High precision high-temperature and low-temperature resistant fluorescent fiber optic temperature sensor-INNO

The length, accuracy, temperature measurement range, fiber diameter, and sheath material of fiber optic temperature sensors can be customized according to your needs. Please contact us for consultation!

Fluorescent fiber optic temperature sensing probes have many advantages that other temperature sensing probes cannot compare to, such as good electrical insulation, устойчивост на електромагнитни смущения, chemical corrosion, and no pollution. This makes fluorescent sensing probes not only used in many fields such as biology and medicine, but also have broad application prospects in the power industry. They are mainly used for temperature measurement of high-voltage instruments in electrical equipment, temperature measurement between generator diagnostic systems and transformer windings, temperature measurement of high-voltage circuit breaker contacts, and temperature measurement of high-voltage cable joints. Fiber optic

Introduction to Fluorescent Fiber Optic Sensing Probes
The fiber optic probe consists of three parts: ST connector, fiber optic cable, and end temperature sensing end. The ST connector is the connection part with the photoelectric module; Fiber optic cable is the transmission part, with quartz fiber inside. The quartz fiber has a coating and cladding on the outside, and a Teflon protective sleeve on the outermost part; The end temperature sensing end contains temperature sensing rare earth materials, which are used to generate optical signals containing temperature information; The optical fiber is resistant to high temperatures of 200 ℃ and has an outer diameter of 3mm. Long term bending radius of 13.2cm. Short term bending radius of 4.4cm. When the distance between the fiber optic lead and the ground is 0.4m, it can withstand a power frequency voltage of 100KV for a duration of 5 minutes.

Оптичен температурен сензор

The Temperature Measurement Principle of Fluorescent Fiber Optic Temperature Sensor

A fluorescent fiber optic temperature sensor is composed of a multimode fiber optic and a fluorescent object (membrane) installed at its top. Fluorescent substances emit fluorescence energy when stimulated by light of a certain wavelength (stimulated spectrum). After the incentive is revoked, the persistence of fluorescence afterglow depends on factors such as the characteristics of the fluorescent substance and environmental temperature. This excited fluorescence usually decays exponentially, and the decay time constant is called fluorescence lifetime or fluorescence afterglow time. The attenuation of fluorescence afterglow varies at different ambient temperatures. Следователно, by measuring the lifespan of fluorescence afterglow, the ambient temperature at that time can be determined.

Principle of Fluorescent Fiber Temperature Measurement

Measurement of hotspots in high-voltage power switchgear, including copper busbars, moving contacts, static contacts, incoming and outgoing lines, и така нататък;
Temperature monitoring of GIS cabinets, medium voltage cabinets, and low-voltage cabinet drawer cabinets;
Cable joints for ring main cabinets and temperature monitoring for box type substations;
Hot spot monitoring of dry-type transformer coils and oil immersed transformer windings;
Measurement of stator pressure index and collector ring temperature for water turbines/thermal/wind turbines;
Temperature measurement of enclosed busbars and cables;
Temperature monitoring in oil;
IGBT or chip surface temperature measurement;
Temperature measurement of fan blades; Temperature measurement at the connector connection point;
Medical hyperthermia human contact temperature measurement;
Nuclear magnetic resonance, ERFI, EMI, NMR, RF, microwave;
Etching machines, deposition equipment, small gaps, chemical liquids, vacuum environments;
Ring network cabinet head, hot spot temperature online monitoring;
Temperature monitoring for other harsh special environments.