The BX350-3AA High Precision Resistance Strain Gauge is a foil metal strain gauge designed for measuring mechanical strain and for constructing pressure sensors, load cells, weighing sensors and force measurement systems. BDTronics offers this high-precision strain gauge for electronics, instrumentation, robotics, industrial measurement and DIY sensor projects.

The BX350-3AA can be bonded directly to a suitable structural component to measure deformation caused by force, pressure, tension, compression or weight. When the component deforms, the resistance of the strain gauge changes, allowing the mechanical strain to be measured using an appropriate bridge circuit and signal-conditioning electronics.

Its 350Ω nominal resistance makes it suitable for precision strain measurement applications where stable resistance characteristics are required. The supplied product information specifies a 0.02 strain limit/precision level for applications requiring high manufacturing accuracy.

Features:

• High-precision foil metal strain gauge

• BX350-3AA model

• 350Ω nominal resistance

• Designed for accurate resistance-based strain measurement

• Suitable for pressure sensor construction

• Suitable for weight and force measurement

• Can be bonded directly to mechanical components

• Useful for load cell and weighing sensor projects

• Good running stability

• Suitable for precision instrumentation

• Compact sensing element for custom sensor designs

• Suitable for DIY and industrial measurement applications

Specifications:

• Model: BX350-3AA

• Product Type: Resistance Foil Strain Gauge

• Gauge Type: Metal Foil Strain Gauge

• Nominal Resistance: 350Ω

• Strain Limit: 0.02

• Application: Strain, pressure, force and weight measurement

• Sensor Configuration: Suitable for full-bridge sensor construction

• Quantity: 1 piece

• Shipping Weight: Approximately 0.03kg

• Shipping Dimensions: Approximately 6 × 5 × 1cm

Note: The supplied specification also lists 120Ω under resistance. Because this conflicts with the stated 350Ω specification, verify the required resistance value before purchasing if your circuit specifically requires a 120Ω strain gauge.

Working Principle:

A strain gauge works by converting mechanical deformation into a measurable change in electrical resistance. When the material to which the gauge is attached stretches or compresses, the metal foil pattern also deforms, causing its electrical resistance to change.

For precision measurement, strain gauges can be arranged into a Wheatstone bridge or full-bridge circuit. The resulting small differential voltage can then be amplified and processed using a suitable instrumentation amplifier or ADC module.

For example, a strain measurement system can use a strain gauge with a suitable bridge circuit and an amplifier such as an HX711-based load-cell interface, depending on the required measurement configuration.

Applications:

• Load cell construction

• Weight sensor projects

• Pressure sensor construction

• Force measurement

• Mechanical strain measurement

• Weighing systems

• Electronic scales

• Robotics force sensing

• Industrial instrumentation

• Structural testing

• DIY load cells

• Custom pressure sensors

• Experimental mechanical measurement systems

Installation Considerations:

The strain gauge must be firmly bonded to a clean, suitable surface so that mechanical deformation is transferred accurately from the measured component to the foil element. Surface preparation, adhesive selection, gauge alignment and wiring quality can significantly affect measurement accuracy.

For a full-bridge measurement system, use the appropriate bridge configuration and precision signal-conditioning circuit. The gauge should be positioned according to the direction of the strain that needs to be measured.

Package Contents:

• 1 × BX350-3AA High Precision Resistance Strain Gauge

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