This load sensor, sometimes called a strain gauge, is the same one found in digital bathroom scales (you know, the ones you use in January for your New Year's resolutions, and then forget about a month later).
The sensor is a group of half-bridge strain gauge, there are 3 ways to use it :
1. Use one sensor with an external resistor to form a full-bridge measurement, the range of a sensor range: 50kg. External resistance on the higher requirements.
2.Use two sensors to form a full-bridge measurement, measuring range for the sum of the two sensors: 50kgx2 = 100kg
3.Use four sensors to form a full-bridge measurement, measuring range for the sum of four sensors: 50kgx4 = 200kg

Product Parameter
Range: 50kg
Zero Output: ±0.3mV/V
Output sensitivity: 1.0±0.15mV/V
Linearity: 0.2%F.S
Hysteresis: 0.2%F.S
Repeatability: 0.1%F.S
Creep: 0.1%F.S(3min)
Output (Input) Impedance: 1000±10Ω
Operating temperature: -10C~+40°C
Quadrature error: 0.15%F.S
Zero temperature drift: 0.3%F.S/10°C
Temperature sensitivity drift: 0.3%F.S/10°C
Insulation resistance: ≥2000MΩ
Excitation voltage: 5-10V DC
Limit overload: 150%F.S
Overall Accuracy: 0.3%F.S
Wire length parameter: 45cm

Package Includes:
4 X 50kg load cell
1 X HX711 Ad Module