Measuring water temperature

Hi All,

I'm hoping you can help with some advice.

At the bottom of my garden is a River and I'd really like to be able to monitor the water temperature and data log some results if possible.

I have a small dock on the River and would mount the equipment there, it's no more than 25m/80ft to the house and is a fairly direct line of sight although the river is lower down so there is a bit of a slope.

I didn't want to spend too much but I'd really like to find one that transmits data wirelessly such as the attached below.

http://www.weathershop.co.uk/shop/technoli...ata-logger.html

Does anyone have any experience of this device or the wider question was do any of you have any recommendations for a simple water temp. monitor that is wireless and preferably has data logging?

Many thanks,

S.