Schmersal Safety Switches and Controllers Neff Power is a stocking distributor for Schmersal Limit Switch and Controllers. Our staff is trained on all of Schmersal's products, and ready to help with your application. Schmersal is a complete line of industrial safety control products including Limit Switch, Safety Interlock Switch, E-Stop Pushbutton Stations, Magnet Sensors, Fail-to-Safe Devices, Positive-Break Switch, and Safety Controllers. Schmersal is the industry's authority on limit switches and controls. We can help you with replacement, maintenance, training, installation, operation, engineering and technical support. Use the links on the left to request a quotation or literature. To visit the Schmersal USA website, click here.