over 4 years ago
MarcioPamplona "Yes, i'm aware of the technologies. I want to develop a sensor, using NIR spectometry to measure the moisture level and characterize wood chips. L..." | Read more » over 4 years ago
warren "Hi, all - i believe I've fully recovered this post -- apologies for the database problem over the weekend. Please tell me if things aren't working ..." | Read more » over 4 years ago
Ag8n "That's a lot of money. Nir is using overtones of IR bands. So you might be able to get by with something like atr with an IR. Just can't see that..." | Read more » over 4 years ago
JSummers "Hi @MarcioPamplona, Step one is to figure out where the absorbance shows up. By that I mean the wavelength that you need to detect. Googling "woo..." | Read more » over 4 years ago
MadTinker "There are a number of publications in this area because of the increased use of renewables (e.g. wood) for heating and the increased fire danger th..." | Read more » over 4 years ago
cfastie "Wood moisture content is commonly measured at different points in the process of turning trees into finished wood products. Many wood moisture mete..." | Read more » over 4 years ago
Ag8n "Frequently, in agriculture, near infra-red (NIR) is used, often for grain ananysis. One item is moisture. They will change the amount the farmer ..." | Read more » over 4 years ago
warren "Hi, are you interested in using a spectrometer? (Just guessing from tags) I'm not sure about if that's possible, but happy to try to think through ..." | Read more » over 4 years ago
pswigert "Hi! I really enjoyed this thread and seeing everyone's thoughts and responses to the question. @WhiteRabbit , I was wondering if you have any updat..." | Read more » over 7 years ago
WhiteRabbit "I found this: http://www.vernier.com/products/sensors/col-bta/ which is interesting because unlike other low-cost spectrometers/colorimeters its s..." | Read more » about 8 years ago
warren "Wow chris the barcode scanner filter idea is great!!! " | Read more » about 8 years ago
cfastie "The Public Lab desktop spectrometer is quite capable of making a spectral graph of sunlight reflected from grass. The curve will differ from the pr..." | Read more » about 8 years ago
WhiteRabbit "Here's a write-up that I'm finding quite helpful: http://publiclab.org/notes/nedhorning/11-01-2013/why-a-red-filter-should-work-well-for-ndvi Eyeb..." | Read more » about 8 years ago
WhiteRabbit "Sounds like gel filters would be tricky at best, so I guess ixnay to that. How about this one? http://www.ebay.com/itm/Optical-Interference-Filter..." | Read more » about 8 years ago
cfastie "I have not seen a cheap filter like Rosco that is truly a narrow band pass filter. It might be possible to combine filters to get a fairly narrow t..." | Read more » about 8 years ago
WhiteRabbit "Cool! Awesome post. I suppose it's wishful (and probably foolish) thinking, but given the the low price of a filter swatch book and the seemingly..." | Read more » about 8 years ago
cfastie "A filter switcher is a viable solution, especially for small cameras. Cameras as large as Powershots might require a big, precise device in front o..." | Read more » about 8 years ago
WhiteRabbit "Thanks, Chris, for your thoughtful and very informative post. If I'm reading it right, perhaps using two monochrome cameras, each with the appropr..." | Read more » about 8 years ago
cfastie "It should be possible to distinguish between stressed and non-stressed lawn grass using NDVI. I suspect that the $900 FieldScout performs more or l..." | Read more » about 8 years ago
WhiteRabbit "Interestingly enough, I did just now find this $889 turf grass color meter which does, indeed, use NDVI! http://www.specmeters.com/nutrient-manage..." | Read more » about 8 years ago
WhiteRabbit "Thanks for the links. Supposedly grass also changes color as the soil loses moisture (IIRC, it becomes less green and more blueish?), and people c..." | Read more » about 8 years ago
warren "I think a lot of the challenge of using an Infragram camera well is the need for comparison. Comparing an area treated in one way with a "control" ..." | Read more » about 8 years ago