Scientific Validation of Strain Gauge Strip Sensors’ Superior Stability Over Time

Category: ITS/Enforcement

May 1, 2025

A study published in Sensors (December 2024) by Rygua et al. analyzed the long-term stability of Strain Gauge Strip Sensors for high-speed WIM over a three-year period (2022–2024). This peer-reviewed article included Intercomp's own Strain Gauge Strip Sensors, and confirmed that strain gauge strip sensors maintain exceptional accuracy over extended operational periods, leading to lower maintenance costs and improved overall WIM performance.

The research focused on: the effect of prolonged use without calibration on weight measurement precision; the long-term accuracy of axle load and gross vehicle weight readings; and the impact of road surface changes (e.g., rut depth) on sensor performance.

Despite the absence of site calibration over the three-year period, the study found only minor variations in sensor readings. The strain gauge sensors continued to meet class B+(7) using a 2-sensor layout, ensuring that total weight measurement errors remained below 7% according to COST323 standard.

With proven long-term accuracy, minimal recalibration requirements, and robust performance across diverse conditions, these sensors present an optimal choice for high-quality traffic data collection and vehicle overload enforcement systems. Intercomp's Strain Gauge Strip Sensors are industry-leading, known for their high accuracy, stability, and longevity.
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