Pinpoint Accessories Calcium Probe
the first one lasted for over two years. can't say a bad thing about it, highly recommended.
October 14, 2012
This is an excellent product
I use this product to test the pH of food products. It works great and measures pH very reliably. A few suggestions: 1) Buy the storage solution, 7.01 solution, and 4.01 testing solutions as well in 250 ml bottles when you purchase this product. Calibrate the machine carefully use it for testing, store it away, and then calibrate it again. It will shift some. Always store the probes in the storage solution, which you can top off with distilled water when it evaporates. The cleaner you keep the probe and the more consistently you place it in the storage solution (assuming you only use it periodically), the longer it will last and the more accurate it will be.
April 3, 2012