The Hanna Instruments HI 1005 is a flow-through monitoring pH electrode for industrial applications with a double polytetrafluoroethylene (PTFE) junction, a nontoxic polyvinylidene fluoride (PVDF) body with polyetherimide (PEI) protective sleeve, a 1/2" National Pipe Thread Tapered Thread (NPT) external thread for in-line installation, a 3m (9.8') cable, a Deutsches Institut für Normung (DIN) connector, and operates in pressurized systems. A pH electrode is commonly attached to a pH meter to measure the pH of a substance such as water, food, beer, or wine in lab, industrial, and food applications. This electrode has a double PTFE junction which reduces sample solution ingress into the reference compartment for longer electrode life. The polymer reference combined with the annular PTFE junction minimizes clogging. The PVDF body is nontoxic and compatible with food. The PEI protective sleeve provides resistance against mechanical stress. A 1/2" NPT external thread allows in-line installation, and the electrode operates in pressurized systems up to 87 psi (6 bar). A DIN connector provides tight cable connections. The electrode comes with a 3m (9.8') cable.