Oakton® pH Calibration Singles

Oakton pH Calibration Singles, pH 4.01, 20 ml Pouches, Box of 20

A convenient, portable, and highly accurate way to calibrate your pH meter wherever you are – just tear open, dip and calibrate! Pouches are air-tight for maximum freshness and unquestionable reliability. All solutions are labeled with Temperature vs. pH reference tables for accurate calibration no matter what the meter’s calibration capabilities are, and they are certified traceable to NIST Standard Reference Materials. Singles are packed 20 pouches to a box.