E-201-C-9 Composite pH Electrode with BNC Connector for Laboratory and Aquaculture Use

The E-201-C-9 is a composite pH electrode that combines a pH-sensitive glass membrane and a silver/silver chloride reference electrode in a single polycarbonate body. This pH sensor probe is designed for electronic pH measurement when connected to digital benchtop or portable pH meters equipped with a BNC (Q9) input. The electrode covers a measurement range of 0 to 14 pH, with a zero point of 7 ± 0.5 pH at 25°C and a measurement error of 0.2 pH under the same conditions. Its internal resistance exceeds 250 MΩ, and the response time is less than one second, allowing quick readings in aqueous solutions. The polycarbonate housing is non-refillable and sealed, which reduces maintenance compared with refillable glass electrodes. Operating temperature is specified from 0°C to 60°C, making this BNC pH electrode suitable for laboratory analysis, chemical processing, aquaculture and fish farming, pharmaceutical quality control, and dyeing or textile applications. The 1-meter cable provides flexibility when the meter and sample vessel are separated, and the standard Q9 connector fits a wide range of pH meters that accept BNC probes. Because the electrode is a direct replacement component, users should verify that their meter’s input matches the Q9/BNC format before installation. With its composite construction, sealed body, and broad pH range, the E-201-C-9 pH electrode offers a practical solution for routine pH testing in water, soil extracts, and process solutions.