An instrument includes a probe providing a single signal path for conveying a signal from a circuit under test to the instrument. The liquid phase reactor contains a solid catalyst suspended in methanol. The first end of the elongated cylinder is configured to receive a drive hub. In some embodiments, the assets are vehicles that are a part of a managed fleet. Prior to introducing liquefied gas into the gas cylinder, a cleaning process is carried out using a two-step baking process to clean the surface of the nickel-phosphorus layer. If one of the interface routers fails, the selection of transmission paths otherwise provided by the failed interface router may be provided by another one of the interface routers.