Synaptec’s distributed sensing platform consists of a compact interrogation device that passively and accurately measures values from up to 50 sensors measuring any combination of current, voltage, strain, vibration and temperature, using a single optical fibre over a distance of 100 km. The core components forming each of these sensors are fibre Bragg gratings (FBGs) and multilayer piezoelectric stacks. Both of these are ubiquitous in fields such as instrumentation, medical devices, control systems, and precision engineering, and so have been studied extensively from the reliability standpoint. In this document, the reliability of each component is considered in isolation, followed by preliminary accelerated lifetime testing performed by Synaptec for the core electrical sensing component.