Parabolic sensor When the zones to be controlled are more than 5 meters away, the parabola is the best suited sensor. To the contrary, its use is not recommended for short distance detection. Its sensitivity is better than the extended distance horn for long range, but especially its laser makes it possible to remotely locate the defective element precisely. For pricing, ordering and additional information, please contact Sales at (800) 867-1408 or Request a Quick Quote by using the tab on the top of our home page.