LabSen 243-6 Refillable pH/Temp. Electrode for Test Tubes and Small Samples (>0.2mL)

The LabSen 243-6 from Apera Instruments is a high-precision, refillable semi-micro pH/temperature electrode designed for accurate pH measurement in test tubes and small sample volumes greater than 0.2 mL. Featuring Swiss-made sensor technology and a slim cylindrical design, this electrode is ideal for lab environments where small volume and high temperature testing are required.

Key Features

• Low-resistance LabSen semi-micro glass membrane suitable for samples >0.2 mL
• Can measure as little as 60 µL with semi-micro container (sold separately)
• Built-in temperature sensor (30KΩ thermistor) enables automatic temperature compensation
• LabSen S-type membrane with low resistance (
• Operates in high-temperature samples up to 100°C (212°F)
• Long-Life Reference System for improved measurement stability and electrode durability
• Swiss blue gel electrolyte prevents air bubble formation inside the membrane
• Compatible with Apera meters with BNC/RCA connectors including PH910, PH9500, PH850, PC8500, PH820
• Note: May not be compatible with non-Apera meters due to thermistor mismatch

Complete Set Contents

• 1 x LabSen 243-6 Refillable Semi-Micro pH/Temp. Electrode
• User instructions