The M28 simulates the presence, or absence, of G- or V-type nerve agents only.
Tests are carried out by following the simple instructions printed on
the inside of the box and on sampler packets.
The M28 Trainer Kit includes a corrugated box containing the simulators, one book of
M8 Paper sealed in a plastic bag, 18 individually-wrapped, nerve agent sampler detectors, and 18 individually-wrapped, blank nerve agent sampler detectors.
Other training kits include the M29, which simulates blister agents only, and the
M256A1 Trainer which simulates blood, blister, and nerve agents.