Castell Safety International has
launched an improved padlock differ
recording database for its Iso-Lok
range of lockout tagout (LOTO)
products. The Iso-Lok padlock range
is designed to uphold the integrity of
the user’s LOTO safety system by
guaranteeing that each padlock on
any one site is unique – that each
one ‘differs’ from the others so that it
can only be unlocked by the specific
key meant for it. This is achieved by
supplying each padlock with a
distinct barrel which has a differ (key)
number associated with that barrel.

Every differ number is stored on
the Iso-Lok database, referenced
against the customer and the site it
was delivered to. This enables the
company to reliably identify differs
previously supplied and prevent any
duplication.