New 2PC Siemens OH121 Multi-Conventional Photo Smoke/ Thermal Detector New 2 PC Siemens OH121 Multi-Conventional Photo Smoke/ Thermal Detector New - Same Day Ship The Siemens OH121 is a multi-conventional photoelectric and thermal smoke detector designed for reliable fire detection in commercial and industrial environments. It uses advanced optical sensing technology combined with a thermal sensor to detect both slow-smoldering and fast-flaming fires. This detector features intelligent signal processing to reduce false alarms caused by dust, steam, or ambient air changes. With a sleek, low-profile design, the OH121 is compatible with standard bases and is ideal for retrofits or new installations requiring high-performance detection. Listed by: Vienna (Sales Team) ?There are so many great things in life; why dwell on negativity?? ?Zendaya (A positive moment brought to you by Help Resale) About Us Welcome to Help Resale, your go-to consignment shop where value meets quality. At Help Resale, we're dedicated to providing you with an exceptional shopping experience, whether you're looking to find the best deals or consign your items. Need to buy a product, but don't see it in our store? Please feel free to reach out to us and we will help you find it! Help Resale 7200 Fair Oaks Blvd Suite 120 Carmichael CA 95608 Business Hours: Monday-Friday: 9:00 am to 5:00 pm (PST) All product and company names are trademarks TM or registered trademarks of their respective holders. Use of them does not imply any affiliation with or endorsement by them. (description exceeds maximum possible length)