TEMPERATURE GAUGE Russian patent published in 1995 - IPC

FIELD: measuring equipment. SUBSTANCE: gauge has two identical rows of arc-like fibre light guides, the length of the fibre arc being at least half length of circumference, secured to the mandrels, and arranged over the spiral. The inlet fibre wave-guide of each row is connected with a directed branch pipe. The outlet wave guides are connected with separate photodetector, the outlets of which are connected with the differential amplifier. The gauge improves accuracy of measurements by 2-8 times and widens a measuring range by 1.5-2 times owing to matching of sensitive characteristics of two the same rows of arc-like fibre light guides. EFFECT: enhanced reliability. 2 dwg