1. We can supply two types of proximity switch: Shielded type and unshielded type. 2.,the detective distance widely 3,NPN,PNP Main Feature: 1. We can supply two types of proximity switch: Shielded type and unshielded type. Just LM38 is available with two type, others is only available with unshielded type shown on the picture2. Power voltage and output type: DC6~36V(NPN, PNP, DC two line) andAC ...