NOTIFIER FSI-851 Fire Alarm Sensor – Brand New – Intelligent Addressable

Straight from the factory, this NOTIFIER FSI-851 is a brand new fire alarm sensor.

It's the real deal—genuine NOTIFIER, not some knockoff.

Model number FSI-851, still sealed in the original packaging.

If you're maintaining or upgrading a commercial fire alarm system, this is the exact head you need.

Works with compatible NOTIFIER panels.

No damage, no scuffs, just fresh stock ready to install.

Don't risk using old or used detectors—grab a new one and sleep better knowing your system's good.