Length-adjustable three-redundancy rotating speed sensor

The invention provides a length-adjustable three-redundancy rotating speed sensor. The rotating speed sensor is provided with three completely independent test probes, and when one path or two paths of signals are damaged, the product can still output rotating speed signals normally. Proper length adjustment can be carried out on the product in the axial direction to be matched with a system structure for installation, and the product can also be designed into different lengths according to actual conditions to meet different installation requirements. The product is mainly composed of a probe assembly, a connecting assembly and a mounting assembly, is of an integral sealing structure welded by stainless steel, and has good electromagnetic shielding performance. A pin is arranged at the installation assembly and can serve as a product anti-reverse-installation mark. A rubber vibration damper of the connecting assembly has a product radial vibration damping function, and a spring of the mounting assembly has a