Blue Tree Systems Inc., a provider of reefer monitoring, trailer tracking, and in-cab fleet management solutions and ATDynamics Inc., a supplier of semi-trailer rear-drag aerodynamics technology, announced the availability of a modified door sensor to detect when a semi-trailer’s TrailerTail aerodynamic device is properly deployed by a driver.
 
The new sensor provides real-time reporting to confirm that the TrailerTail is deployed anytime the vehicle is moving at highway speeds.