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Products

Optical Strain Gage (SG) OL

Special features

  • Optical SG - based on fiber Bragg grating
  • Up to 13 optical strain gages per glass fiber
  • Installation similar to electrical SG
  • All relevant data has been determined and specified, e.g. gage factor
  • Insensitive to electromagnetic interference
  • For use in potentially explosive atmospheres
  • Reduced wiring effort compared to electrical SG
  • Light weight of glass fiber com- pared to conventional connecting leads

Design

Glass fiber with Bragg grating, symmetrically embedded in modified acrylic resin

Outside diameter of the glass fiber

Core diameter of the glass fiber Diameter with buffer

mm

mm mm

185

5

1.5

Dimensions

Length Width Thickness

mm mm mm

Strain gage with potting (Standard)

40±1

12±0.5

2.0±0.5

Strain gage without potting (on customer request)

30±1

5±1

0.5±0.01

Connector (plug)

FC/ACP

Available Bragg wavelengths

nm

1520, 1525, 1530, 1535, 1540, 1545, 1550, 1555,

1560, 1565, 1570, 1575, 1580

Bragg wavelength tolerance

nm

±1

Gage factor

approx. 0.78, specified on each package

Gage factor tolerance

%

±2

Maximum output reflectivity

%

15

Reference temperature

°C [°F]

23 [73.4]

Operating temperature range

°C [°F]

-10 ¼ +80 [14 ¼ +176]

Storage temperature range

°C [°F]

-20 ¼ +100 [-4 ¼ +212]

Temperature response

(thermal expansion coefficient of the test object 0 mm/m/K)

Temperature response as a function of the change in wave length

Dl/l0 per K

mm/m/K ppm/K

7.0

5.5

Tolerance of the temperature response

mm/m/K

±1

Max. elongation at reference temperature using Z70 adhesive absolute strain value for positive direction

absolute strain value for negative direction

mm/m

mm/m

10,000 (1 %)

10,000 (1 %)

Fatigue life, at reference temperature using Z70 adhesive

Number of load cycles LW at

alternating strain ew = ±1000 mm/m and variation of zero point emD £ 30 mm/m alternating strain ew = ±3000 mm/m and variation of zero point emD £ 60 mm/m

Fatigue life, at reference temperature using X280 adhesive

Number of load cycles LW at

alternating strain ew = ±5000 mm/m and variation of zero point emD £ 100 mm/m

>>107 (interrupted after 107 load cycles)

>>107 (interrupted after 107 load cycles)

>>107 (interrupted after 107 load cycles)

Minimum radius of curvature (longitudinal and transverse)

at reference temperature

mm

25

Bonding material that can be used

cold curing adhesives

Z70, X60, X280

Optical Strain Gage (SG) OL - РУССКИЙ технические характиристикихарактиристикитехнические характиристики26 / 10000 АНГЛИЙСКИЙ Перевести вGoogleBing technical parameters PDF, 0.24 Kb