I'd bought a pH meter before my hiatus in 2013, but somehow I can't find it now--I think it was some model of Milwaukee though. Assuming a budget of about $100 (though I'd naturally be happy to pay less if extra cost wouldn't buy me anything useful), what would be a good choice in this field? I've seen references to the MW102, it seems available, and within budget (or close enough)--should I even bother looking elsewhere?