Extended distance horn The extended distance horn is remarkable for its sensitivity: it is 20 times more sensitive than both the internal ultrasonic sensor and the flexible sensor. 20 more times represent a gain of 26 dBµV. Consequently, the extended distance horn should be used in priority and especially when leaks are going to be quite small (i.e. vacuum leak) or if you might be up to 5 meters away from the leak. However its use could be delicate for the zones with a difficult access. In the same way, the precise localization of the defective element could be arduous when controlling high density of pneumatic equipment. http://ludeca.com/prod_ultrasound-testing.php For pricing, ordering and additional information, please contact Sales at 951-249-3095 or by Requesting a Quote by using the tab at the top of our home page.