10 db/tétel BF350-3AA BF350 precíziós rezisztív nyúlásmérő / nyúlásmérő / nyomásérzékelőhöz / terhelési cella arduino-hoz
10Pcs/Lot BF350-3AA BF350 Precision Resistive Strain Gauge / Strain Gauge / for the Pressure Sensor / Load Cell for arduino
Product Description
Model: BF350-3AA (**) N*
Grid wire: length x width 3.2x3.1mm
Base size: length x width 7.4x4.4mm
Substrate material: modified phenolic substrate.
Grid wire material: made of constantan foil, fully enclosed structure.
Resistance: 350 ohm
Main Specifications
BF series
Typical resistance value
350
Tolerance to average resistance
≤±0.1%
Sensitivity factor
2.00-2.20
Sensitivity coefficient dispersion
≤±1%
Strain limit
2.0%
Fatigue life
≥1M
Temperature self-compensation coefficient
9,11,16,23,27
temperature range
-30- 80
How to use strain gauge

(1) Mainly applicable to the pressure sensor manufacturing process of 0.02 level. The 0.02 level means that the output error is within the range of plus or minus 0.02 at full scale. The accuracy is high. The specific sensor manufacturing process will be described in detail later.

(2) Directly measure the strain of the component.

Paste the strain gauge directly on the deformed part of the component. When the component deforms, the resistance value of the strain gauge changes. The resistance change of the strain gauge can be measured by the resistance strain measuring device (strain gauge), which can be converted into strain or proportional to the strain Electrical signals (voltage, current) are sufficient.

(3) The choice of the circuit (the key is marked red)

The resistance change of the strain gauge is very small, and there must be an appropriate circuit to detect the small change. We usually choose a circuit where the change of the strain gauge resistance can control the circuit, so that the circuit can output similar to the resistance change Electrical signal (voltage or current), and then proper processing of this signal (amplification processing).
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