An apparatus for and method of encapsulating Ethernet frame data in Very high speed Digital Subscriber Line frames. The catalyst is made by sulfiding a catalyst precursor containing 5-95 wt. A control circuit changes its operating state according to the level of the temperature detecting signal. The adjustment of the length of one of the ring segment’s results in an adjustment of at least one angle between at least one set of other ring segments, thereby causing an adjustment to the geometric characteristics of the ring. By comparing the signals received with a known standard for that type valve, proper operation, or lack thereof, of the valve under test can be determined. A result of comparison between the bias signal and the output signal is outputted from the comparator as an output signal.