The paper presents an approach to the complex measurement of temperatureand mechanical strain for . Using a polyharmonic signal of a given shape allowed two sensors to be simultaneously polled. Temperature and mechanical strain sensors are made in the form of fiber Bragg gratings with special spectral characteristics.

Keywords: Bragg fiber grating, sensor, mechanical strain temperature, construction, photodetector, polyharmonic method, optical fiber, special form of the spectrum, light

The paper presents an approach to the complex measurement of temperature, humidity and electric arc for shields of complete switchgears. Using a polyharmonic signal of a given shape allowed two sensors to be simultaneously polled. Temperature and humidity sensors are made in the form of fiber Bragg gratings with special spectral characteristics.

Keywords: Bragg fiber grating, sensor, humidity, temperature, electric arc, complete cabinet, power distribution system, optical fiber, lens, light