Miniature M8 (8mm) chrome plate nickel silver or chrome plated brass - DC
Miniature M8 (8mm) stainless steel - DC
8mm Round Metal DC Sensors
Cost-effective proximity switches for tight space applications.
V3E1 Series AC-powered, extended sensing
Testimonials for AES-AN-3F
Great proximity sensor for the cost. Review the docs closely if your target is other than steel, the detecting range falls off quickly for non-ferrous metals. It is well documented and I found it to be accurate.