Putting the standard probes into water does not hurt anything but they will slowly be affected by the water and change their resistance, as a result they start reporting totally incorrect temps.
To get water temps you can either use a purpose built water sensor like the ones from bitspower and Aquacomputer ... Although the AC ones are just the normal probes wrapped around a metal fitting. An easy way to do it is to simply stick a normal flat sensor to the side of a rad. It will give you the same result within about .1 of degree.
As far as sticking them down I doubt it really matters what you use.

I do not know what kind of probes you have, but I would use inline probes (pictures below).
I would set one before the first waterblock (often the CPU block), to measure the cooled water temperature and one after the last waterblock (often the GPU block), to measure the warmest water temperature.

Try here
American site, has pretty much everything you might need including what Pilo suggested, which is also what I use and are very good.

http://www.frozencpu.com/cat/l3/g30/c229…sors-Page1.html

You can tape it to a fitting, the inline probes is nothing else.
Apart from that Amazon Link in PN

If you want to use the in-line sensors, FrozenCPU, linked above by WoodSpoon, has them. I use one of the Phobya In-Line ones. Here is the link to the FrozenCPU page for that sensor: http://www.frozencpu.com/products/13163/…0c229s579#blank

By the way, FrozenCPU has an outstanding reputation. They are my preferred source for anything they carry. If I remember correctly they will ship something light and safe, like the in-line temp probe via the US mail, and the shipping cost should only be around $7, maybe less. It would be a wise idea to buy some other stuff that you need in the same order, because if you don't you will be adding up to a bit more than 50% of the price of the sensor to your order just for shipping. They have sent me some heavier and larger orders for shipping charges of only $7.70 or so, which makes it pay if you have to buy other things too.

If you would rather use one of the temperature sensors that came with the AE 5 LT, then the advice above is good. Just tape it to some, preferably metal, spot or coupler. The in-line sensors have a black plastic ring around them. That ring may act to insulate the sensor element from the ambient air temperature. If you want to achieve the same thing with one of the included sensors, wrap or fit the sensor to the part you want to use, tape it in place, then cover or wrap it with a few to several layers of tape to help insulate. Electrical tape would work well, and comes in a variety of colors that you might be able to use to make it look a bit better in your computer.

Please let us know what you end up doing, it may be helpful to someone wondering the same thing some time in the future.

Zitat von »Jeremy«

It's good to know that any brand with the right connector will work.

That's not entirely correct, the thermal sensor must've a resistance of 10.000 Ohm (10k).