When the mine is deployed with the chemical fuze it is very difficult to detect because the only metal in the mine is the detonator capsule. There is a secondary fuze well on the bottom of the mine that can accept a fuze allowing remote command detonation of the mine.
The mine becomes hard to find when equipped with a chemical fuse; the only metallic component is the detonator capsule.  A secondary fuse, located on the bottom of the mine, allows for remote detonation via an additional detonator.