Attributes

Brand	-
Category	Robotics / STEM Teaching Tools / Sensors
Origin	-
Model Number	BF350-3AA
Resistance Value	350 Ohms
Bridge Configuration	Full-Bridge
Base Material	Phenolic Resin
Grid Material	Constantan Alloy
Operating Temperature	-30°C to +80°C
Strain Limit	2.0%
Gauge Factor	2.0 ± 1%
Application Type	Pressure, Bending, Stress Analysis
Package Contents	4 Sensors per Pack

6 reviews

Anonymous

Mar 30, 2026

Rating: 5/5

Great for force feedback

Integrated these into a robotic gripper to measure gripping force. The response time is fast enough for our control loop, and the durability has been impressive over several months of testing.

Anonymous

Mar 28, 2026

Rating: 4/5

Good value for stress testing

We deployed these on a steel beam for a university project. They held up well under cyclic loading. The only reason for 4 stars is that the adhesive tabs could be slightly larger for easier handling, but performance is solid.

Anonymous

Mar 23, 2026

Rating: 5/5

Excellent stability for load cells

Used these BF350 modules to build a custom kitchen scale load cell. The zero drift is minimal after curing, and the full-bridge configuration simplified the wiring significantly. Highly recommended for DIY instrumentation projects.

Anonymous

Mar 19, 2026

Rating: 5/5

Perfect for Arduino projects

Paired this with an HX711 amplifier and an Arduino Uno. The signal output is clean and responsive to weight changes. Great precision for the price point compared to pre-made load cells.

Anonymous

Mar 18, 2026

Rating: 5/5

Reliable data acquisition

I have used various strain gauges over the years, and this full-bridge module offers consistent results. The temperature compensation seems effective within the specified range. Will purchase again.

Anonymous

Mar 05, 2026

Rating: 4/5

Works as described

Straightforward to install if you follow the surface preparation instructions carefully. The resistance matching between the four gauges in the bridge is very tight, which reduces initial offset voltage.

5 FAQ

Q: Is a separate amplifier required to read the output?

A: Yes, the output signal from a strain gauge bridge is in millivolts. You will need an instrumentation amplifier, such as the HX711 or INA125, to boost the signal to a level readable by microcontrollers or data acquisition systems.

Q: What is the maximum excitation voltage recommended?

A: For continuous operation, we recommend an excitation voltage between 5V and 10V DC. Short-term measurements can handle up to 15V, but higher voltages may cause self-heating effects that alter accuracy.

Q: Can these be used outdoors in rain?

A: The sensor itself is not waterproof. If used outdoors or in humid environments, you must apply a suitable moisture-proof coating (such as silicone rubber or epoxy) over the installed gauge to protect it from water damage.

Q: Does this module come with adhesive pre-applied?

A: Yes, the BF350 modules typically come with a self-adhesive backing protected by a release film. However, for critical applications, we recommend using additional specialized cyanoacrylate glue for maximum bond strength.

Q: What surface preparation is needed before installation?

A: The mounting surface must be clean, dry, and smooth. We recommend cleaning with isopropyl alcohol, lightly sanding the area to remove oxidation, and degreasing again before peeling the backing and applying the sensor.

Explore your interests

STC32G12K128 STC8H8K64U Microcontroller Small System Core Board Development Board Emulator

$16.50

Youxin Electronics_STM32H743IIT6 Core Board System Board Learning Board STM32 Development Board

$118.00

Arduino DUE Development Board 32-bit ARM Controller A000062 Italian Official Original Import with Cable

$299.00

Ultrasonic Sensor HC-SR04 Ultrasonic Distance Measuring Module Bracket US015-025-026-100

$3.16

Serial SHT20 Chip Temperature and Humidity Sensor Test, SHT30 Chip Measurement and Monitoring Module by Viter Intelligence

$11.00

High-Speed Yabo Smart Raspberry Pi 4B Motherboard Development Board Accessories RaspberryPi 2G/4G/8G RAM Py

$494.30

Magnetic Circular Counting Chips, Two-Sided Flip Coins for Elementary Math, Kindergarten Early Education, Ten-Frame Matrix, Addition/Subtraction within 10 & 20, Teaching Tools

$11.90

3-Wire/4-Wire Flame Sensor Module, Fire Source Detection with IR Receiver, Flame Detection and Alarm

$1.08

SANSI White Label Class A Glass Graduated Cylinder C18 Micro-Precision Demulsification Cylinder with Scale Measurement Includes Certificate Ground Joint Stopper Hexagonal Bottom Borosilicate Glass Lab Equipment

