Tagged: System Sensor 2251B Replacement This topic has 1 reply, 2 voices, and was last updated 10 months, 2 weeks ago by Khris James. Viewing 2 posts - 1 through 2 (of 2 total) Author Posts January 10, 2024 at 12:04 pm #4710 Olivia ThompsonParticipant Hello, I have a System Sensor 2251B in my fire alarm system and I’m looking for a suitable replacement. Will the 2351B work as a replacement? Thanks! January 10, 2024 at 12:05 pm #4711 Khris JamesModerator Yes, the System Sensor 2351B is a suitable replacement for the 2251B in your fire alarm system. It’s compatible and will work seamlessly as a replacement. Let us know if you need any further assistance! Author Posts Viewing 2 posts - 1 through 2 (of 2 total) You must be logged in to reply to this topic. Log In Username: Password: Keep me signed in Log In