2 Sets 50kg Load Cell E-Shaped Weighing Sensor Strain Half-Bridge Sensor + HX711 A/D Amplifier Weight Module DIY Kit (50KG, HX711)

Used in a project either an esp32s3 and they interfaced easily and work well. Driven with the 3.3v Vcc.

Made a scale with one of these and a raspberry pi, pretty accurate.

I bought these in anticipation of using them for a project, to which I am now getting. I need to build my platform, but have been working with the HX711 boards and a Python library that I found on line. Since I have not formally mounted these, I cannot speak a great deal to their accuracy, but a note of caution - if you find a library online and there are comments - read ALL of the comments, I discovered the article had errors and the author has done nothing to correct them. Use the wiring scheme presented here on Amazon. Use one cell per HX711 since channel B does not have the same options as channel A. I found the HX711 works with 3.3 volts (RPi) as well as 5 volts (also RPi, but the GPIO's are rated at 3.3 volts and will burn out at 5 volts, but I tried 5 volts and my RPi is working, but went to 3.3 volts) The HX711 mounting holes are around 2.6mm, definitely less than 3 mm (M3), Amazon has screw kits for M2.x screws, watch for the flat head v pan/hex/etc - the flat head could split your board if you get it too tight.

I received this item as a Christmas gift. Unfortunately I just got around to playing with them this weekend and one of the load cells was defective right out of the package. It had a broken or unconnected wire. I recommend that you check the resistance between all wires right away so that you can return them if defective. The resistances should read: Green-White = 1kOhm Red-Black = 1kOhm All other combinations = 0.75 kOhm

The good: I guess the HX711 works? The bad: The load cells were not matched and responded differently to the same force. I know, I tested them. Not suitable for a repeatable scale. These are very inexpensive for a reason.

Purchased the 10 kg versions. Load cells and HX711 were used with an ESP32 at 3.3V with no issues, and typical accuracy and precision expected. However, took off a star because of misleading information on threaded mounting holes. The design drawing specified two M4 and two M5 threaded holes. All the holes on the 10 kg cells were M4-0.70 threads.

When I connected the two sensors and started taking measurements I noticed that one had much greater measurement noise than the other. Ex: one might read 500 +/- 10 on average while the other was reading +/- 10000 or more. I wanted to use the two of them together to make a larger scale, but the excess noise would hurt the accuracy.

One of the two boards did not have the HX711 chip populated on it rendering the board useless.