This practical seat bar safety sensor suits mainstream skid steer loaders perfectly. It can accurately sense the lifting and lowering state of the safety seat bar in real use. It locks off improper startup operations effectively and greatly raise onsite operation safety levels. This part adopts stable internal sensing structure and fine waterproof treatment. It can keep steady working performance amid frequent shifting and bumpy working scenes. Made following original factory criteria, it owns stable induction effect, easy assembly and long usable cycle for routine vehicle repair.