(E)-4-Methyl-N′-(1-(pyridin-2-yl)ethylidene)benzenesulfonohydrazide (MPEBSH) was synthesized and used for Cd2+ sensors. Single-crystal X-Ray diffraction studies were proved the MPEBSH structures. Sensitive potential Cd2+ sensor by simple I-V method. Efficient cadmium cationic sensor for environmental toxins. Environmental safety.