Hochiki SPC-24


Projected Beam Smoke Detector

Availability: In Stock

  • Factory New
Brand: Hochiki FireAlarm.com Part #: 52170 Categories: , Manufacturer Part #: SPC-24Secondary Part #: 0200-03460


The Hochiki SPC-24 Projected Beam Smoke Detector consists of an emitter and receiver. The SPC-24 detector should be placed so that smoke generated by a fire will likely rise into the path of the beam. The receiver is constantly monitoring and measuring the intensity of the beam transmitted by the emitter. Should the smoke from a fire cause a decrease in the signal strength of a magnitude that exceeds the programmed obscuration setting, an alarm signal is generated.


Weight 0.8 lbs
Dimensions 3.20 × 4.00 × 5.50 in




Production Status



  • Microprocessor based for reliability
  • Simple setup and alignment with signal strength LEDs
  • Provides 60 feet on center linear protection at a range of 32.8 feet to 328 feet
  • Automatic compensation for signal drift or dirty lens
  • Three field adjustable sensitivity settings
  • Form A alarm and Form B trouble contacts
  • Calibrated filters available to verify sensitivity (purchased separately)
  • Color-coded emitter (red) and receiver (green) labels for easy recognition
  • Adjustable to one of the three obscuration settings of 25%, 50% or 70% per span
  • Voltage and RF transient protection
  • External red LED when alarm condition is indicated


SPC-24 Projected Beam Smoke Detector
Hochiki – Data Sheet
Installation Procedure for SPC-24
Hochiki – Installation Instructions