Overview
A half-bridge sensor is a strain gauge-based device used to measure mechanical deformation, stress, or force. It consists of two active strain gauges arranged in a Wheatstone bridge configuration, where one gauge measures tension and the other measures compression. This design provides a balanced output signal, improving accuracy and reducing temperature-induced errors. Half-bridge sensors are widely adopted in industrial applications due to their reliability and cost-effectiveness. They are often integrated into load cells, pressure transducers, and structural monitoring systems. Their ability to function in harsh environments makes them suitable for automotive, aerospace, and construction industries.
Structure and Working Principle
The half-bridge sensor comprises two strain gauges bonded to a flexible substrate, typically arranged perpendicular to each other. When force is applied, one gauge stretches (increasing resistance) while the other compresses (decreasing resistance). These changes unbalance the Wheatstone bridge, producing a voltage output proportional to the applied force. Unlike a full-bridge sensor with four active gauges, the half-bridge configuration uses two active gauges and two fixed resistors. This reduces cost while maintaining reasonable sensitivity. The output signal is amplified and processed by external circuitry, making it compatible with data acquisition systems and controllers.
Key Features
Half-bridge sensors are valued for their high sensitivity, typically offering millivolt-level output per unit of strain. They exhibit excellent temperature stability, as the two active gauges compensate for thermal drift. Their compact size allows integration into tight spaces, making them ideal for embedded applications. Another advantage is noise immunity, as the differential output cancels out common-mode interference. However, they are less sensitive than full-bridge sensors and may require additional signal conditioning for precise measurements in low-strain scenarios.
Application Areas
These sensors are extensively used in load cells for weighing systems, including industrial scales and hopper monitors. In automotive applications, they measure suspension loads, brake pressure, and crash-test forces. Aerospace engineers employ them for wing deflection testing and landing gear monitoring. Civil engineering applications include structural health monitoring of bridges, buildings, and pipelines. They are also found in medical devices, such as prosthetic limb force feedback systems. Their versatility and adaptability make them indispensable in precision measurement tasks across industries.
Maintenance and Precautions
Proper installation is critical for half-bridge sensors. They must be firmly bonded to the measurement surface without air gaps or uneven adhesive layers. Avoid exposing them to moisture or corrosive chemicals unless specifically rated for such environments. Regular calibration is recommended to maintain accuracy, especially after mechanical shocks or extreme temperature cycles. When storing spare sensors, keep them in dry, temperature-controlled conditions. Always observe the manufacturer's specified load limits to prevent permanent damage or signal drift.
B2B Procurement Guide
When sourcing half-bridge sensors, clearly define your measurement range, accuracy requirements, and environmental conditions. Consider whether you need pre-wired sensors or raw gauges for custom integration. Verify compatibility with your signal conditioning equipment or specify the need for integrated amplification. For bulk purchases, request samples to test performance under actual operating conditions. Evaluate suppliers based on technical support capabilities, lead times, and customization options. Establish long-term relationships with manufacturers who can provide consistent quality and traceable calibration data.
Related Manufacturers
- 主营：[]
- 主营：[]
- 主营：[]
- 主营：数据采集卡、高速采集卡、采集模块、全桥或半桥、测控机箱、控制器、矩阵开关模块、万用表卡、高速数字化仪、24位IEPE卡、高速示波器卡、电压采集卡、电流采集卡、PXI、PCIe、PXIe、板卡、开关卡、串口卡、数据采集器
- 主营：打印秤、电子地磅、小型磅秤、称重传感器、测力传感器、扭矩传感器、波纹管传感器、应变片称重传感器、轮式称重传感器、电子台秤、电子称台、重量变送器、电子天平称、计重电子秤、精密电子秤、电子天平秤、防水电子计数秤、高精度称重模块、配料秤、称重模块、无人智能称重货架、皮带检重秤、金属检测机、失重秤、喂料机
- 主营：HIRT传感器、进口设备及配件
- 主营：半桥传感器、液相色谱、多普勒模拟器
- 主营：测量仪、气动量仪、数据采集器、传感器、数显千分表
- 主营：数字仪表、s形拉压双向、模拟型变送器、静扭传感器、单点式传感器、三轴力传感器、悬臂式传感器、微应变传感器、压缩式传感器、动态扭矩传感器、压力传感器ns100a、拉压双向传感器、压力传感器ns115p、微型压式传感器、数字峰值保持器
- 主营：以太网芯片、MARVELL/迈威、汽车芯片、霍尔效应传感器、收发器、MOS管、充电IC、电源IC、集成电路IC、驱动芯片、稳压芯片、交换机芯片、MCU单片机、微控制器、监控IC、蓝牙芯片、音频IC、通讯芯片、感应器、场效应管、工控IC、博通芯片、网通WiFi芯片、路由器芯片、REALTEK/瑞昱
- 主营：称重传感器
- 主营：孔径测量仪、螺纹测量仪、齿轮测量仪、位移传感器、DIATEST量仪、KORDT测量仪、外径测量仪、KROEPLIN卡规、girodtast杠杆表、Metro显示仪、小孔测量仪、电子塞规、外径比较仪、内齿棒间距测量仪、齿轮花键M值测量仪、螺纹深度规、外齿轮跨棒距测量仪、带表塞规、两瓣式小孔涨簧表、缸径规、电感测头、电感测微仪、外径千分尺、电子测微仪、内径千分表、内外径卡规
- 主营：称重传感器、压力传感器、测力传感器、微型传感器、应变片、电阻应变计、电阻应变片
- 主营：婴儿秤、电子叉车秤、定量包装机、传感器、高精度电子秤、电子秤称重仪表
- 主营：浓度计、温度计、检测仪、位移传感器放大器、角度计、膜厚计、密度计、退磁机、噪音计、气压计、数字ph计、雾化喷头、温湿度计、特斯拉计、负离子计、防水orp计、加速度计、气象仪器、热成像仪、倒角卡尺、数字示波器、数字万用表、漏水探知器、数字盐度计、振动测试仪、离子测试仪
- 主营：制动器、热封控制器、热封温控器、工业配件
- 主营：应变式传感器、电网拉力传感器、电阻应变计
- 主营：扳手扭矩、测量张力、紧力测量、传感器、显示仪表、芯带屏蔽、开关推力、5t3t2t1t500kg、4芯电缆线、拖链电缆线、扭力感应器、测试感应器、信号放大器、模拟放大器、电机扭力测速、咬合力感应器、工装夹紧测力、机器人手指捏、咬合力检测仪、螺丝防松检测、咬合力显示仪