Hanna (HI7004L) Ph 4.01 Buffer Caliberation Solution; 500mL Sodium Removal3842 Fits all permanent E-Series filter

Fits all permanent E-Series filter heads without adapters or modifications

polyphosphate charge sequesters calcium and magnesium ions to prevent scale buildup in water lines

Replacing Your CK5620 Filter

Commonly used as a post-filter for reverse osmosis systems or as a standalone filter

This dual-media blend provides faster pH correction than calcite alone while maintaining stable long-term performance in standard 10" filter housings

Hanna (HI7004L) Ph 4.01 Buffer Caliberation Solution; 500mL Sodium Removal3842 Fits all permanent E-Series filterHanna Instruments HI7004L pH 4. 01 Calibration Buffer Solution NIST traceable reference standard for accurate pH meter calibration in acidic range applications 500mL Bottle pH 4. 01 0. 01 Certificate of Analysis Temperature Correlated The Hanna HI7004L is a laboratory grade pH 4. 01 buffer solution prepared to precise formulas and standardized against NIST certified meters. Each 500mL bottle includes batch number, expiration date, temperature