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Turn Weight and Force into Useful Readings
The Strain Gauge Sensor BF350 3AA 5PCS is a rain sensor designed for scales, hopper monitoring, dispensing, and force measurement. It is a practical fit for makers, students, and engineers who want reliable sensor data in embedded builds.
Key details include Using temperature range: -30--+80; Size L x W: 6.9mm x 3.2mm.
Important: Load cells need a proper amplifier such as an HX711 and solid mechanical mounting. Small twists or uneven force can change the reading.
Why you’ll love it
- Useful spec: BF series
- Sensing range: -30--+80
- Compact size: 6.9mm x 3.2mm
- Maker-friendly build: Easy to use in prototypes, classroom projects, and custom electronics
- Common controller support: Works well with Arduino, ESP32, Raspberry Pi, and similar boards
- Project-ready sensing: scales, hopper monitoring, dispensing, and force measurement
Compare with similar products
| Product | Sensor style | Standout |
|---|---|---|
| Strain Gauge Sensor BF350 3AA 5PCS | rain sensor | Current item |
| Weight Load Cell 5kg Straight Bar | load cell sensor | weight sensing, pressure sensing |
| Weight Load Cell 10kg Straight Bar | load cell sensor | weight sensing, pressure sensing |
| Weight Load Cell 20kg Straight Bar | load cell sensor | weight sensing, pressure sensing |
What you can build
This sensor is a good fit for digital scales, dosing machines, smart bins, postal scales, and material testing rigs.
Starter bundles
Pair it with an Arduino-compatible board, ESP32, or Raspberry Pi, plus a breadboard or jumper wires for quick setup and testing.
Recommended add-ons
Useful add-ons include an HX711 amplifier, a rigid frame, and mounting hardware, depending on how you plan to power, mount, and log the sensor.
Technical specifications
| Product | Strain Gauge Sensor BF350 3AA 5PCS |
|---|---|
| The key technical indexes | BF series |
| Sensitivity coefficient | 2.00-2.20 |
| Temperature self compensation coefficient | 9,11,16,23,27 |
| Using temperature range | -30--+80 |
| Size L x W | 6.9mm x 3.2mm |
| Contrast | 800: 1 (Min) (transmission) |
| Resistance | 350 ohms |
| Strain limit | 2.0% |
Wiring & usage notes
Check the pin labels on the Strain Gauge Sensor BF350 3AA 5PCS and match them to your controller voltage, ground, and signal pins. Keep wiring short and verify the logic level before powering the module. Load cells need a proper amplifier such as an HX711 and solid mechanical mounting. Small twists or uneven force can change the reading.
What’s in the box
1 × Strain Gauge Sensor BF350 3AA 5PCS
Frequently Asked Questions
What does the Strain Gauge Sensor BF350 3AA 5PCS measure?
It is designed to measure rain or water presence.
Can I use it with Arduino, ESP32, or Raspberry Pi?
Yes. It is well suited for common maker and embedded platforms, as long as you power it at the correct voltage and match the signal level to your controller.
Do I need extra hardware?
Often yes. Force and weight sensors are commonly paired with an amplifier or conditioning board before they connect to a microcontroller.
Is it good for prototyping?
Yes. It is a practical choice for learning, proof-of-concept builds, and small automation projects.
Manila stock. Order before 16:00 PHT, ships today via J&T or LBC. Provincial: 1–3 working days.
Schools / class POs: we accept Purchase Orders for accredited schools and universities. contact us with your PO details.
Returns: 7-day inspection window for DOA units. Email proof of issue and we ship a replacement.
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