  Neutrino masses and dark matter (DM) might have a common origin. The
scotogenic model can be considered the proto-type model realizing this idea,
but many other variants exist. In this paper we explore the phenomemology of a
particular DM neutrino mass model, containing a triplet scalar. We calculate
the relic density and check for constraints from direct detection experiments.
The parameter space of the model, allowed by these constraints, contains
typically a long-lived or quasi-stable doubly charged scalar, that can be
searched for at the LHC. We reinterpret existing searches to derive limits on
the masses of the scalars of the model and estimate future sensitivities in the
high-luminosity phase of the LHC. The searches we discuss can serve to
constrain also many other 1-loop neutrino mass models.
