Well-characterized induction systems that offer tightly regulated, graded, and homogeneous control of gene expression are essential tools for basic and applied microbiology. Tetracycline-based induction systems are widely used non-toxic expression systems in bacteria; however, the generally recognized as safe (GRAS) and industrially relevant model organism Bacillus subtilis currently lacks a tightly regulated, sensitive system that is robust to media and growth conditions. Here, we adapte