Features Waterproof, self-contained housing to ensure contaminate free monitoring Vented design Powered by 9-volt battery 103 decibel alarm siren Yellow LED low battery indicator light Audible low battery indicator chirp Switch for on/off/test PVC and ABS plastic construction Specifications Fits in 3/4" NPT vent opening UL Nitrile Rubber sensor High level actuation point = 3" Low level actuation point = 32" Advantages Simple installation Easy battery replacement Housing can be rotated for best viewing orientation Less expensive than comparable monitors 2+ year battery life Alarm sounds for 12+ hours
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