| 摘要 |
<p>The flame detector for use with boiler systems has a radiation sensitive device which responds when energized by incident radiation of the selective frequency bandwidth to produce a signal indicative of the existence of a flame. A light pipe includes a lens system for collecting incident radiation in a selected combustion zone of the flame. A flexible tube couples the radiation sensitive device and the lens system. A fibre optics bundle conveys the collected incident radiation from the lens system to the detector and is of an extruded high purity unclad quartz material.</p> |
