The LabSen® 551 pH electrode from Apera Instruments is designed for direct pH measurement in semi-solid and solid samples, such as soil, fruits, vegetables, and culture media. Built with Swiss sensor technology and a reinforced PVC housing, it ensures high durability and precise readings in challenging environments.

Key Features:

✔ LabSen S-Type Pointed Glass Diaphragm – A rugged, low-resistance pointed glass tip enables fast, stable readings in 15-30 seconds while being 10 times more durable than conventional electrodes.
✔ Polymer Electrolyte with Hole Diaphragm Structure – Ensures direct contact with samples while preventing clogging. No refilling required.
✔ Long-Life Reference System – Uses a glass tube, AgCl, and a reference silver wire for enhanced stability and longer lifespan. A cotton-filled slim glass tube prevents reactions between AgCl and electrolyte during temperature fluctuations.
✔ Blue Gel Electrolyte – Non-flowing design prevents air bubbles, ensuring consistent measurement performance.
✔ Reinforced PVC Housing – Provides stability, dirt resistance, and impact protection, making it ideal for fieldwork.
✔ Swiss Sensor Technology – Ensures high precision and durability for solid sample pH measurements.
✔ 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 soil, fruit, and solid sample pH measurements.