HM Digital PH-P4 pH 4.0 Buffer Solution - 20-Pack (20ml each) RO TDS tester delivering water that is measurably

delivering water that is measurably cleaner from the very first pour

battery included

Factory Calibrated: our meters are calibrated with a 342 ppm NaCl solution

the SE300 delivers stable

EC electrode: MA812/2 (included)

HM Digital PH-P4 pH 4.0 Buffer Solution - 20-Pack (20ml each) RO TDS tester delivering water that is measurablyHM Digital PH P4 pH 4. 0 Buffer Solution 20 Pack Ensure accurate pH measurements with the HM Digital PH P4 pH 4. 0 Buffer Solution 20 Pack. This bulk pack of acidic calibration standards is essential for labs, commercial operations, and frequent users who need reliable pH meter calibration at the acidic endpoint. Key Features 20 Pack Value: Twenty 20ml packets for multiple calibrations and long term use pH 4. 0 Acidic Standard: Precise acidic point