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#104026 - 12/29/07 03:08 PM Water Temp Depth Sensor
Bill Cody Offline
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Registered: 04/18/02
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Loc: Northwest Ohio - Malinta OH
Often it is beneficial to know the water temperature at various depths in your pond. A few reasons to know these temperatures will allow you to:
1. find a thermocline, (cooler water layer)
2. determine if your pond needs an aerator due to formation of thermal layers that do not mix in summer,
3. determine how well your aerator is mixing or turning over the pond, (top to bottom temps will be more uniform the better the mixing); remote areas may not be getting well mixed.
4. determine if you can run your aerator less time and still have adequate water mixing each day,
5. locate deeper areas where spring water might be flowing into the pond,
6. measure deeper water temperatues during winter or ice cover to see if there is any supercooling (below 39F).
7. detect any warmer water zones near bottom in winter
8. find the preferred temperature of fish in deeper water

Sub-surface water temperatures can be measured with relatively low cost electronic temperature sensors that have a probe attached with a wire to the battery powered hand held unit. Now until March 31 2008, Cabelas has the following Minn Kota temperature sensor on 50% off sale for $9.99 (orig price 19.99). If you have one of these units you may want to buy a second one as back-up, replacement, or a gift. I think these discounted units are close-outs and are being replaced by a newer $20.00 version that can be seen in this link.

http://www.cabelas.com/cabelas/en/templa...requestid=57747


Sale priced unit below has a 20 ft probe cable and operates with a AAA 1.5 Volt battery. Sale in Cabelas Sale Catalog ends on March 31,2008. Sale items have limited supply. If you want to order, Sale Catalog ITEM NUMBER IS: NJ-01-3663. Catalog code number is NJ-160A. Cabelas toll free phone is 1-800-237-4444.

In the photo I have a copy of the catalog ad plus my Temp Sensor that I've had several years. I attached a lead weight to the probe end to quickly make the probe sink. I marked the sensor's wire with colored tape to identify specific depth increments. I use a piece of foam as a base to hold the unit and to wrap-up the wire to keep it more organized.




Edited by Bill Cody (12/29/07 06:26 PM)
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#104034 - 12/29/07 05:17 PM Re: Water Temp Depth Sensor [Re: Bill Cody]
RobA Offline
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Registered: 04/28/04
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Loc: SE Pennsylvania
Thanks. I got a Cabelas gift certificate for Christmas. Just placed an order which included a sensor.

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#112026 - 03/19/08 01:59 PM Re: Water Temp Depth Sensor [Re: Bill Cody]
mikeinsac Offline
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Registered: 03/19/08
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Loc: Elk Grove, CA
The Water Temp Sensor mentioned at Cabelas is now $7.99. The trick is to use just the numeric portion of the item description in their search feature and it will pull up the most current price. The prefix is now 'OJ' i/o 'NJ', but might change again by the time someone else here buys it.

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#146828 - 01/28/09 07:57 PM Re: Water Temp Depth Sensor [Re: mikeinsac]
CJBS2003 Offline
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I just found this post... A little late I know, but! I own one of these. http://www.cabelas.com/cabelas/en/templa...0003&hasJS=true Not sure how accurate the DO meter is on it, but the temp meter is very accurate and seems to register quickly. Knowing the temp and DO can really be valuable and interesting!
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#146829 - 01/28/09 07:58 PM Re: Water Temp Depth Sensor [Re: CJBS2003]
CJBS2003 Offline
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Plus it has a 50 ft cord, so you can get as deep as one could possibly need to in any reasonably sized pond.
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#146906 - 01/29/09 10:07 AM Re: Water Temp Depth Sensor [Re: CJBS2003]
jeffhasapond Offline
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First off thank you Bill Cody for posting that info.

Could one of the pro's discuss the device that CJBS2003 posted a link to? Is the DO sensor accurate? I have been looking at similar devices for measuring o2 and they get crazy expensive. Is the one linked above reasonably accurate? Good enough for an amature?

Any and all thoughts are appreciated. Thanks for posting that link CJ.
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"My mind is a raging torrent, flooded with rivulets of thought cascading into a waterfall of creative alternatives."
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#146915 - 01/29/09 10:39 AM Re: Water Temp Depth Sensor [Re: jeffhasapond]
CJBS2003 Offline
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I have had the device for a couple years now. Mine has held up pretty well. I attached a 16 oz lead weight to it and it takes the probe down fast and keeps it down.

I also use it to measure the temp and DO of the big hole in the creek behind our hunting cabin(trying to see if trout with hold over in it during the summer). The readings I get both temp and DO wise seem to be reasonable.

It is excellent for finding the thermocline in lakes that I fish. Makes trolling for trout a lot easier. But I really don't know how accurate the DO sensor is on it. The temp sensor from what I can tell is extremely accurate.
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Men and fish are alike. They both get into trouble when they open their mouths.

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#147008 - 01/29/09 05:09 PM Re: Water Temp Depth Sensor [Re: CJBS2003]
Chris Steelman Offline

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Registered: 02/26/06
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Loc: Red River County,Tx
Can you calibrate the oxygen sensor and change the elevation?

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#147084 - 01/30/09 12:19 AM Re: Water Temp Depth Sensor [Re: Chris Steelman]
CJBS2003 Offline
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Yes, there is a mode where you can change the elevation on the unit. It goes by 1000's feet...
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Men and fish are alike. They both get into trouble when they open their mouths.

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#147571 - 02/03/09 04:40 AM Re: Water Temp Depth Sensor [Re: CJBS2003]
CJBS2003 Offline
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No one with prior experience with a device similar to the one I posted?
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Men and fish are alike. They both get into trouble when they open their mouths.

