I brewed for the first time in about a year this weekend. My pH meter needed a new probe, so in preparation for the brew I also replaced the probe and opened fresh calibration buffers. Works great again!
I found old calibration buffers in the back of the cabinet. My Amazon history shows I ordered them in 2020, and the bottles show they expired in 2022. After calibrating the meter in new buffers, I tested the old ones to see what being open for years on end past the expiration date did to them.
Answer: not much
the 7.00 buffer read 7.01, and the 4.00 buffer read 3.96.
I'm impressed that they held up so well! (Still going to use my new ones and leave the old ones retired).
I found old calibration buffers in the back of the cabinet. My Amazon history shows I ordered them in 2020, and the bottles show they expired in 2022. After calibrating the meter in new buffers, I tested the old ones to see what being open for years on end past the expiration date did to them.
Answer: not much
the 7.00 buffer read 7.01, and the 4.00 buffer read 3.96.
I'm impressed that they held up so well! (Still going to use my new ones and leave the old ones retired).
