ETAS provides two series of measurement modules (micro ES400 and compact ES600 modules) and the modular measurement boards of the ES1000 series for testing applications. The compact ES600 and the micro ES400 measurement modules are designed for road testing. The compact ES600 measurement modules are located in the passenger compartment or in the trunk of a vehicle. The very small and extra-robust ES400 micro measurement modules are deployed close to the measurement source. They are well suited for “under-the-hood” applications in a vehicle.