APERA INSTRUMENTS AI209 Value Series PH20 Waterproof pH Tester Kit, ±0.1 pH Accuracy

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Easy auto. calibration with buffer recognition; auto. temp. compensation (ATC) ensures accuracy in various temperatures (32 to 122F)
Backed by Apera quality pH sensor with low impedance, ensuring high response rate
Comes in a rugged carrying case with pH 4&7 buffers and a lanyard
Auto recognition of stable values improves consistency, so you don’t have to guess when to manually hold measurement
Up to 2000 hours’ continuous operation, powered by AAA batteries