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Series 302 heat detectors are designed for use in normal environments as well as environments where the detectors are subject to weather, moisture (internal condensation), and explosive atmospheres. They are normally-open devices designed to close an electrical circuit upon activation.  All models feature rate compensation. The 302-ET-194 is available with a 194&#176;F (90&#176;C) fixed temperature rating. It is an all-weather heat detector with plastic hexagonal grip bushing with 1/2" conduit threads for attachment to threaded hub cover, or any outlet box. For indoor or outdoor use when watertight seal is required, use weatherproof box. Requires STONCO27 or equivalent. The detectors are self-restoring, hermetically sealed, shock and corrosion resistant, and are tamperproof.<br><br>

Edwards Signaling All Weather Heat Detector - Explosion Proof Mounting

302-et-194-all-weather-heat-detector-explosionproof-mounting-not-fm-approved

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