Optical temperature sensors OTG3 0E, OTR 148Z 1E, OTR 141R 1E

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Point temperature sensors based on FBG (Fiber Bragg Grating) structures. They are designed to measure the temperature of gaseous, liquid and solid substances. The maximum temperature range is -50 to 200 °C. These fully dielectric sensors are designed for specialized measurements in highly electromagnetically disturbed environments.

APPLICATION

Advanced industrial applications.
Power industry (temperature measurement of transformer windings, electric motors, etc.).
Automotive (temperature measurement of charging stations, batteries).
Avionics, aerospace.

KEY FEATURES

Long-term stability, accuracy and repeatability of measurements.
Measurement accuracy linear over the entire range of measured temperatures.
Large dynamic range, sensors can be located up to several kilometers from the evaluation unit.
Completely dielectric sensor – galvanic isolation of the measuring point with the evaluation electronics.
Immune to electromagnetic radiation.

ACCESSORIES

Interconnecting fibre optic cable between evaluation electronics and sensors.
Fibre optic switch.
Converter to RS485.

Technické parametry

SYSTEM SPECIFICATIONS
Measuring range	-50 °C až 200 °C
Sensor type	FBG (Fiber Bragg Grating)
Number of measuring channels*	4, 7, 10, 13, 16
Measuring period*	3.5 s
Accuracy class	A
Measurement resolution	0.1 °C
Absolute accuracy over the entire range	± 0.5 °C
Fibre optic interface	LC/APC
Power supply	230 VAC / 50 Hz
Input power	Up to 10 W
Communication interface**	Ethernet (RJ-45), RS-485 (Modbus)
Operating temperature of the evaluation unit	0 °C – 40 °C
Weight of the evaluation unit	1.5 kg
Dimensions	230 × 115 × 80 mm
Warranty	1 year

* Depending on the fibre optic switch used and the number of measurement channels.
** Depending on the specific configuration.

OTG3 0E
Ingress protection	IIP 67 according to EN 60529, as amended
Housing material	DIN 1.4571, DIN 1.4301 stainless steel
Sensor design	Smooth stem
Diametr	3 mm
Length	from 30 mm
Lead-in cable length	3 m
Fibre optic connectors	FC/APC

OTR 148Z 1E
Ingress protection	IIP 67 according to EN 60529, as amended
Housing material	DIN 1.4571, DIN 1.4301 stainless steel
Sensor design	Threaded
Diametr	3 mm
Length	from 40 mm
Thread type	M8
Lead-in cable length	3 m
Fibre optic connectors	FC/APC

OTR 141R 1E
Ingress protection	IIP 67 according to EN 60529, as amended
Housing material	DIN 1.4571, DIN 1.4301 stainless steel
Sensor design	Contact sensor
Length	55 mm
Lead-in cable length	3 m
Fibre optic connectors	FC/APC

The manufacturer issues an EU Declaration of Conformity.
Calibration is performed in the calibration laboratory of SENSIT s.r.o. (according to the requirements of EN ISO/IEC 17025, as amended). It is performed by comparison with calibration standards. Continuity of the standards and working measuring instruments is ensured within the meaning of Section 5 of Act No. 505/1990 on Metrology.