Multi Criteria Detector – LE-SLR-24H


  • Low profile, 2.2″ high (with base)
  • 2 or 4 wire base compatibility, relay bases available
  • 135°F Fixed Temperature heat sensor (Latching)
  • Heat sensor protected by a built-in guard
  • Highly stable operation, RF/Transient protection
  • Low standby current, 45μA at 24VDC
  • Two built-in power/sensitivity supervision/alarm LED’s
  • Non-directional smoke chamber
  • Vandal resistant security locking feature
  • Removable smoke labyrinth for cleaning or replacement
  • Automatic Sensitivity window verification function meets outlined requirements in NFPA72, Chapter 2 & 7, Inspection, Testing and Maintenance



The LE-SLR-24H Multi-criteria detector utilizes two bicolored LED’s for indication of status. In a normal standby condition the LED’s flash Green every 3 seconds. When the detector senses that its sensitivity has drifted outside the UL listed sensitivity window the LED’s will flash Red every 3 seconds. When the detector senses smoke and goes into alarm the status LED’s will latch on Red.