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Jake Lemon replied to the topic Hydros 21 Depth/Conductivity During low temps in the forum Environmental Sensors 9 months, 4 weeks ago
Thanks for your thoughts Neil.
These blips are occurring over the course of hours (roughly 4-6 hours from when depth starts dropping until it reaches it’s lowest point) though the time varies by occurrence.
They seem to be happening as temperature approaches the freezing point. I’ve attached a graph with temp for reference.
AdrienneBP became a registered member 10 months ago
AdrienneBP
@abreefpilz
neilh20 replied to the topic Hydros 21 Depth/Conductivity During low temps in the forum Environmental Sensors 10 months ago
I wonder what the water temperature is, or if there are water temperature changes, when this is happening.
From the graph it reads the water level is at 20″ depth then on the 10th Feb it drops by up to 5″ for some time (hours?) before recovering, with 3 other similar but not us pronounced events
IF any for of ice could build up in a pressure…[Read more]
Jake Lemon started the topic Hydros 21 Depth/Conductivity During low temps in the forum Environmental Sensors 10 months ago
Hi All. We’ve been seeing some strange depth and conductivity trends at a few of our sites. Quick drops in depth over a short period of time with a quick bounceback. See attached screenshot example. This occurred on the same days at multiple sites on different streams, but in the same region. At one site, conductivity dropped a bit at the same…[Read more]
kristenkieta became a registered member 10 months, 1 week ago
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Kurt@UR replied to the topic Inexpensive DO probe recommendations in the forum Environmental Sensors 10 months, 1 week ago
The cathode is exposed. I did rinse the cathode when I cleaned everything and there was nothing obviously fouling it. The probe tip being under the membrane cap I considered pretty well protected. After examining my data and pictures of the probe tip, Atlas Scientific had no explanation other than saying maybe there was an unknown material…[Read more]
BrianJastram replied to the topic Inexpensive DO probe recommendations in the forum Environmental Sensors 10 months, 1 week ago
Hi Kurt,
In regard to downward trending DO readings, contamination, membrane damage, and electrolyte, is there an anode and cathode on your probe that you can clean? I used to use a YSI galvanic DO meter that would accumulate tarnish, which I would occasionally sand off to improve the responsiveness of the readings.
Scott Ensign replied to the topic Not able to download readings in the forum Monitor My Watershed 10 months, 1 week ago
Neil, there is a faster and more flexible way to extract data from Monitor My Watershed. Instead of using the CSV download button, try using either python or R to extract specific time periods of data for specific sensors and stations. Sara has documented these methods here: python version and R version.
Xavier M commented on the post, An Autonomous Lighted Insect Trap to Assess Aquatic Ecosystem Health 10 months, 1 week ago
Dear Mike, congratulation for this nice development! I understand from your description that you focus on adults, but I didn’t clearly understand if the device is set underwater or close to stream to focus insects […]
Xavier M became a registered member 10 months, 1 week ago
Xavier M
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