Mrk engineers provides button type sensors. These will replace imported button type sensors. For detecting the presence of a wide range of metallic targets, a small miniature sensor provides an excellent means for detecting the presence of a wide range of metallic targets. This detection is accomplished without contacting the target and is mechanically wear free. The features include: very small in size with sensing ranges available up to 5 mm; and, available in npn or pnp dc 10-30 v and various other configurations.