称重传感器按结构分，最常见的有三种：单点式、悬臂梁、剪切梁。它们长得像、都能称重，但适用场景完全不同。选错了，轻则精度不达标，重则传感器损坏、设备故障。
这篇文章把三种传感器讲清楚。
一、单点式传感器
结构特点： 只有一个受力点，通常是方形或圆形的小型传感器，靠中心点受力。
适用量程： 小量程为主，一般 10～200kg
典型应用：
- 小型台秤、平台秤
- 检重秤、包装秤
- 灌装机
- IVD 设备、实验室称重
优点： 精度高、响应快、体积小 局限： 不适合大量程，不适合有强侧向力的场景
怎么选： 小量程、高精度、动态称重选单点式。
二、悬臂梁传感器
结构特点： 一端固定、另一端受力，像一根悬挑的梁，受力后产生弯曲形变。
适用量程： 中量程，一般 10～500kg
典型应用：
优点： 量程覆盖广、精度高、安装灵活、抗偏载能力较强 局限： 对安装水平度有一定要求
怎么选： 中等量程、多支组合称重的场景选悬臂梁，是最通用的类型。
三、剪切梁传感器
结构特点： 受力后内部产生剪切形变，结构粗壮，抗侧向力和过载能力强。
适用量程： 大量程，一般 200kg～数吨
典型应用：
优点： 抗过载、抗侧向力、耐振动、适合恶劣环境 局限： 体积较大，不适合小量程
怎么选： 大量程、带搅拌振动、有侧向力的场景选剪切梁。
四、三种传感器对比速查
| 对比项 | 单点式 | 悬臂梁 | 剪切梁 |
|---|
| 量程 | 10-200kg | 10-500kg | 200kg-数吨 |
| 结构 | 单点受力 | 一端固定 | 剪切受力 |
| 精度 | 高 | 高 | 高 |
| 抗偏载 | 一般 | 较强 | 强 |
| 抗过载 | 一般 | 较强 | 强 |
| 典型场景 | 台秤、检重秤 | 料斗秤、配料 | 反应釜、料罐 |
五、选型决策树
你的设备称重范围是多少？
│
├─ 200kg 以下
│ ├─ 是平台秤/台秤/检重秤 → 单点式（或悬臂梁）
│ └─ 是料斗/配料/包装 → 悬臂梁
│
└─ 200kg 以上
├─ 是料罐/反应釜/地磅 → 剪切梁
└─ 是大型平台/料斗 → 剪切梁或悬臂梁（看具体结构）
六、源力传感产品对应
| 类型 | 源力型号 | 量程 | 特点 |
|---|
| 单点式 | YLA7 | 15-150kg | 高精度，IP67，对标 HBM PW15B |
| 单点式 | YLA9 | 10-100kg | 食品医药级，IP68，对标 HBM PW15AH |
| 悬臂梁 | YLA6 | 10-500kg | 全不锈钢 IP68，对标 HBM Z6 |
| 剪切梁 | YLA8 | 220-1760kg | 焊接密封 IP68，对标 HBM HLCB1 |
By structure, load cells are most commonly divided into three types: single-point, cantilever beam and shear beam. They look similar and all weigh, but their applicable scenarios are completely different. Choose wrong and, at best, accuracy falls short; at worst, the load cell is damaged and the equipment fails.
This article explains the three load cell types clearly.
1. Single-point load cell
Structural features: only one force-bearing point, usually a small square or round load cell that bears force at the center.
Applicable capacity: mainly small capacity, generally 10 ~ 200 kg
Typical applications:
- Small bench scales and platform scales
- Checkweighers and packing scales
- Filling machines
- IVD equipment and laboratory weighing
Advantages: high accuracy, fast response, compact size Limitations: not suitable for large capacity or strong lateral force scenarios
How to choose: small capacity, high accuracy, dynamic weighing → single-point.
2. Cantilever beam load cell
Structural features: one end fixed, the other end bearing force, like a cantilevered beam that bends under load.
Applicable capacity: medium capacity, generally 10 ~ 500 kg
Typical applications:
- Hopper scales and batching systems
- Platform scales and belt scales
- Packing and filling machines
- Checkweighers
Advantages: wide capacity coverage, high accuracy, flexible installation, good eccentric-load resistance Limitations: has certain requirements for installation levelness
How to choose: medium capacity, multi-cell combined weighing → cantilever beam, the most versatile type.
3. Shear beam load cell
Structural features: produces shear deformation internally under load, with a rugged structure and strong resistance to lateral forces and overload.
Applicable capacity: large capacity, generally 200 kg to several tons
Typical applications:
- Reactor weighing
- Tank and silo weighing
- Truck scales
- Large platform scales
Advantages: overload resistance, lateral force resistance, vibration tolerance, suited to harsh environments Limitations: larger size, not suitable for small capacity
How to choose: large capacity, with agitation/vibration or lateral forces → shear beam.
4. Quick comparison of the three load cell types
| Comparison item | Single-point | Cantilever beam | Shear beam |
|---|
| Capacity | 10-200 kg | 10-500 kg | 200 kg - several tons |
| Structure | Single-point force | One end fixed | Shear force |
| Accuracy | High | High | High |
| Eccentric-load resistance | Fair | Strong | Strong |
| Overload resistance | Fair | Strong | Strong |
| Typical scenarios | Bench scales, checkweighers | Hopper scales, batching | Reactors, tanks |
5. Selection decision tree
What is your equipment's weighing range?
│
├─ Below 200 kg
│ ├─ Platform / bench / checkweigher → single-point (or cantilever beam)
│ └─ Hopper / batching / packing → cantilever beam
│
└─ Above 200 kg
├─ Tank / reactor / truck scale → shear beam
└─ Large platform / hopper → shear beam or cantilever beam (depending on structure)
6. Yuanli Sensing product mapping
| Type | Yuanli model | Capacity | Features |
|---|
| Single-point | YLA7 | 15-150 kg | High accuracy, IP67, benchmarked against HBM PW15B |
| Single-point | YLA9 | 10-100 kg | Food & pharmaceutical grade, IP68, benchmarked against HBM PW15AH |
| Cantilever beam | YLA6 | 10-500 kg | Full stainless steel IP68, benchmarked against HBM Z6 |
| Shear beam | YLA8 | 220-1760 kg | Welded sealed IP68, benchmarked against HBM HLCB1 |
Not sure which type your equipment needs? Welcome to consult — free selection assistance: 025-58178050.