Hanna Instruments offers a comprehensive range of pH electrodes engineered for specific applications and sample types. Critical design elements include the sensing glass formulation, bulb geometry, body material, junction type, reference configuration, and electrolyte compositionall optimized to deliver accurate and reliable pH measurements.
The HI1048B pH electrode for wine and juice features general purpose (GP) glass, a spherical bulb, durable glass body, innovative CPS sleeve junction, double junction reference, and refillable 3.5M KCl electrolyte. This combination makes it exceptionally suited for measuring pH in high-solids samples such as wine must, fruit juice, suspensions, and other viscous matrices that typically challenge standard electrodes.
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 25C, it performs optimally at ambient conditions. The HI1048B effectively measures samples with temperatures ranging from -5 to 60C (23 to 140F), 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 stabilitycritical 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 conditionshigh pressure, extreme temperatures, strongly acidic or alkaline solutionsthe 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.
Hannas 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 performanceeven in the most demanding wine, juice, and high-solids applications.
