Product review (5 stars): Great Customer Service; Easy to Use PH Meter
I like this PH meter much better than the one I bought for $3 less. This came with clearly written detailed instructions. I had a few questions regarding calibration that Brandy, customer service rep, answered well and promptly. I did something wrong to get the meter stuck on 7.0. She advised me to take the battery out and start over. Now I understand how to calibrate and the pen is working well for my needs.