Electrical design: NPN; Output function: normally open; Sensing range: 3 mm; Housing: Threaded type; Special feature: gold-plated contacts; Increased sensing range; Operating voltage: 10...30 DC V; Current consumption: < 20 mA; Protection class: III. Dimensions: 30 x 8 x 1 mm. Weight: 0.013 kg. Manufacturer reference: https://www.ifm.com/us/en/product/IES219