This is a foil strain gauge with a polyimide backing and is designed for measuring stress in the optional direction in a plane stress field. It detects stress in the gauge axial direction regardless of the shearing strain. This gauge is available for three materials: mild/ferritic steel (Poisson's ratio=0.285), stainless steel SUS304 (Poisson's ratio=0.305), and aluminium (Poisson's ratio=0.330).
| Main Test Materials |
Metal |
Materials Backing |
Polyimide |
| Operating Temperature |
-20 to +200°C |
Materials Element |
Cu-Ni alloy foil |
| Compensation range |
+10 to +100°C |
Strain limit |
__ |
| Bonding adhesive |
NP-50
CN,C-1 |
Fatigue life at room temp. |
1×106
(±1500×10-6) |
Single element(G.F. 2.1 approx.)
| Gauge pattern |
Type |
Gauge
length
(mm) |
Gauge
width
(mm) |
Backing
length
(mm) |
Backing
width
(mm) |
Resistance
(Ω) |
Poisson's ratio of specimen |
|
SFA-285-11 |
4 |
3 |
9 |
6 |
120 |
0.285 |
| SFA-305-17 |
4 |
3 |
9 |
6 |
120 |
0.305 |
| SFA-330-23 |
4 |
3 |
9 |
6 |
120 |
0.330 |
|
