Review on Sper Scientific 850052 Pen Large by Jose Mcdaniel
Seems to need a recalibration in the middle of mine.
Seems to need a recalibration in the middle of my processes. Also crashes on readings when putting it back into the buffer. My last pH meter was cheaper and I never had this problem. Most likely I will order another device and model.
- Substance Analysis Instruments
- Questionable purchase for the elderly
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