General Purpose Glass Formulation

General purpose (GP) glass provides a versatile and reliable sensing membrane ideal for routine pH measurement across a broad range of applications. Exhibiting approximately 100 megaohms resistance at 25°C, it performs optimally at ambient conditions. The HI1048B effectively measures samples with temperatures ranging from -5 to 60°C (23 to 140°F), covering typical wine and juice processing environments.

Spherical Glass Tip

The spherical bulb design maximizes surface contact with the sample, enabling faster electrode response and superior stability—critical advantages when monitoring pH in wine must and fruit juices where rapid, accurate readings support quality control decisions.

CPS™ Sleeve Junction

Clogging Prevention System (CPS™) represents a breakthrough for pH electrodes used in high-solids samples. By pairing ground glass porosity with a PTFE sleeve, it maintains consistent electrolyte flow while repelling particulates and debris. This innovative junction design allows the HI1048B to resist fouling up to 20 times longer than conventional ceramic junctions, dramatically reducing maintenance and extending operational life in challenging wine and juice matrices.

Double Junction Reference

The double junction construction features an internal compartment that isolates the Ag/AgCl reference wire, preventing silver ion migration into the sample. This proves essential in applications containing sulfides or where silver precipitation could otherwise block the junction, ensuring stable, drift-free pH readings over extended use.

Refillable Design

As a refillable double junction pH electrode, the HI1048B utilizes silver-free HI7082 3.5M KCl electrolyte. Users can easily replenish or replace the fill solution if contamination occurs, providing flexibility and prolonged service life across multiple testing cycles.

Glass Body Construction

The robust glass body resists aggressive chemicals, facilitates easy cleaning, and enables rapid thermal equilibration with the internal reference electrolyte. Faster temperature stabilization translates to more consistent reference potential and dependable pH measurements in varying lab conditions.

BNC Connector

Equipped with a universal BNC connector, the HI1048B connects seamlessly to any pH meter with a female BNC input, eliminating the need for proprietary adapters and ensuring broad compatibility across instrumentation brands.

Single Junction Versus Double Junction pH Electrodes

Traditional single junction electrodes have only one barrier between the internal reference wire and external sample. Under challenging conditions—high pressure, extreme temperatures, strongly acidic or alkaline solutions—the electrolyte flow can reverse, allowing sample ingress that contaminates the reference and leads to complete failure.

Silver chloride precipitation poses another common issue, particularly in samples containing Tris buffers or heavy metals. When AgCl forms on the junction face, it causes blocked flow and erratic, drifting readings.

Hanna’s double junction system adds an intermediate compartment that physically separates the reference from potential contaminants. The silver-free outer electrolyte eliminates precipitate formation, significantly reducing clogging risk and delivering far more reliable, stable performance—even in the most demanding wine, juice, and high-solids applications.