
The Roesttes Strain Gauge-3BB-A is a high-precision foil strain gauge manufactured by HBSENSOR (Haibo Sensor), a specialized producer of strain measurement solutions. HBSENSOR (Haibo Sensor) is a professional load cell sensor manufacturer focused on strain gauges, load cells, and force measurement systems. The company provides reliable solutions for industries, including measuring, analysis, and testing.
HAIBOSENSOR BF350-3BB strain gauge adopts phenolic aldehyde and epoxy backing, and imported EVAN grid material, with a resistance of 350±3Ω and a sensitivity of 2.1±1%, suitable for working environment of -30℃-60℃, featuring stable performance and accurate measurement. It is widely used in structural stress monitoring, material mechanics experiments, robot joint feedback, and medical rehabilitation, providing reliable data support for various strain detection.
| Category | Item | Specification | Unit |
|---|---|---|---|
| Basic Model & Dimensions | Model | BF350-3BB | – |
| Backing Dimension (L×W) | 6.8 × 7.6 | mm | |
| Grid Dimension (L×W) | 3.0 × 3.1 | mm | |
| Material Composition | Back Material | Phenolic aldehyde and epoxy | – |
| Grid Material | Imported EVAN | – | |
| Electrical Performance | Resistance | 2000 ± 5 | Ω |
| Tolerance to Average Resistance | ≤ 0.6 | Ω | |
| Sensitivity (Gauge Factor) | 2.1 ± 1% | – | |
| Environmental & Mechanical Performance | Operating Temperature | -30 ~ 60 | ℃ |
| Thermal Output | ≤ 2; ≤ ±30 | μm/m/℃; μm/m | |
| Insulation Resistance | 10000 | MΩ | |
| Limited Strain | 20000 | μm/m | |
| Mechanical Hysteresis | ≤ 1.2 | μm/m |
HAIBOSENSOR BF350-3BB strain gauge, with precise resistance accuracy, low temperature drift, and high mechanical stability, is the core sensitive component of various small/miniature weighing and pressure sensor modules. It focuses on three core fields of weighing sensing, industrial force measurement, and precision detection, with precise application scenarios as follows:
Fabrication of weighing sensors: The core sensitive component of single-point load cells, parallel beam load cells, and miniature load cells, suitable for the R & D and production of civil/commercial small weighing equipment such as electronic scales, kitchen scales, courier scales, and small bench scales;
Industrial small force measurement: Fabrication of miniature pressure sensors and miniature tension-compression sensors, applied to industrial precision force measurement scenarios such as small force measurement in automated production lines, pressure detection in light industrial packaging equipment, and micro tension measurement in textile machinery;
Precision sensing of instruments and meters: The built-in sensing core of various portable testing instruments and miniature force measurement instruments, suitable for small force value detection in laboratories and precise collection of micro-deformation/micro-force values in industrial sites.
We provide custom bonding service: according to customers’ elastomer dimensions and installation conditions, we professionally complete precise bonding, curing, lead welding, and temperature compensation debugging of strain gauges, ensuring the bonding fit and sensor detection accuracy, greatly shortening customers’ production cycle, and adapting to the development needs of various customized sensor modules.


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