Ooooo! my favorite WATER CHEMISTRY TOYS! *thumbsupsmiley*
Do I have experience with pH monitors? Oh boy do I! But not that particular model. I've played with an Orion 180 model before, and I have a pretty cheapy one at the shop I haven't even figured out how to calibrate yet. But if you're really looking for quality electrical pH monitors, try the Fisher Scientific chemical supply website. They sell lots of water chemistry toys and test kits and all sorts of fun stuff. Gonna cost lots though.
Just trying to be helpful.
~~Colesea