Endress+Hauser CPA510-0210 | pH Buffer Solution 4.01, 250 mL

Endress+Hauser CPA510-0210 pH buffer calibration solution. pH 4.01 (NIST traceable), 250 mL plastic bottle, for pH electrode calibration and verification.

Product Overview

The Endress+Hauser CPA510-0210​ is a certified pH buffer solution​ used for the calibration and verification​ of pH measuring systems (glass electrodes and combined pH sensors). It has a nominal value of pH 4.01 at 25 °C​ (NIST/DIN 19266 traceable) and is supplied in a 250 mL polyethylene bottle​ with a tamper-evident seal. This buffer is part of the standard maintenance consumables for Endress+Hauser pH sensors (e.g., CPS11D, CPF81D series) and third-party electrodes.

Technical Specifications (Chemical & Packaging)

Technical Specifications (Application & Compliance)

Key Features

• NIST Traceable Accuracy:​ Each batch is certified against primary standards, ensuring reliable slope determination during pH sensor calibration.

• Ready-to-Use:​ No dilution required — pour directly into a calibration cup for quick on-site or lab verification.

• Long Shelf Life:​ Stable formulation with  agents to minimize fungal growth in the bottle.

• System Compatibility:​ Recommended for use with Endress+Hauser Liquiline transmitters and Memosens pH sensors to maintain measurement traceability.

Applications

• pH Sensor Calibration:​ Single-point or multi-point calibration of industrial pH electrodes in water & wastewater plants.

• Field Verification:​ On-site checking of sensor response before critical process measurements.

• Lab & QC Use:​ Verification of reference pH meters and lab glass electrodes in quality control labs.

Also available: CPA510-0211 (pH 7.00), CPA510-0212 (pH 9.21) for 2-point or 3-point calibration routines.