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SYSTEM SENSOR 4WTA-B 4WTAB 12/24 VDC, Photoelectric Smoke Detector with Thermal, Sounder, and Base - Smoke Detectors - Amazon.com
![System Sensor 4WTA-B Photoelectric i3 smoke detector is a 4-wire, photoelectric i3 smoke detector with thermal sensor and built-in sounder. System Sensor 4WTA-B Photoelectric i3 smoke detector is a 4-wire, photoelectric i3 smoke detector with thermal sensor and built-in sounder.](https://www.bsasi.com/media/catalog/product/cache/0f4a8e197b98b783479fbfa854d2ea11/2/w/2wta-b_4wta-b_4wtar-b_4witar-b_ceiling_4.png)
System Sensor 4WTA-B Photoelectric i3 smoke detector is a 4-wire, photoelectric i3 smoke detector with thermal sensor and built-in sounder.
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System Sensor 4WTR-B Photoelectric i3 Series Smoke Detector, 4-Wire, Thermal Sensor, Form C Relay (4WTR-B )
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4WT-B - Honeywell System Sensor Hardwired Conventional 4-Wire i3 Photoelectric Smoke Detector (w/Thermal Sensing)
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System Sensor 4WT-B 4-wire, photoelectric i3 smoke detector with a 135 Degree fixed thermal sensor: Amazon.com: Tools & Home Improvement
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