Quote Originally Posted by disrupt86
the hanna primo is 20 bucks and works great,theres also oakton. ,blue lab industries,milwaukee,hm digital. lots of companies all in all they do the same thing.if u do go with the hanna primo remeber its not water proof.
Are there any good ones in the 30-80$ range? Whats the benefit of waterproof?

Any links would be great.