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3 1 D273 Photoelectric Smoke and Smoke and Heat Detectors <br /> D2731S Four-Wire Smoke Detector with Isolated Heat TP280 Trim Plate <br /> Sensor and Sounder For retrofit and remodeling purposes; 16.2 cm (6 in.) <br /> Four-wire smoke detector with an isolated 135OF diameter <br /> (57°C) heat sensor and a sounder. Order number TP280 <br /> Order number D2731S <br /> D273TH Four-Wire Smoke/Heat Detector <br /> Four-wire smoke detector with a 135'F (57'C) heat <br /> sensor. <br /> Order number D273TH <br /> D273THC Four-Wire Smoke/Heat Detector with Auxili- <br /> ary Relay <br /> Four-wire smoke detector with an isolated 135'F <br /> (57°C) heat sensor and an auxiliary relay. <br /> Order number D273THC <br /> D273THCS Four-Wire Smoke/Heat Detector with Auxili- <br /> ary Relay and Sounder <br /> Four-wire smoke detector with a 1350F (57'C) heat <br /> sensor, an auxiliary relay, and a sounder. <br /> Order number D273THCS <br /> D273THE Four-Wire Smoke/Heat Detector with EOL Re- <br /> lay <br /> Four-wire smoke detector with a 1350F (57'C) heat <br /> detector and an EOL relay. <br /> Order number D273THE <br /> D273THES Four-Wire Smoke/Heat Detector with EOL <br /> Relay and Sounder <br /> Four-wire smoke detector with a 135°F (57°C) heat <br /> sensor, a sounder, and an EOL relay. <br /> Order number D273THES <br /> D273THR Four-Wire Smoke/Heat Detector with Trouble <br /> Relay <br /> Four-wire smoke detector with a 1350F (57°C) heat <br /> sensor and a trouble relay. <br /> Order number D273THR <br /> D273THS Four-Wire Smoke/Heat Detector with Sounder <br /> Four-wire smoke detector with a 1350F (57°C) heat <br /> sensor and a sounder. <br /> Order number D273THS <br /> Accessories <br /> D275 Power Supervision Module <br /> Line supervision device for four-wire fire detection <br /> circuits <br /> Order number D275 <br /> D1005 Test Cable <br /> Connects a digital voltmeter to the detector's <br /> calibration pin for verifying that the detector is within <br /> its calibration range <br /> Order number D1005 <br /> DT-2 Detector Removal Tool <br /> Use the DT-2 to remove, replace, or test the detector <br /> head <br /> Order number DT-2 <br />