“This appears to be a good product, I bought it on recommendation from the guys who work in the local aquatics store, it is very accurate as it is recalibrated periodically and several liquid sachets are provided to enable this to be done. It also provides a temperature display which is quite useful.
It課ェs not a cheap item but it should be worth it if it provides accurate readings and proves reliable and robust which I can課ェt yet comment on as I have only recently acquired it”