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Taidacent Strain Gauge 350 Ohm Bend Flex Sensor Weighing Amplifier Module Pressure Sensor Analog Output Strain Gauge Test Kit (Extension Cable)

4.8 (8) Write Review
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$14.56

$ 7 .99 $7.99

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1.Style:Extension Cable


  • Voltage: DC5V board with blue LED power indicator analog output
  • Bending angle: 0-30 degrees
  • The greater the degree of bending, the higher the output voltage: bending downwards, the output value decreases; bending upwards, the output value increases
  • With zero potentiometer
  • Output analog voltage 0-5V


Product Description

Product description

Voltage DC5V
Bending angle 0-30 degrees
Output analog voltage 0-5V
Board size 21mm × 34mm

There is a blue LED power indicator on the board

Analog output

The greater the curvature, the higher the output voltage

With zero potentiometer

The potentiometer can be used to adjust the output starting voltage

Pin output definitions are printed on the back of the board

(Bending the strain gauge can change the output voltage)

The module is connected to a 5V power supply, and the front strain gauge is slightly bent, the output voltage of OUT will change.

Question: How to use this and how?

This is a bending sensor

The principle of the scale is also to detect the bending degree. The strain gauge is attached to the carrier such as: iron, aluminum, plastic sheet, and then the carrier is bent. When the strain gauge detects the bending output voltage, the output voltage will change.

The strain gauge can be attached to any object to detect bending, and then our module bends to convert the voltage.

Component introduction

Model BF350-3AA (with temperature self-compensation)
Sensitivity coefficient 2.0 strain: 2%
Grid wire 3.2mm × 3.1mm
Base size length 7.4 * width 4.4mm
Base material modified phenolic substrate
Grid wire material made of constantan foil, fully enclosed structure
Resistance 350 ohms
Fatigue life > 10000000 times
Flux ordinary solder rosin

The working principle of the resistance strain gauge is made based on the strain effect, that is, when the conductor or semiconductor material is mechanically deformed under the action of external force, its resistance value changes accordingly. This phenomenon is called the "strain effect".

Attach the strain gauge to the object to be measured and bend it with the strain of the object to be measured, so that the metal foil inside bends with the strain. Many metals change their electrical resistance when they are mechanically bent.

strain gauge bending sensor module

T.R. Welter
Reviewed in the United States on February 8, 2025
The media could not be loaded.
MJLaverty
Reviewed in the United States on September 26, 2024
I'm using this as a feedback sensor and it's working out for me. since I didnt want to buildup a circuit to test what I was thinking, this saved me a lot of time and probably frustration. worked with a raspberry pi just fine as an analog input.
John A. Justin
Reviewed in the United States on September 21, 2024
I plan on using the strain gauge module as a load cell to accurately determine the amount of filament remaining on the reel for my 3D printer. I'll glue the strain gauge to a flexible lever arm and activate the module when the filament reaches a certain level to reduce the required dynamic range. I should be able to get it accurate to a few grams of available filament left on the reel.I will input the strain gauge module's output to an HX711 Load Cell Amplifier A/D and connect that output to an Arduino to process.The strain gauge module has a Wheatstone bridge followed by an amplifier to bring the voltage to a 5V range.Note that there are many 350 ohm strain gauge sensors available on Amazon that are similar to that which this module uses for less than a dollar per unit so experimenting is inexpensive.
R. Shine
Reviewed in the United States on July 30, 2024
By default the potentiometer is set so that with the strain gauge unstressed the output is about 2.5V. Bending up or down by 30 degrees with change the voltage linearly to 5 and 0V respectively. I did not have a setup that would allow me to do controlled graphs of output vs amount of bend. I also did not look at the affects of temperature.One thing you can do is if you only need to know about flex in one direction you can adjust the pot to get get more range of motion in the direction you want to measure.Twisting the strain gage can affect you reading.If all you need is a touch sensor there are simpler solutions, but if you do need to know the relative amount of flex this may be a good solution for you.
kluj
Reviewed in the United States on November 2, 2024
Works as expected on analog pins. Outputs are reasonably consistent (depends a lot on how you design the rest of the setup and interference from things like ceiling fans), but I found it's much easier to set triggers based on wide 100mV gaps rather than trying to get a precise numerical estimation of weight. It's also just fun to play around with.
B. A. Egan
Reviewed in the United States on October 6, 2024
Well, the module arrived but it was just the module. I know there is information here on the listing, but it would be nice to have a small card with specifications listed. This way, I know exactly what I’m looking at when I pull it for a project. Also, it would be nice if there was a PDF that characterizes the module in complete detail. Finding detailed documentation for cheap modules seems to be on par with finding a unicorn on the moon.
kozchris
Reviewed in the United States on October 27, 2024
The media could not be loaded.
Todd K. Moyer
Reviewed in the United States on October 21, 2024
I found it hard to get consistent results with this flex sensor... it was hard to find where it was sensitive to bending. However, with a bit of experimenting, it should be an interesting sensor to couple to a microcontroller.