Apera Instruments 201T-F pH Electrode is made for general water solutions' pH measurement in scientific research, environmental monitoring, and quality control. The built-in temperature sensor allows automatic temperature compensation. Apera's special lithium glass membrane ensures low impedance and stable potentials, which helps generate quick and stable pH readings. A unique junction composed of ceramic and fiber filament efficiently improves the problem of junction clogging. Detachable sensor shield is built upon the sensitive glass membrane to protect it from accidental damage. It's the replacement pH electrode for Apera PH700, PH800, PC800, PH850, PH8500, PC8500, PC850, SX823-B, MP511. Measurement Range: 0–14 pH, 0–80˚C (32–176˚F); Housing: Polycarbonate; Junction: Single Ceramic; Reference Electrode: Ag/AgCl; Connector: BNC for pH, RCA for temperature; Size: ø12*160 mm; Cable: 3 Ft; Temperature unit: NTC 30KΩ. Not suitable for testing in low-ion concentration solutions (eg: deionized water or distilled water), strong base solutions (pH>12), highly corrosive liquid, or for continuous testing in high temperature solutions (>140˚F). The product is CE and RoHS certified, and is manufactured under an ISO 9001: 2015 certified quality system.