Combo Salinity/pH/Temp Testers

[Peepers Mom]

Does anybody have any advice and/or experience with combination salinity/pH/temp 'pen' style water tester meters?
I'm looking at them and wonder if they are accurate and/or worth the extra money (for convenience, durability, etc.).
The one I've spotted is: Hanna Instruments HI 98129 and Amazon.com has this one for $128.
I already have the HM Digital TDS & Temp cheapy meter, but I'm giving that one to my parents and was thinking about maybe upgrading for me. I've dunked mine a couple times, and this one is also supposed to be 'waterproof'.

 

[addy1]

i use a Milwaukee pen test meter for ph, so far it is working great. So much easier than ph strips or even the liquid test kit.