Immersion alarm for pool

[Gemonimo]

With all the different makes and models available, what are the criteria for choosing an effective immersion alarm? Does anyone have any recommendations?  Or perhaps more importantly, advice about what NOT to buy.  

[Théière]

The norms for pool alarms is NF P90-307/A1

Personally I wouldn't by one of MG internationals 4 out of four failed after two years (guarantee period) and the replacement they eventually sent was dead on arrival, gave them up.

Fitted Oceaprotect, that is still working 2nd season, although the battery pack is expensive for what it is (working on a replacement). The battery pack has not failed yet. It also at extra cost can use a wrist band for children that sounds immediately upon immersion (no delay) 

[Gemonimo]

Thanks, Théière, I'll make a note of the names.  Am I correct in thinking that the more I pay, the better the quality? 

[Théière]

I found the prices varied tremedously for the same alarm so I really have no idea but good luck and let us now how you get on. One piece of advice, send off the registration form so you have a guarantee. The Oceaprotect had a very short time to do this and required proof with the shop receipt, so keep copies.