The MEL-8704-SDD Shadow Deviation Detector senses detection of a reflective or solid object that pass in front of the Mel Meter sensor. Range from 5' to 75' feet
Gear Images Mel8704 sdd 36
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Saint Michael the Archangel,
defend us in battle.
Be our protection
against the wickedness
and snares of the devil.
May God rebuke him,
we humbly pray;
and do Thou, O Prince
of the Heavenly Host
by the Power of God-
cast into hell,
satan and all the evil spirits,
who prowl about the world
seeking the ruins of souls