Relatively inexpensive, transportable and deployable sensors are produced all over the world for a variety of analytes. Broadly defined, sensors respond to a physical or chemical property, providing an interpretable output. For our purposes, a main distinction of a sensor versus a sampler is that sensors do not require laboratory-based analyses, and provide outputs in near-real time. Though we often think of sensors as part of the electronics field, plenty of analog sensors have been available for decades. Common analog sensors include things like mercury thermometers and classic barometers. Common digital sensors include things like voltmeters. In Public Lab, we're interested in a broad variety of sensors, both analog and digital, designed for measuring chemical and physical properties in air or water. ###Air Sensors There are a ton of different air sensors on the market these days, with common analytes including carbon monoxide (e.g. smoke detectors), temperature, humidity, particulate matter, and more. Some of these sensors require a digital interface with a controller and data logger, others are analog. Please see more information [here](/wiki/air-sensors) and check out air sensors in the table below. Please add more sensors that you've used! [embed table] ###Water Sensors Water sensors are available for several analytes, such as salinity, pH, and depth. Like air sensors, water sensors may be digital or analog. Any digital water sensors that are meant to be deployed will require water-tight enclosures for the electronic components. Please see more information [here](/wiki/water-sensors), and check out and add more sensors to the table below. [embed table]...

Author Comment Last activity Moderation
lalegitimate "Are you looking for Finance? Are you looking for fast cash to enlarge your business Interested people should please contact us reply to us (Whats ..." | Read more » over 2 years ago
PeterBella "@fongvania @stevie Thank you for the EPA Colocation Instruction Guide slide deck. @TravisLondon The info linked above in the slide deck does a grea..." | Read more » over 2 years ago
stevie "Great info! thank you! " | Read more » over 2 years ago
fongvania "From this Guidebook for Developing a Community Air Monitoring Network: If possible, permanently install a community monitor at the colocation site..." | Read more » over 2 years ago
eustatic "I think it all depends on the sampling rate and whether the data converge, ha. For electronic monitors sampling every few seconds, two weeks isn't..." | Read more » over 2 years ago
Ag8n "We were in an medical environment, usually class 100,000. These instruments are different from the ones used by public lab, but based on the same ..." | Read more » over 2 years ago
WendyJospeh "Great project " | Read more » over 3 years ago
mimiss "We could have more than one of those larger LED's that we're currently using, but it might be bulky. One bulb on could be green, two bulbs on could..." | Read more » almost 5 years ago
warren "true! might it be harder to read a bunch of sensors near each other? depends how theyre positioned i guess... " | Read more » almost 5 years ago
mimiss "Moving to something that isn't color based might also help to clear up AQI confusion " | Read more » almost 5 years ago
mimiss "The cost would be a bit more, but what about a small strip of LED lights and the number of lights that turn on correlate to the concentration? Simi..." | Read more » almost 5 years ago
warren "During a quick chat with @mimiss, we discussed how a clicking sound speeding up or slowing down is used by Geiger counters. Using a blinking light ..." | Read more » almost 5 years ago
DitchOntologist "You might find this thread helpful; it lists open-source packages and code for "cleaning" environmental time series data:" | Read more » about 5 years ago
payalrajputescort "Kolkata Escorts Service Innovate Your World By The Way Of Erotic Fun By Adopting Different Style Just Call Us:- +918420755210 For Getting Your Prec..." | Read more » about 5 years ago
saad111 "Thank you because you have been willing to share information with us. we will always appreciate all you have done here because I know you are very ..." | Read more » about 5 years ago
warren " shows an image like this, using a color mapping which is often used in thermal photography: " | Read more » about 5 years ago
Jorgelopez " This looks very interesting though " | Read more » about 5 years ago
barakkasan " Some say "partial color blindness" actually has more color intelligence than normal people you can see here: frontiersin " | Read more » over 5 years ago
liz "Hi @Karik, do you have a link to LabVIEW? " | Read more » almost 6 years ago
cfastie "Kina, thanks for the videos. Very helpful. I might try CoolTerm again, since I was using a sketch that did not format the serial output in an appro..." | Read more » over 6 years ago
kinasmith "Hello again. I just did two quick screen captures explaining how to do this with CoolTerm, using code from this GIST. The First one is here: https:..." | Read more » over 6 years ago
liz "Wow thanks @cfastie!!!!!! This is very useful info. Did you notice about that I mentioned @nshapiro and @zengirl2 don't have the actual HCHO sensor..." | Read more » over 6 years ago
cfastie "I tried CoolTerm and never got it to work. I tried for only a half hour, so my failure is not so surprising. If you have a working data logger (e.g..." | Read more » over 6 years ago
liz "Email me, if u can " | Read more » over 6 years ago