GroLine pH 4.01 Buffer Sachets, 20 mL (25 pcs.) 67016 IP67 Waterproof: Fully submersible

IP67 Waterproof: Fully submersible

Fundamental for gently rinsing the electrode between like samples or calibration solutions as well as rinsing off salt deposit buildup

First use: Prime filter by discarding first bottle of water to activate alkalinity enhancement

One press Zero Calibration

GroLine pH 4.01 Buffer Sachets, 20 mL (25 pcs.) 67016 IP67 Waterproof: Fully submersibleHI70004G is a high quality pH 4. 01 calibration buffer designed with hydroponics, aquaponics, and greenhouses in mind. Single use sachets are highly portable, with a small footprint and a lightweight design. They are the perfect accessory for your on the go testing, fitting easily into your pocket or carrying case. Supplied with Certificate of Analysis Single use sachets for convenience. Perfect for use with GroLine testers and portable meters!