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#147597 - 02/03/09 09:07 AM Re: Water Temp Depth Sensor [Re: CJBS2003]
jeffhasapond Offline
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I've been patiently waiting for an expert to discuss this device as well. If you read the reviews of it they are not very positive.

I would like to see a shoot-out test of this device against a professional quality O2 meter.

I wish someone would invent a reasonably priced do all water quality testing device. Theo stop messing with rockets and such and get busy designing something, give the plans to Dwight - he can build anything, then have TomG fine tune it. Get busy people, you've got work to do. Don't make me walk around with my management clipboard.
_________________________
JHAP
~~~~~~~~~~

"My mind is a raging torrent, flooded with rivulets of thought cascading into a waterfall of creative alternatives."
...Hedley Lamarr (that's Hedley not Hedy)

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#147617 - 02/03/09 11:03 AM Re: Water Temp Depth Sensor [Re: jeffhasapond]
Theo Gallus Offline
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 Originally Posted By: jeffhasapond
I wish someone would invent a reasonably priced do all water quality testing device. Theo stop messing with rockets and such and get busy designing something, give the plans to Dwight - he can build anything, then have TomG fine tune it. Get busy people, you've got work to do. Don't make me walk around with my management clipboard.

I just use canaries.
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#147706 - 02/04/09 04:14 AM Re: Water Temp Depth Sensor [Re: Theo Gallus]
CJBS2003 Offline
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Yeah, I still bought the thing even though it had some bad reviews. I have had very good luck with it and this will be going on my third year of use with it...

I know the temperature gauge works on it as it compares well with my other thermometers. The big question is if the DO meter is accurate. It sure is fun to go to local ponds and lakes and drop the probe to the bottom and test the clarity, temp and DO at different levels. It has really helped me with the fishing.
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Men and fish are alike. They both get into trouble when they open their mouths.

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#147741 - 02/04/09 09:51 AM Re: Water Temp Depth Sensor [Re: CJBS2003]
adirondack pond Offline
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Registered: 08/31/07
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CJ, have you tried taking readings with the O2 meter, then use a chemical test for O2? If the meter is close it sure would be a great tool and save alot of time.
The price is very reasonable, maybe that should be my next purchase.
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#147827 - 02/04/09 09:36 PM Re: Water Temp Depth Sensor [Re: adirondack pond]
CJBS2003 Offline
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I haven't but something I should look into. If they are close or at least consistent, it would be nice. When the ice breaks I'll have to give it a try...
_________________________
Men and fish are alike. They both get into trouble when they open their mouths.

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#147871 - 02/05/09 10:13 AM Re: Water Temp Depth Sensor [Re: CJBS2003]
jeffhasapond Offline
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Registered: 07/28/06
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The ProCatch Plus Oxygen and Temperature Meter listed on that Cabellas link does seem to be a very good value at 79 bucks. My concern is that the O2 meter might be way off. I picked up a catalog from Aquatic Eco Systems at the last PB conference and they O2 meters start at over $200 and go up from there. They can be calibrated for elevation and have replaceable membranes - and don't ask me why because I have no idea. All I know is that I would like a reasonably priced and accurate O2 meter.

It seems to me like a test of the above O2 meter would make for a good PB article.

Oh and by the way I am in no way slighting or being critical of Aquatic Eco Systems. I haven't ordered anything from them yet but their catalog is fantastic and it seems as though they carry top notch stuff.
_________________________
JHAP
~~~~~~~~~~

"My mind is a raging torrent, flooded with rivulets of thought cascading into a waterfall of creative alternatives."
...Hedley Lamarr (that's Hedley not Hedy)

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#147879 - 02/05/09 10:53 AM Re: Water Temp Depth Sensor [Re: Bill Cody]
RobA Offline
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Registered: 04/28/04
Posts: 705
Loc: SE Pennsylvania
Years ago I bought a temperature/visibility probe to use for bass fishing. I recall it had some type of dissolved oxygen readout on it. However, the probe was completely encased and didn't actually sample the water. It based its DO reading on assumptions (temperature, barometric pressure, etc) and didn't actually test the water for DO. I'm pretty sure the model I bought was similar to this one.

Keep in mind this was more than 15 years ago and my mind ain't as sharp as it used to be.... not that it was sharp then.

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#147883 - 02/05/09 11:06 AM Re: Water Temp Depth Sensor [Re: RobA]
jeffhasapond Offline
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Registered: 07/28/06
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I'm thinking the same thing Rob, that the meter above extrapolates the O2 reading and doesn't actually measure it.

See how I used a four syllable word there? Ha, and they said I would never amount to anything!
_________________________
JHAP
~~~~~~~~~~

"My mind is a raging torrent, flooded with rivulets of thought cascading into a waterfall of creative alternatives."
...Hedley Lamarr (that's Hedley not Hedy)

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#147888 - 02/05/09 11:34 AM Re: Water Temp Depth Sensor [Re: jeffhasapond]
Chris Steelman Offline

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Registered: 02/26/06
Posts: 1840
Loc: Red River County,Tx
JHAP, buy one and then send it to me so I can test it.

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#147900 - 02/05/09 12:23 PM Re: Water Temp Depth Sensor [Re: Chris Steelman]
adirondack pond Offline
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Registered: 08/31/07
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I agree, a test and comparison of low cost O2 meters that actually work would be much appreciated. Maybe there is no such thing.
I'm nonplussed. (how's that word JHAP)
The boss won't approve taking out a loan for one.


Edited by adirondack pond (02/05/09 12:30 PM)
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#147908 - 02/05/09 12:57 PM Re: Water Temp Depth Sensor [Re: adirondack pond]
CJBS2003 Offline
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Registered: 01/19/09
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Loc: northern VA
Looks like a test would have to be done to see just how accurate this guesstimation is...
_________________________
Men and fish are alike. They both get into trouble when they open their mouths.

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