Road Salt and the LovoTech network.
- Mark Green and Road Salt
- LoVoTECS
- http://des.nh.gov/organization/divisions/water/wmb/was/salt-reduction-initiative/impacts.htm
- http://www.boston.com/news/local-news/2015/01/16/road-salt-where-does-it-come-from-where-does-it-go
- http://news.nationalgeographic.com/news/2014/02/140212-road-salt-shortages-melting-ice-snow-science/
- http://www.wired.com/2015/03/road-salt-polluting-rivers/
- http://science.howstuffworks.com/nature/climate-weather/atmospheric/road-salt.htm
Salt water intrustion.
https://en.wikipedia.org/wiki/Saltwater_intrusion Groundwater extraction Sea level rise
Agriculture.
http://www.fao.org/docrep/t0667e/t0667e05.htm
Hydraulic Fracturing and pollution.
Fracking http://www.fondriest.com/news/tracking-fracking.htm
Input signal.
- AC measurement
- AC frequency
- Symmetric oscillation
- Low voltage
Probe design.
-
Non-corrosive / interactive
-
Geometry
-
Two probe vs. four probe
-
Mitigating external fields
-
Toroidal probe design
-
https://publiclab.org/notes/bhickman/05-09-2016/conductivity-and-temperature-meter
Temperature compensation.
Commercial standard solutions.
DIY options.
- Saline solution
- Soda
- Salt and distilled water
Ben Gamari.
Ref: RIffle design, which includes conductivity sensor.
Coqui.
Design. https://publiclab.org/wiki/coqui https://publiclab.org/notes/donblair/09-30-2014/coqui-bbv1-0
Problems:
Ben Hickman.
- https://publiclab.org/notes/JSummers/11-21-2013/conductivity-meter
- https://publiclab.org/notes/bhickman/05-09-2016/conductivity-and-temperature-meter
Sparky's Widgets.
- http://hackaday.com/2014/11/10/accurately-measuring-electrical-conductivity/
- https://github.com/SparkysWidgets/MinieCHW
openCTD.
openCTD project https://github.com/OceanographyforEveryone/OpenCTD http://oceanographyforeveryone.com/
Atlas Scientific conductivity circuit
Vintage.
http://www.ullasmann.eu/Doc/Salt_Concentration_Meter.pdf
All research notes tagged 'conductivity':
'Coqui' approach:
- https://publiclab.org/wiki/coqui
- https://publiclab.org/wiki/555-conductivity-meter
- https://publiclab.org/notes/donblair/07-11-2014/simple-555-conductivity-meter
- https://publiclab.org/wiki/coqui-a-simple-water-conductivity-sensor
- https://publiclab.org/notes/donblair/01-07-2016/conductivity-sensing-open-questions
- https://publiclab.org/notes/rebeccah/08-29-2016/riffle-device-water-conductivity-sensor
- https://publiclab.org/notes/donblair/09-30-2014/making-a-diy-conductivity-probe-from-a-water-bottle-and-metal-screws
Jack Summers, Ben Hickman:
- https://publiclab.org/notes/bhickman/05-09-2016/conductivity-and-temperature-meter
- https://publiclab.org/notes/JSummers/11-21-2013/conductivity-meter
Patrick Hixenbaugh:
General:
- https://publiclab.org/notes/markwh/10-29-2014/calibrating-arduino-based-conductivity-meter
- https://publiclab.org/notes/donblair/06-18-2014/using-an-audio-jack-to-assess-conductivity
- http://www2.latech.edu/~dehall/LWTL/ENGR121/notes/3_conductivity_sensor_intro.pdf
- https://www.snowpure.com/docs/FAQ_Conductivity_Thornton.pdf
- Fondriest : http://www.fondriest.com/environmental-measurements/parameters/water-quality/conductivity-salinity-tds/
- http://www.analytical-chemistry.uoc.gr/files/items/6/618/agwgimometria_2.pdf
- http://www.waterboards.ca.gov/water_issues/programs/swamp/docs/cwt/guidance/3130en.pdf
- https://www.pasco.com/support/technical-support/technote/techIDlookup.cfm?TechNoteID=514
- http://www1.udel.edu/pchem/C446/Experiments/exp4.pdf
- http://www.mbhes.com/conductivity_measurement.htm
- Relationship between conductivity and water quality: http://www.lenntech.com/applications/ultrapure/conductivity/water-conductivity.htm