Products

FAC series Crack detection gauge

These gauges are designed to measure the propagation speed of fatigue crack in a metal specimen. The gauges are bonded with an adhesive on the position where the crack is initiated or the crack initiation is expected. The grids of the gauges, which are aligned at interval of 0.1mm or 0.5mm, are disconnected one by one with the propagation of the crack. The gauges are used together with the crack gauge adaptor CGA-120B, and the disconnection of one grid is measured as the change of approx. 45 or 40×10-6 strain by a strainmeter.

Applicable
specimen
Metal, Concrete
Backing
Special plastics
Operational
temperature(°C)
-30 ~ +80°C
Element
Cu-Ni
Temperature
compensation
range(°C)
Strain limit
Applicable adhesive
CN, RP-2
Fatigue life
at room temperature

Detailed material

CRACK LENGTH AND PROPAGATION MEASUREMENT

DD

Type
Measuring
range
(mm)
Backing
size
(mm)
Gauge
resistance
(Ω)
Grid
interval
(mm)
Number
of grid
FAC-5 4.5 28×5 1 0.1 46
FAC-20 20 43×25 1 0.5 41
Each package contains 10 gauges.
Type
Number of channels
Operational
temperature(°C)
Dimension
Weight
CGA-120B 1 -30 ~ +80°C 20(W)15(H)15(D)mm
5g

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