Foil Type Strain Gauge
BTM Bolt Strain Gauge Series
These gauges are used for measurement of tensile strain of bolt. They are simply inserted into pre-drilled hole in the bolt with exclusive adhesives. This method is recommendable when an ordinary strain gauges can not be mounted on the bolt surface. Accurate tensile force measurement is possible by calibrating the bolt after installing the bolt gauges.
| Type | Gauge length (mm) |
Gauge width (mm) |
Backing length (mm) |
Backing width (mm) |
Resistance (Ω) |
|---|---|---|---|---|---|
| BTM-1C (Φ1.6mm) | 1 | 0.7 | 5.6 | 1.4 | 120 |
| BTM-6C (Φ2mm) | 6 | 1.0 | 12.0 | 1.7 | |
| BTM-6CTA
Temperature-integrated （-10 to +80℃） (Φ2mm) |
6 | 1.0 | 12.0 | 1.7 |
Each package contains 10 gauges.
| Load (kN) | 0.0 | 4.6 | 9.2 | 13.8 | 18.4 | 23.0 | Nonlinearity (%RO) | Calibration coefficient (kN/1×10-6) |
| Indicated strain (×10-6) | 0 | 378 | 747 | 1129 | 1518 | 1916 | 1.1 | 0.0120 |
[We also embed temperature-integrated BTM (bolt gauge). Contact us for details.]
| Type | Gauge length (mm) |
Gauge center a (mm) |
Backing diameter b (mm) |
Resistance (Ω) |
Applicable hole diameter (mm) |
|---|---|---|---|---|---|
| BTMC-05-D10-003LE | 0.5 | 5 | Φ0.9 | 120 | Φ1.0 |
| BTMC-1-D16-003LE | 1 | 5 | Φ1.5 | 120 | Φ1.6 |
| BTMC-3-D20-003LE | 3 | 10 | Φ1.9 | 120 | Φ2.0 |
Each package contains 10 gauges.