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FOS Strain Gauge

INSTRINSICALLY SAFE

IMMUNE TO LIGHTNING / EMI /RFI

STATIC / DYNAMIC RESPONSE

When bonded to a specimen, the FOS Fiber optic strain gauge measures the expansion and contraction of material due to mechanical stress or thermal effect

Description

ROCTEST’s FOS fiber-optic strain gauges are the best choice for high-performance strain measurements. The strain gauge measures the expansion and contraction of material due to mechanical stress or thermal effect.

The strain gauges are designed around a Fabry-Perot interferometer (FPI). When bonded to a specimen, the strain transferred to the gauge is converted into engineering units by the readout.

FOS strain gauges are insensitive to any pulling or manipulation of the incoming fiber. This feature is advantageous when the gauge is embedded in composite materials. Long-term reliability of the gauge length is guaranteed by the welding method that avoids any internal creep that may arise from the use of adhesives.

Specifications

Transducer type 

Non temperature-compensated fiber optic strain gauge

Range1 

±1000, ±2500, ±5000

Resolution 

0.01% of F.S. (readout dependent)

Precision 

Range dependent

Transverse sensitivity 

<0.1% of F.S. 

Operating temperature 

−40 to +250°C (cable and adhesive dependent / installation over 200°C susceptible to creeping)

Fiber optic cable 

CFO-3STD or CFO-1HT

Gauge material 

Glass

Connector 

ST

Gauge diameter 

230 μm

Capillary length 

8.5 to 10 mm (depending on range)

Ordering Info

Please specify:

  • Range
  • Cable type and length (2 meters min.)
  • Readout
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