Wireless Passive Infrared Detector

Availability: In Stock + Express Shipping Options

  • Factory New
Brand: DSC FireAlarm.com Part #: M03C-5149 Categories: , , Manufacturer Part #: WS4904P


Among the most technologically advanced detectors available, the WS4904 achieves superior detection and false alarm prevention through digital signal analysis. Digital information is more accurately analyzed using software and is not subject to signal degradation caused by amplification, noise, distortion or signal clipping. The detector’s technology adapts to changing environmental conditions by adjusting critical detection parameters to provide improved consistency of detection over all temperature ranges. Pet owners looking to be protected from false alarms can choose the WS4904P model version, a detector that is immune from pets weighing up to 60 lbs (27 kg).


Weight 0.4 lbs
Dimensions 2.12 × 2.5 × 4.25 in




Production Status



  • Reliable 433 MHz technology
  • WS4904P model version provides pet immunity up to 60 lbs (27 kg)
  • Digital signal analysis for consistent detection throughout the coverage pattern
  • Exceptional catch performance at elevated temperatures
  • Patented Multi-Level Signal Processing (MLSP) for accurate detection of human IR energy over a broad range of temperatures
  • High-traffic shutdown
  • Temperature compensation
  • 1 long-life lithium battery included; capable of up to 9 years of battery life
  • Sensitivity adjustment to configure the detector for “normal” (high sensitivity) or “hostile” (low sensitivity) environments


Wireless Passive Infrared Detector WS4904
DSC – Data Sheet
WS4904P – Installation Instructions
DSC – Installation Instructions