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
rfdave "@carohowe Is Rockville close enough? I'm an experienced EE who would be happy to help build stuff " | Read more » almost 7 years ago
nedhorning "Hi - This recent paper might be helpful: From my experience satellite based surface temperature works best over f..." | Read more » almost 7 years ago
carohowe "Thanks so much @liz @stevie and @bronwen for your input. Liz, I think it's a fantastic idea to use existing data to inform where we'd like to go de..." | Read more » almost 7 years ago
Bronwen "I haven't used this tool myself, but you might find this project about another open source temperature logger interesting: https://www.ncbi.nlm.nih..." | Read more » almost 7 years ago
liz "LB: Hi @carohowe i am wondering if there might be any use to starting with publicly available data on the DC urban heat island before building a lo..." | Read more » almost 7 years ago
stevie "Hi! The I See Change project was in Harlem not DC, but it might be a good example to check out. " | Read more » almost 7 years ago
warren "@stevie was talking about a project with in DC -- Stevie, did you have a link, or am I mixing it up with the project in Harlem? http..." | Read more » almost 7 years ago
warren "Just wanted to note that @cfastie's been working on the #skypod -- which may fit your needs! " | Read more » about 7 years ago
warren "Not to take credit for these answers, but I saw a couple great responses (one from @gretchengehrke, ) from this thread on which you originally aske..." | Read more » almost 8 years ago