... 1. We can supply two types of proximity switch: Shielded type and unshielded type. 2.,the detective distance widely 3,NPN,PNP Main ... picture are availableWith them3. Testing distance: In shield type: 12mm(LM38). In unshielded type: 17mm(LM35), 18mm(LM38), 20mm(LM40), 25mm ... : -25~+75 degree centigrade12. Material used for shell: ABS resin(LM35, LM38), Metal(LM40, LM480)13. Protection degree: IP67.