LabSen® 251 Spear pH Electrode for Semi-Solid Materials

The LabSen® 251 pH electrode from Apera Instruments is specifically designed for accurate pH measurement in soft and semi-solid samples, including cheese, butter, dough, fruit, and general liquid samples. Manufactured with Swiss sensor technology, this electrode features a rugged pointed glass diaphragm, a long-life reference system, and a maintenance-free polymer electrolyte for durability and precision.

Key Features

• LabSen S-Type Pointed Glass Diaphragm – Low-resistance, highly durable glass tip ensures quick stabilization in 15-30 seconds, making it 10 times more robust than conventional electrodes.
• Polymer Electrolyte with Hole Diaphragm – Prevents clogging and allows direct sample contact for reliable readings. No electrolyte refilling required.
• Long-Life Reference System – Features a glass tube, AgCl, and a reference silver wire, improving electrode stability and lifespan. A cotton-filled glass tube prevents unwanted reactions between AgCl and the electrolyte due to temperature changes.
• Blue Gel Electrolyte – Non-flowing, prevents air bubbles, and ensures consistent, accurate pH measurements.
• Impact-Resistant Design – The robust construction prevents electrode rupture during normal use, even when penetrating semi-solid samples.
• Broad Compatibility – Equipped with a BNC connector, making it compatible with all pH meters that use BNC connectors, including:
• Apera Instruments PH850, PC850, PH8500, PC8500, PH700, PH910, PC910, PH950, PC950, PH800, PC800, PH820, and PC820.

Compatibility

• Temperature Compensation: Requires a separate temperature sensor (e.g., Apera Instruments MP500) for automatic temperature compensation, or temperature must be entered manually.

Warranty

• 6-Month Manufacturer's Warranty ensuring reliable performance for semi-solid and soft material applications.