Single-sensor fiber-film probes

Fiber-film probes have cylindrical thin film sensors and may be used as a substitute for wire probes in liquid or gas applications where more robust probes are needed. Fiber sensors are 70 µm diameter quartz fibers, 3 mm long, covered by a nickel thin film approx. 0.1 µm in thickness. The ends are copper- and gold-plated. The fiber is soldered onto the prong ends. Fiber probes are available in five different prong configurations, with either a thin coating or a heavy coating for use in gases and conducting liquids, respectively. The picture to the right shows the probe dimensions common for single-sensor fiber probes.