Although the 4903 and 4904 Notification Appliances meet the current UL standards for sound and/or light intensity, the protected areas may have walls, doors, carpeting, furniture, …

For applications requiring audible/visible (A/V) notification with horn tones, these Simplex 4903 series appliances combine a high intensity strobe with a low current electronic horn in a …

View and Download Simplex 4903 installation instructions manual online. Audible / Visible and Visible Units. 4903 fire alarms pdf manual download. Also for: 4904.

The 4903 Horn/Visible Units are Notification Appliances listed by Underwriters Laboratories (UL). Notification Appliances provide an audible and/or visible warning indication of an alarm …

The Simplex 4903-9253 is an Electronic Horn with Strobe. It has audible/visible notification appliances with efficient electronic horn and xenon strobe.

Simplex 4903-9153 Speaker/Strobe, Red, 15CD, Vertical Mount. Speaker/Visible (S/V) notification appliances combine a multi-tapped speaker and a high intensity strobe to provide audio/tone …

These covers are for use with Simplex® listed/approved audible, visible, or combination audible/visible notification appliances as a direct mechanical replacement for the cover …