Sensors
sensors

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
cfastie "That's a nice little I2C hub. Maybe it would be easy to make something like that for DuPont wires from strips of male header: But somebody would..." | Read more » over 7 years ago
xose "Combined with this i2C hub even if not so cheap for it's function = no extra soldering. https://www.seeedstudio.com/Grove-I2C-Hub-p-851.html " | Read more » over 7 years ago
xose "Fantastic @cfastie! This nano shield looks awesome for 4$ ;) https://fair.to/qBz4q " | Read more » over 7 years ago
cfastie "There is a growing list of logger options and specs in a Google sheet. Please add information there if you know other stuff. " | Read more » over 7 years ago
warren "Love this. Thanks, Chris! At some point it'd be awesome to collect all the loggers on a single method page, and look at the pros/cons/prices of ea..." | Read more » over 7 years ago
cfastie "That Openlog is tiny! It combines an Arduino 328p with a microSD card, but still needs an RTC. There are clones of it available for $7.00. I have ..." | Read more » over 7 years ago
xose "Hi there!! So interesting!! At the IMVEC.tech we're using the Openlog, known for it's use as a drone black box combiend with an RTC. Just another ..." | Read more » over 7 years ago
cfastie "Update: The u-blox NEO-7M board can be powered with either 3.3 or 5 volts. The GPS module itself is not tolerant of more than 3.6 v, but the board ..." | Read more » over 7 years ago
cfastie "I guess I demonstrated that the u-blox is protected someway or another from voltage over the stated 3.6v max. I was using four eneloop AAA (4 x 1.2..." | Read more » over 7 years ago
pdhixenbaugh "Hi Chris! That was good luck with the voltage tolerance! Based on what happened, do you think the u-blox is protected against higher voltages by co..." | Read more » over 7 years ago
dusjagr "yip. just discussing on our other mail list of the "Center for Alternative Coconut Research". below the response from Christoph. and yes, sofar we..." | Read more » over 7 years ago
warren "Ah - sampleRate -- 44100 -- is probably hertz, so that's helpful. It's in: https://github.com/ChrisMicro/TinyAudioBoot/blob/master/java_source/wav..." | Read more » over 7 years ago
warren "This is beautiful - it does seem like -- please correct me if i miread -- this is for programming an Attiny, and focuses on Arduino IDE => micro..." | Read more » over 7 years ago
dusjagr "hi webjackologists, i'd like to share our recent developments of another Audio based communication, and especially the bootloader for programming A..." | Read more » over 7 years ago
LauraChipley "Hi, Really interesting work. Any new updates on this project? I'm wondering if there are any DIY UAV / LiDAR options that would be accurate enough ..." | Read more » over 7 years ago
warren "Well, just asking about the positive pin shown on the Fritzing diagram -- 5 volts -- which is not on the diagrams on this page. Thanks! " | Read more » almost 8 years ago
rmeister "Not sure what 5V pin you mean, but yes a 4-pin cable is need to connect to the microphone input of smartphones/mobile devices. " | Read more » almost 8 years ago
warren "Hi, I noted that on the WebJack page, the illustration shows the use of the 5v pin, but here it's not shown. Is it essential? I seem to have been t..." | Read more » almost 8 years ago
DavidMack "neat. maybe put the fan on the charcoal side and blow into the tube so you don't get infiltration from the flap in the middle? The other way I've..." | Read more » almost 8 years ago
xose "First approach. Now we're powering it up using a potentiometer to control the fan revolutions and begin testing. Even though the sensor in the pict..." | Read more » about 8 years ago
liz "This is so neat! " | Read more » about 8 years ago
warren "From my laptop to a neighboring desktop, with the volume turned up. It worked better when I held it up to the microphone a bit. " | Read more » about 8 years ago
warren "OMG that totally worked!!! Over open air too -- no cable! " | Read more » about 8 years ago
warren "Don, could you open a PR of your graph example page so we can include it in the WebJack demos? PUHLEEEEEEZZEEEEEEE?????? " | Read more » about 8 years ago