Over time, a PFM-1S mine with a built-in self-destruct mechanism was developed, intended to detonate 40 hours after being armed. Read also: 3D printing pioneers revolutionizing Ukraine's defense ...

"The Ukrainian armed formations are scattering PFM-1 and PFM-1S (Lepestok) anti-personnel mines, using rocket artillery. Since July 30, field engineers of the DPR Emergencies Ministry have defused ...

There is also another version of this mine, known as PFM-1S, which is programmed for self-destruction after a specific time, usually after 40 hours. Butterfly mines can be dispersed using various ...