Tension Load Cell: What It Is, How It Works, and When to Use It
A tension load cell is a sensor designed to measure pulling force, commonly referred to as tensile load. These devices are essential in crane lifting, rigging, manufacturing, aerospace testing, offshore operations, and any application where accurate tension measurement is required for safety and performance.
Tension load cells help operators understand how much force is being applied to cables, shackles, lifting points, spreader bars, and structural elements, ensuring operations remain safe and within safety limits.
How a Tension Load Cell Works
A tension load cell measures loads by converting force into an electrical signal through a strain gauge, which deforms slightly when tension is applied.
A basic tension load cell includes:
- Strain gauge assembly
- Load pin or tension body
- Electronics for signal amplification
- Wireless or wired communication output
The process:
- Tension is applied to the sensor.
- The sensor body elongates microscopically.
- Strain gauges detect this deformation.
- Electronics convert it to a digital or analog reading.
- The reading is displayed on a receiver or monitoring system.
Wireless tension load cells streamline this process by eliminating cables to allow for monitoring from a safe distance.
Types of Tension Load Cells
1. Dynamometers
Portable devices used for crane lifting, load testing, and rigging operations.
2. Tension Link Load Cells
Placed inline between lifting components such as hooks, shackles, and slings.
3. Wireless Tension Load Cells
Ideal for remote or hazardous environments, offering fast setup and long-range communication.
4. Multipoint Tension Sensors
Used in applications requiring simultaneous monitoring of multiple load points.
Eilon Engineering’s Ron series fall into these categories with a focus on reliability and safety.
When Should You Use a Tension Load Cell?
Tension load cells are essential when you need to:
✔ Monitor crane lifting loads
Ensures you never exceed rated capacity.
✔ Verify load distribution
Critical during multi-leg rigging and when lifting beams.
✔ Perform proof load testing
Used in certifying lifting components or structures.
✔ Prevent overload incidents
Real-time monitoring reduces risk of equipment damage.
✔ Validate engineering calculations
Ensures loads behave as expected in real-world conditions.
✔ Log lifting data for compliance
Required for critical lifts in many industries.
Wireless vs Wired Tension Load Cells
| Feature | Wireless | Wired |
|---|---|---|
| Setup time | Very fast | Medium |
| Cable risk | None | Possible failure |
| Range | Long distance | Limited |
| Multipoint support | Excellent | Limited |
| Safety | High (remote monitoring) | Medium |
| Mobility | High | Low |
Wireless tension load cells are preferred in:
- Cranes
- Offshore vessels
- Construction sites
- Entertainment rigging
- Operations requiring mobility
Key Features to Look For in a Tension Load Cell
Accuracy
Industrial lifting requires highly precise readings.
Safety factor
Choose sensors with a high safety factor to prevent failure.
Wireless range
Longer range reduces operator risk.
Battery life
Critical for field use.
Environmental rating
IP67 or higher preferred for outdoor work.
Integration
Ability to connect with multipoint load monitoring software applications.
Eilon Engineering Tension Load Cell Solutions
Eilon Engineering provides tension load cells designed for harsh industrial environments. Key advantages include:
- Extremely long battery life
- Lightweight yet robust construction
- High accuracy and low power consumption
- Long-range wireless communication
- Advanced multipoint load monitoring (Ron StageMaster & Ron Crane Master)
- Redundant, high-safety design
These features make Ron tension load cells ideal for critical lifts, heavy rigging, and industrial load measurement.
If you need help selecting the right tension load cell for your lifting application, get in touch and our engineering team will be happy to assist.
