When it comes to precision measurement in motorsports, understanding sensor accuracy is essential. One important term you’ll see on spec sheets is “linearity” (or non-linearity), especially when evaluating linear travel sensors like shock travel or suspension position sensors.
So what exactly does linearity mean—and why should it matter for your setup?
What Is Linearity?
Linearity refers to how accurately a sensor’s output signal (voltage or current) tracks with the actual physical movement it’s measuring.
In a perfectly linear sensor, the output increases or decreases at a consistent rate as the sensor moves through its range. This means if the sensor moves halfway through its stroke, the output will also be exactly halfway between its minimum and maximum value.
What Is Non-Linearity?
Non-linearity is the deviation from that ideal straight-line behavior. It’s typically expressed as a percentage of the sensor’s full-scale range (FSR).
For example:
- A sensor with ±0.25% non-linearity on a 2-inch stroke would have a maximum deviation of ±0.005 inches from a perfect linear output. (show math formula for 0.25% of 2)
- That means that the sensor’s output will never exceed an error of 0.005 inches at any point during the 2 inch stroke.
Why Does Linearity Matter in Motorsports?
In performance applications like:
- Shock travel tuning
- Suspension setup
- Throttle or brake pedal position tracking
You need your sensor data to be accurate, predictable, and reliable across the full range of travel. Poor linearity can lead to incorrect calibration, inconsistent readings, and poor data quality.
This becomes especially critical when:
- You're analyzing race telemetry for tuning
- Your DAQ system relies on precise voltage-to-position translation
- You need repeatability run after run
The Sensor Connection's Advantage
Our Linear Variable Inductance Transducer (LVIT) shock travel sensors are designed with excellent linearity, typically better than ±0.25% of full scale. That means:
- More accurate data
- Better repeatability
- Easier calibration with your data acquisition system
And because we design and build these sensors in the USA, we ensure each one meets high-performance standards for vibration, temperature, and durability on and off the track.
Bottom Line: Linearity = Accuracy You Can Trust
If you're relying on your data to make critical tuning decisions, don't overlook linearity. A well-designed sensor with minimal non-linearity gives you cleaner data—and ultimately a more competitive edge.
Still have questions?
📞 Reach out to our team for expert advice or to request a custom solution for your vehicle or testing platform.