BluLab pH pen won't calibrate in 4.0 solution

wigsplitta713

wigsplitta713

Well-Known Member
Do you scrub your probe with toothbrush and soap every month? Cause I do every month I'm going to calibrate and brush probe works perfectly fine 15 years going strong have 2 of them.
 
Drop That Sound

Drop That Sound

Well-Known Member
wigsplitta713 said:
Do you scrub your probe with toothbrush and soap every month? Cause I do every month I'm going to calibrate and brush probe works perfectly fine 15 years going strong have 2 of them.
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What about dipping them into one of those small ultrasonic cleaners every once in awhile.. Works with all kinds of glass objects supposedly. Think it would damage the PH probes?

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