A combination adhesive tape dispenserapplicator for one-handed dispensing of pressure sensitive adhesive tape from a roll and simultaneously applying the tape to a substrate. The transmission power allocation is performed without regard to a state of a changing channel response of the MIMO channel. The battery gauge circuitry also includes a logic device that determines if at least one of the switches is open. In one process, siloxane is oxidized to silicon dioxide in a second microwave reactor and removed with a filter. The device is particularly suitable for testing for mastitis in milking animals. A check valve prevents flow from a fuel system back to the fuel source when the engine is off, so to retain sufficient pressure in the delivery system that the engine will readily start when cranked.