Simplex 4098-9701

TrueAlarm Photoelectric Sensor

  • Factory New
  • Material Obsolete
Brand: Simplex Part #: 4888 Categories: , Manufacturer Part #: 4098-9701 Tag:


TrueAlarm photoelectric sensors use a stable, pulsed LED light source and a silicon photodiode receiver to provide consistent and accurate smoke sensing with low power requirements. Seven levels of sensitivity are available for each individual sensor, ranging from 0.2% to 3.7% per foot of smoke obscuration. Sensitivity is monitored and selected at the fire alarm control panel. The sensor head design provides 360° smoke entry for optimum response to gray or black smoke from any direction. A built-in screen keeps insects from entering the smoke chamber. Due to its photoelectric operation, air velocity is not a factor, except as it affects area smoke flow.


Weight 0.25 lbs
Detection Method


Production Status




Product Notes

Replacement: Simplex 4098-9714


Communicating Devices; 4098 Series TrueAlarm® Bases, and Photoelectric, Ionization, & Heat Sensors
Simplex – Data Sheet

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