I've been looking for a decent temp sensor with a long (10' to 20') probe for measure water temp at different levels in the pond this year. But I've just confused myself to the point I'm not sure what I'm even looking at any more.

My plan is to take the kayak out in to the pond once a week or so and measure the temp at different levels to start building a chart for reference.

I had one with a 4 foot probe, but loaned it out and it has never come home. Any suggestions?

The cheap way to do it is to attach small plastic soda bottles to a rope at varying depths beneath a float with a brick on the bottom. Put a regular thermometer in each bottle, fill with water, and re-cap.

I believe the wired indoor/outdoor thermometers have a 10' cable on them.

Or maybe look at a fishing thermometer?

A pool thermometer would work, just pull it up fast to read it.

Never occurred to me to me to look at indoor outdoor thermometers. I got fishing stuck in my head. That should work well enough. Thanks.

I have found a few on amazon and ebay, but here lately been looking more spere testing equipement (dont hold me to the spelling at this moment). They seemed pretty reseaonable, but have no experience with them.

I would just check if the outdoor (electronic) thermometer rig is submersible to the depth you want to go.

I looked at a couple for the mini pond here, and they were not submersible at all, but could get wet with rain and such. Maybe I looked at the wrong ones. Doubt it tho

Look for something like this;
http://www.ebay.com/itm/AcuRite-02042-Di...NYAAOSwdU1W-0a-

Bill,

That looks pretty good for quick checking of temperature on your pond and determining where a thermal cline in lakes 11' or less.

Joshua

Sorry to say, but that is not submersible.

Your guess is as good as mine as to what it will read. Only difference is I never paid for it!

You guys

I use a indoor/outdoor wired probe that I picked up at Lowes for less than $10. I attached a large split shot to the end. Drop it in the water, wait until the temp readout stabilizes, remove from the water. Still working 2 years later. That will read to 10' depth.

Maybe the water resistant part is enough for short duration soakings?

My new Amprobe meter has a type K thermocouple which is quite accurate, but only has about a 2' lead. Need to find a longer one.

Wait a minute, I do have some longer type K, someplace.

This is what I use. It was around 10 bucks

I used to have a temp sensor with a color coded probe line I think I bought from a fishing catalog years ago. It worked quite well.

My D.O. meter also takes temps.

I asked on myfshfinder.com. I'll let you know if I get a good lead.

Thanks for all the help. I love this place even though I rarely post

I'd be skeptical of "computing" oxygen but the temp part might do the job. Someone just posted it on myfishfinder.com.



http://www.amazon.com/Luster-Leaf-PCPS50...mperature+probe

You can't accurately compute actual dissolved oxygen with the above meter shown by CB1 on amazon. All it does is adjust for temperature difference assuming DO saturated water. I have one of those things. Good thing about it is it has a long probe. It does not really measure the DO. Plus you should calibrate it with something that accurately measures the temperature because the one I have is not accurate at various temps.

JKB why isn't that probe water tight? To enhance the water proof nature one could encase it in silicone caulk.

I read the manual
Also highlighted that part for you.



You could probably seal it up tho. Cheap experiment.

Yes good information about water vulnerability of that probe. It wouldn't prevent me from using it. The end of the probe could easily be encased in silicone or epoxy, then one has a water proof end of the probe.

Easiest and cheapest would be to imbed it in epoxy glue.

https://www.youtube.com/watch?v=Y0Wp9CmSKFY.

Put it in a bezel.
https://www.youtube.com/watch?v=Y0Wp9CmSKFY

Polyester casting
https://www.youtube.com/watch?v=Y0Wp9CmSKFY

https://www.youtube.com/watch?v=7Qc1XNDsiG4

How about this for 10 dollars? There is a 1 or 2 minute delay on temp change.

http://www.fish307.com/vexilar-deptherm/

Cody Note: I have one of these and when I checked it with my National Bureau of Standards mercury thermometer, the deptherm was not real accurate. Be sure to calibrate to several temperatures if you get one.

This is what I use off of my dock to record temperature. I have it only down about 3 feet. 61 Degrees today.

http://www.sportsmansguide.com/product/index/minnkota-fishermans-air-amp-water-temp-sensor?a=443770

I bought a hand full of them a year or two ago when BPS was selling them for around $4.00.