Sensor Technology Accessories All sensors require consumables such as buffer and cleaning solutions to keep them functioning reliably. Membrane Cap for Amperometric Sensor: RS 0531305 • Membrane caps for types: CLE 2.2, CLE 3, CDE 1.2, CDE 2, OZE 2 and OZE 3. Signal Lead for pH/ORP Measurement: RS 0531371 • Coaxial cable Ø 5 mm, 5.0 m - SS • Pre-assembled to facilitate installation • Factory tested to ensure function reliability • IP65