Hanna Refillable pH Electrode with Calomel References and BNC Connector - HI1144B

Hanna HI1144B Refillable Glass pH Electrode is a high-performance sensor specifically engineered for precise and stable pH measurement in professional laboratory, industrial, and environmental applications. Designed with a durable glass body and a single junction system, this electrode incorporates a calomel (Hg/Hg₂Cl₂) reference, making it ideal for applications where silver interference must be avoided, such as measurements involving Tris buffer and other sensitive chemical solutions.

The electrode features a spheric high-temperature glass bulb that ensures accurate and consistent readings across a broad pH range of 0 to 14 and a temperature range of 0 to 60°C. Its optimized design provides excellent responsiveness and stability, even in demanding testing conditions. The single ceramic junction enables a steady and reliable electrolyte flow rate of 15–20 µL/h, ensuring consistent reference potential and minimizing contamination risks during prolonged use.

Built for compatibility and ease of use, the HI1144B comes equipped with a 1 m coaxial cable and a universal BNC connector, allowing seamless integration with most standard laboratory pH meters and analytical instruments. The electrode’s dimensions, including a 120 mm body length, 175.5 mm overall length, and 12 mm diameter, make it suitable for standard laboratory setups and sample containers.

The refillable design allows the use of 3.5M KCl electrolyte, extending the electrode’s operational life while maintaining measurement accuracy. The spherical tip with a 9.5 mm diameter ensures optimal contact with the sample, improving measurement precision and ease of cleaning. With a maximum pressure tolerance of 0.1 bar, this electrode is suitable for a wide range of laboratory and environmental testing conditions.

Ideal for use in chemical laboratories, water analysis, environmental monitoring, biotechnology research, and quality control applications, the Hanna HI1144B pH electrode is particularly recommended for Tris buffer and other critical assays where Ag/AgCl reference systems may interfere. With its advanced design, reliable performance, and specialized reference system, it offers a dependable solution for accurate pH electrodes measurement in demanding analytical environments.