Product Details:
API with dual set points factory set @ high (132 vac) and low (108 vac). Direct reading. During normal operation, needle floats between red limit markers. If voltage dips or surges, contacts make to trip alarm. Requires 10-25ma flowing through relay contacts to activate "locking coil". See instructions for details. A suitable relay to be controlled by the contacts is our part number (KO) MB1199. 3-1/2" face, fits 2-5/8" hole. 2-1/4" deep.

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