Hanna Instruments pH 4.01 Buffer (20 mL sachet) HI70004 TDS Two-Button OperationOnly two buttons for

Two-Button OperationOnly two buttons for meter operation

it is simple and affordable for a medium household in the modern city

Stability indicator

Hanna’s cleaning solutions eliminate impurities and residues that are left on electrode surfaces when immersed in samples during measurement or when stored incorrectly

Can run without electricity

Hanna Instruments pH 4.01 Buffer (20 mL sachet) HI70004 TDS Two-Button OperationOnly two buttons forHI70004P is a premium quality pH 4. 01 calibration buffer solution. Each sachet has the lot number and expiration date stamped on it and is made of light block foil ensuring freshness each time one is opened. Hannas line of calibration buffers have been specially formulated to have an expiration of 5 years from the date of manufacture for an unopened sachet. The HI70004P is for 25 sachets containing 20 mL of buffer. Accuracy of + 0. 01 pH @ 25C