First WIM System to Obtain OIML Certification

Kistler Lineas® strip sensors are now OIML-certified for low to medium-speed vehicle weighing

Winterthur, April 15, 2015 – Kistler is announcing that it has obtained the OIML R-134 certificate for its Weigh-In-Motion (WIM) system consisting of Lineas quartz WIM sensors and the Kistler WIM Data Logger. Kistler is the first WIM manufacturer to have received an OIML certificate for vehicle weighing with strip sensors from 3 to 65 km/h. As OIML R-134 is the international metrology standard for legal weighing applications, the certificate paves the way for the use of Kistler WIM systems in applications such as weight-based toll collection and automatic weight enforcement. Road concessionaries and toll road operators can upgrade existing manual toll collection solutions to free-flow automatic toll collection, allowing vehicles to pass their toll collection sites without stopping. Furthermore, governments in several countries are pushing ahead with automatic weight enforcement applications. OIML provides a sound basis for creating the necessary legal framework for these applications. Kistler’s OIML-certified, maintenance-free WIM systems are based on extremely durable quartz crystal sensors and can be integrated into any manual or automated weighing system.


Need for Legal Weighing Applications
For many years now, WIM systems have served as ‘preselection tools’ for weight enforcement and have delivered valuable traffic data. However, traditional WIM systems are not allowed to be used for legal weighing applications such as weight-based toll collection and automatic weight enforcement. As more and more road concessionaries and toll road operators wish to perform financial transactions (tolling) and governments push to implement automatic enforcement applications based on vehicle weight data, there has been an increasing demand for certified WIM systems, accredited according to international standards. Kistler is the first WIM manufacturer to have received the OIML R-134 certificate for vehicle weighing with strip sensors from 3 to 65 km/h. This certificate states that Kistler WIM systems based on maintenance-free Lineas® quartz WIM sensors and the Kistler WIM Data Logger can be used for legal weighing applications.


Weight-Based Toll Collection
Most concessionaries or toll road operators collecting weight-based toll fees operate manual toll collection systems. They typically use scales (vehicle or axle scales) which besides requiring a complex installation and frequent maintenance, are limited to low speed operation (typically 10 km/h). Kistler’s WIM system is not only able to precisely measure axle loads and vehicle weights from low to high speed, it is now also certified for legal applications from low to medium speed (3 to 65 km/h) with accuracy class 5 and class 10. This enables the automatic collection of weight-based toll fees without stopping vehicles at the booth. Operators and concessionaries can simply upgrade their manual toll collection system to Electronic Toll Collection (ETC), allowing vehicles to pass their toll collection sites without delay.


Automatic Weight Enforcement and Other Applications
Automatic weight enforcement aims to detect and pursue overloaded vehicles automatically by using a WIM system combined with a license plate recognition system. This requires a legal framework and the use of a certified WIM system. Obtaining an official certification for legal weighing applications can be a lengthy and costly process. Kistler’s OIML-certified WIM systems can help to accelerate the approval process. Other possible applications include not only toll collection and weight enforcement, but also for example weighing at ports, logistics terminals, and industrial or mining facilities. Thanks to the use of extremely durable quartz crystal sensors, Kistler’s WIM systems are maintenance-free, durable under any weather conditions and can be integrated into any overall solution both for low and high driving speeds.

Kistler will continue to push for technological advancement and to sell Weigh-In-Motion equipment through its strong and reliable network of system integrators. Please refer to for further information on Kistler’s WIM equipment.

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User Contact
David Cornu
Head of Road & Traffic
Phone +41 52 224 14 29
Email: david.cornu(at)

Media Contact
Tabea Zuberbühler
Media Coordination
Phone +41 52 224 12 74
Email: tabea.zuberbuehler(at)

Picture caption: The Kistler WIM Data Logger with the Lineas® quartz WIM sensors is now OIML-certified for low to medium-speed legal vehicle weighing.

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