Search for "cole parmer" on ebay. try and snag a used one. Cole Parmer makes labratory grade equipment. You can pick up a brobe in the thirty to fifty dollar range. If you wait a while you may be able to pick up a probe and controller (to turn something on or off via a plug ) for under a hundred.
go to coleparmer.com and search 5652-00 and you'll see what I mean.
wouldnt you agree its the "standard" just beacuse its been around the longest? Hanna produces Lab Quality instruments, If its good enough for a lab, its good enough for me. Not saying anything bad about pinpoint, just that it may not be the best available..
<a href=showthread.php?s=&postid=8135759#post8135759 target=_blank>Originally posted</a> by MinibowMatt I use this Hanna Meter It works awesome, was cheaper than a pinpoint and Hanna has excellent customer service. Plus it measures temp and compensates for it, pinpoint doesnt do that.
If your pH meter is calibrated at room temperature (or your calibration fluids are at your reef tank temperature), then I don't see the advantage (especially if it's a two point calibration). Since the temperature is the same, no compensation would be needed.