Finding the right strain gauge for weight measurement hinges on accuracy, ease of use, and compatibility with your setup. This guide highlights five high-potential options that cover general purpose testing, load sensing, and integration with common measurement systems. Each pick includes a quick reference to key features and how it fits typical weight measurement tasks—from simple experiments to more precise load-cell projects.
| Product | Brand | Approx. Type | Key Use |
|---|---|---|---|
| Aggofory Strain Gauge 20AA | Aggofory | 120 Ohm Gauge | Surface strain measurement |
| Cuidr BX120-3AA | Cuidr | 120 Ohm Gauge | Three-layer foil gauge for general force/weight sensing |
| Aggofory Strain Gauge 80AA | Aggofory | 120 Ohm Gauge | Dynamic/static deformation measurement |
| DIYmalls 50kg Load Cell | DIYmalls | Half-Bridge, 50 kg | Weight sensing for Arduino projects |
| NEXTION 50kg Load Cell Pack | NEXTION | Half-Bridge, 50 kg | Scaled weight measurement with HX711 module compatibility |
Aggofory Strain Gauge 20AA 120 Ohm
The Aggofory 20AA strain gauge is designed to match various dynamic or static strain instruments such as YSV8316 and YSV7008. It is built for smart, convenient surface strain measurement when used with a Wheatstone bridge. The main part combines a sensitive grid with a substrate and uses two external wires to connect to the measuring machine without welding, simplifying integration into existing test rigs.
Cuidr BX120-3AA 120 Ohm Strain Gauge
The BX120-3AA strain gauge features a three-layer construction: protective laminate top, thin metallic sensing element, and a plastic film base. As a sensor, its resistance varies with applied force, converting weight, tension, or pressure into measurable electrical changes. Selecting the right gauge direction is important for capturing the primary strain in your application.
Aggofory 80AA 120 Ohm Strain Gauge
This higher-performance Aggofory gauge shares the same fundamental design as the 20AA model, with emphasis on handling a range of static and dynamic deformations. It is well-suited for more demanding surface strain measurements where a Wheatstone bridge provides stable output, and it connects through a simple external wiring setup without welding.
DIYmalls 50kg Load Cell Half Bridge
The DIYmalls load cell features a 50 kg capacity and is designed as a half-bridge strain gauge. It supports multiple configurations: you can use two sensors to form a full bridge for higher accuracy, or pair a sensor with an external resistor to achieve a full-bridge setup. This flexibility is suitable for Arduino projects and DIY weight measurement experiments.
NEXTION 50kg Load Cell Half Bridge
The NEXTION 50 kg load cell is a half-bridge sensor suitable for weight measurement applications. It supports common configurations such as full-bridge arrangements when paired with additional sensors or external resistors. Like other half-bridge gauges, it pairs well with HX711 or similar amplifiers for precise digital readouts in hobbyist and educational projects.
Taidacent BF1K-3HA-E Half Bridge Gauge
The Taidacent BF1K-3HA-E half-bridge strain gauge offers resistance-type sensing with variants such as 350/1000/120 ohms. It includes specifications about heat output and dispersion, providing a reliable option for torque or shear-related measurements. It suits experiments focusing on precise force-to-resistance conversion under varying temperatures.
Buying Guide: Key Purchase Considerations
- Resistance and compatibility: Most gauges use 120 ohms or 350 ohms; confirm compatibility with your bridge circuit, amplifier, and data acquisition system.
- Bridge configuration: Half-bridge gauges (like many 50 kg options) require external components to form a full bridge. Full-bridge configurations often yield higher accuracy and stability.
- Static vs dynamic use: For static weight measurement, gauges with stable resistance are preferred; for dynamic tests, choose models rated for repeated deformation and faster response.
- Wiring and installation: Look for gauges with straightforward wiring and two external connection leads, avoiding the need for welding in many setups.
- Environmental tolerance: Consider protective laminates and operating temperature ranges, especially for experiments in varied environments.
- System integration: Ensure compatibility with common load-cell amplifiers (e.g., HX711) and microcontroller platforms if you plan DIY data logging or automation.
- Cost vs accuracy: Higher-precision gauges can improve results but may require more precise instrumentation and calibration. Balance cost with project requirements.
In choosing a strain gauge for weight measurement, consider your target range, the environment, and how you plan to read and process the signal. The options listed here cover straightforward surface measurements, flexible full-bridge implementations, and ready-made load-cell configurations suitable for hobbyist to mid-range professional applications.