Contrinex Inc. (www.contrinex.com) has developed inductive proximity sensors that are designed to resist the electromagnetic field interference that robots are subjected to during induction welding and hardfacing applications, while also withstanding damage from weld spatter. The company says the operating status of its sensors will not change when they are subjected to the intense levels of RFI created during the welding process. The sensors have copper-zinc alloy bodies that are sealed to IP67 standards, and are covered with a non-stick coating to withstand spatter. The company says the coating also enhances resistance to electromagnetic field interference. Formats include M12, M18, M30, and 40 mm by 40 mm cubic (C44) (about 1.57 in. by 1.57 in.).