Do knives set off shop doorway alarms?

Has anyone had a shop doorway alarm set off by a knife in their pocket?
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    In Memoriam

    D ale

    ...  dale has magnets on the mind today   ...

     

    taint magnets Don ............................................ 'tis  Trents pic "157793"

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    In Memoriam

    D ale

    Don's absolutely correct .. The monitoring equip does NOT set up or generate a magnetic field ... that'd be as dangerous as transmitting microwave energy next to your brain (cell phone).

     

    The equip I'm aware of .. simply responds to a change in the flux lines .... like when a small magnet is passed through / within it's sensory range .....

     

    similar to .. but not the same as .... a simple metal detector. Now that pc of equip does set up it's own magnetic field & all the lil flux lines that go along w/ it .... in that application .... any "magnetic conductor" will affect the flux lines & set off the alarm ................................... pcs of 8 .. dig deep !!!!

    Don said:

    they don't use magnetic fields because of the public's health reasons. heart monitors and such are sensitive to magnetic fields, that's why they arnt used.

    Dale said:

    IF ... the door alarm in question is set up to detect a magnetic field (think wally-world)

    SUCH AS ... those little magnetized security strips inside the packaging (that's why they degauz 'em)

    AND ... the knife is magnetized

    THEN ... it's possible

     

    But I aint a clue on Don's door ?.!.?      

  • up

    stephen tungate

    if wally world had metal detector how come your keys does not make it go off? hummmm

    D ale said:

    Don's absolutely correct .. The monitoring equip does NOT set up or generate a magnetic field ... that'd be as dangerous as transmitting microwave energy next to your brain (cell phone).

     

    The equip I'm aware of .. simply responds to a change in the flux lines .... like when a small magnet is passed through / within it's sensory range .....

     

    similar to .. but not the same as .... a simple metal detector. Now that pc of equip does set up it's own magnetic field & all the lil flux lines that go along w/ it .... in that application .... any "magnetic conductor" will affect the flux lines & set off the alarm ................................... pcs of 8 .. dig deep !!!!

    Don said:

    they don't use magnetic fields because of the public's health reasons. heart monitors and such are sensitive to magnetic fields, that's why they arnt used.

    Dale said:

    IF ... the door alarm in question is set up to detect a magnetic field (think wally-world)

    SUCH AS ... those little magnetized security strips inside the packaging (that's why they degauz 'em)

    AND ... the knife is magnetized

    THEN ... it's possible

     

    But I aint a clue on Don's door ?.!.?