$3.68

EV2400 Battery Unlock Fuel Gauge Programmer MSP430 HPA500 Evaluation Module Interface Board SMBus

$323.00

Cube Three-View Teaching Aid with Grid - 3D Geometry Observation Tool for Grades 4-5 Math (2cm Cubic Blocks Set)

$15.10

OrangePi Orange Pi Zero3 Zero 3 Development Board Allwinner H618 Orange Pi

$228.00

Digital 38KHz Infrared Receiver Transmitter Head Sensor Module Electronic Building Blocks Robot Infrared Communication Remote Control

$2.29

12V Stable Version Light-Control Switch No-Light Sensing with Extension Cable Photoresistor Plus Relay Module

$49.20

STM32 Smart Car 51 Microcontroller Arduino Obstacle Avoidance Chassis Kit Mecanum Wheel Robot Car

$40.80

Tech Small Production Small Invention DIY Piano Electronic Keyboard Real Playable Science Small Handmade DIY Materials

$33.00

[Youxin Electronics] GP2Y0E03 Infrared Distance Sensor Module 4-50cm Range

$23.65

Transparent 3D Geometric Model Perspective Decomposition Graphic Teaching Aid, Complete Set for Elementary Grades 1-6 Math

$6.80

DHT22 Single-Bus Digital Temperature & Humidity Sensor AM2302 Module Electronic Building Blocks

$10.42

E18-D80NK Infrared Photoelectric Switch Diffuse Reflection Obstacle Avoidance Sensor Module 3-80CM

$12.60

LAN8720 Module Network Module Ethernet Transceiver RMII Interface Development Board Xinwei Electronics

$7.85

STC15W408AS Core Board Minimum System Board 51 Microcontroller Development Board TTSOP20 Learning Board

$18.47

New Version MEGA2560 R3 Development Board, Improved MEGA2560 R3 with Sensor Expansion Board

$13.68

Gradient Visual Illusion Kit: Electric Rotating Assembly Toy for Maker DIY, Paintable Handmade Model

$8.72

51/AVR Microcontroller Core Development Board STC89C52RC/51MCU Experiment Board/ATMEGA32 Learning Board

$37.90

[Trial Pack] Xianlang Complete Cat Treat Sticks Meal Packs Main Course Cans Freeze-Dried Cat Food Sample Snacks Gift Set

$15.00

GY-30 302 Digital Light Intensity Illuminance Sensor BH1750FVI Module Light Sensor Ball

$7.41

Foldable Clothes Drying Rack Floor Standing Home Balcony Bedroom Hanging Clothes Quilt Drying Artifact Outdoor Cooling Rod Indoor Drying Rack

$47.10

Metal Detector Module Non-Contact Metal Induction Sensor Detection Module Metal Detector

$8.70

RV1103 Miniature Linux Development Board: RISC-V Vision and AI with Ethernet Port

$53.10

For Arduino Development Board R3 Mainboard Microcontroller Module Kit Programming Learning Board Sensor Suite

$78.00

Xuefen Geometry Stamping and Tracing Set for Grades 1-2, 3D and 2D Ink Pads, Math Learning Tools, Cube and Cuboid Models

$4.51

Rubber Tire Toy 4WD Smart Car Wheels Car Model Robot Accessories (Suitable for 2mm Axle)

$0.50

E18-D80NK Infrared Obstacle Avoidance Sensor Proximity Switch Smart Robot Car 10-80cm

$6.30

Digital 38KHz Infrared Receiver/Transmitter Head Sensor Module for Electronic Building Blocks Robots, Infrared Communication Remote Control

$2.80

51 MCU Minimum System STC89C52 DIP40 Through-Hole Smart Car Main Control Board Learning Experiment

$19.80

Outdoor Adventure Kids' Insect Observation Box with Magnifying Glass, Boys & Girls Toy for Exploration, Butterfly Catching and Fish Scooping Tools

$7.80

MPU-9255 9-Axis Attitude 3-Axis Electronic Compass Accelerometer Gyroscope Magnetic Field Sensor Module

$13.42

Freeze-Dried Chicken Treats for Dogs: Nutritious Weight-Gain Breast Meat Chunks for Puppies – Teeth Cleaning, Grain Mixing, Universal Use

$3.90

Soil Moisture Sensor Probe Soil Moisture Meter Detection Module Sensor Separate Probe

$2.39