XCMG Spare: Reverse Buzzer 803502623 | Host Reverse Safety Warning Device

A reverse buzzer (also called backup alarm, reverse horn, or reverse warning sound) is the basic sounding device in a construction machinery reverse safety warning system. When the host machine is shifted into reverse gear, it emits periodic sound (typically a continuous "beep-beep-beep") to warn pedestrians and vehicles behind to keep clear—an indispensable safety feature for loaders, road rollers, motor graders, excavators, and other construction machines during reversing, turning, and confined-site operations. Its function is "warning and reminding"—when the host reverses, it alerts the rear of dangerous distances to avoid collision accidents .

Product structure and development trends:

Construction machinery reverse buzzers follow several technical routes, which must be distinguished when ordering and replacing:

• Electromagnetic buzzer: Uses an electromagnetic coil to drive a diaphragm to produce sound—simple structure, low cost, and the traditional mainstream solution for construction machinery reverse warnings.

• Piezoelectric buzzer: A piezoelectric ceramic disc deforms under alternating electric field to drive the diaphragm; low power consumption, long life, good weather resistance, and gradually replacing electromagnetic types as the preferred solution for next-generation construction machinery reverse buzzers .