Check-iT TDS Meter

It worked but

The rubber housing tore when I was taking it out of the packaging, so I taped it up with electrical tape and also taped the battery compartment but still got moisture inside the display which made it hard to read. Be careful when you take it out of the package, the rubber housing is not real durable

Super

Very Super TDS Meter

Check it

The battery was a bit hard to locate, they don't carry that size everywhere. It works great.