Operating range -70 ÷ +500ºС

OSHT series

Fiber-optic temperature sensors (OSHT series) are meant for measuring temperature on various objects from -70 to +500ºС. The signals from the sensors are processed fiber interrogation monitors.

Principal advantages 
  • electromagnetic immunity;
  • high sensitivity;
  • reliability;
  • reproducibility and wide dynamic range;
  • high corrosion and radiation resistance;
  • fire safety;
  • possibility of spectral and spatial multiplexing of the sensing elements situated in the same or several different fibers;
  • significant distance to the place of measurement, small response time.

Technical parameters

Technical parameters



Type sensor design In line / end type end type
Sensor material Steel plate AISI 316L Steel tube AISI 316L
Size, mm 15х 15 х1.1 Ø 21 х 195
Method of attachment Welded joint Threaded connection
Connecting size М10
Length of submerged sensor part, cm 2 ÷ 200
Optical fiber protection material Steel tube AISI 316L
Resonance wavelength, nm 1510 ÷ 1590
Temperature measuring range, ºС -70 ÷ +500
Accuracy in the entire range, ºС ± 1.5* ± 4
Accuracy class according to GOST 6651-2009 B

* For end type sensor design.

Fiber-optic temperature sensors (OSHT series) from -70 to +500ºС.