8172BN pH Electrode
8172BN pH Electrode

The combination of benefits in the 8172BN pH electrode cannot be found in any other pH electrode line. Before you make your next buying decision, consider these advantages:

Faster Response

If you are measuring samples that vary in temperature, or differ in temperature from your calibrating buffers, the 8172BN pH Electrode’s special internal system provides superior measurement stability, faster response, greater accuracy and more reproducible results than conventional electrodes. With 8172BN pH Electrodes you avoid long-term drift or inaccurate readings, even in samples that vary in temperature, while conventional electrodes produce unstable results until they reach thermal equilibrium with the sample.

Sure-Flow® Junction

The unique, free-flowing liquid-to-liquid junction assures you of the most stable, drift-free measurements. The easy-to-clean junction never clogs-simply press the cap and flush the junction area. Release the cap and the junction is reset. Now even the most problematic, dirty or viscous samples can be easily measured without a clogged junction!

No Sample Contamination

Conventional electrodes can leach metal ions into the filling solution and subsequently into the sample. 8172 pH Electrodes do not contain silver or mercury to react with the sample or clog the ceramic frit. Use 8172 pH Electrodes where trace amounts of metal ions, in such samples as biological media, foodstuffs, and pharmaceuticals, cannot be tolerated.

Double Junction Design

This construction allows you more control over an important variable. Use a filling solution that is similar to the sample in order to minimize junction potential problems in high or low pH samples or non-aqueous solutions. Also change the filling solution to minimize contamination when potassium or chloride in the sample is undesirable.

Best for Routine pH

Use 81-72 pH Electrodes as your standard for all routine pH determinations. They will provide accurate, stable, fast, and reproducible results.

For optimum results, all pH electrodes should be regularly calibrated using standard pH buffers.

Technical Specifications

pH Range

Temperature Range

Internal Reference


120 mm x 12 mm

Page reviewed: 18th December 2017