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Model OP121 is UL 268
The FSP-751T photo model includes a built-in thermal (heat) detection device
When an event occurs that controls the IDP-RELAY
Communication takes place over the power (+ and –) lines
NEW NOTIFIER FSP-951R-IV PHOTOELECTRIC SMOKE DETECTOR REMOTE TEST CAPABLE 2951TMJ Model OP121 is UL 268The Notifier FSP 951R IV Series intelligent plug in smoke detectors come designed for both performance and aesthetics and are direct replacements for the FSP 851 Series. Besides, a new modern, sleek, contemporary design and enhanced optical sensing chamber are engineered to sense smoke produced by a wide range of combustion sources in accordance with more stringent code standards. In fact, Each FSP 951R IV Series detector uses one of the panels
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