Jim wrote:Most people that know about these things reckon that pH meters are not worth the bother for homebrewing.
You have to calibrate them every time you use them using standard solutions that you have to buy; the electrodes only last a short time and are expensive; the 'cheap' ones aren't very accurate etc etc.
You shouldn't have to recalibrate every time unless you're trying to achieve unnecessarily high levels of accuracy, and the electrodes should last OK provide you take care of them properly. I forget how long I've had mine, but it's not needed recalibration yet and is still working fine. But it's the
proper Hannah high-accuracy one (about 75 quid from H&G), not some cheapo piece of shit from eBay.
For just looking at the mash pH, the 5.2-6.8 ones should do the job - if you're below 5.2 you're too low anyway. But having both won't hurt... I did manage to pick up some on eBay once that were 4.0 to 7.0, which was ideal, but I've never seen them again.