System Sensor 22051E-26


Photoelectric Optical Smoke Sensor

Availability: Please Call for Availability

  • Factory New
Brand: System Sensor Part #: 149728 Categories: , Manufacturer Part #: 22051E-26


The 22051; photoelectric smoke detector has a completely new detection chamber design, the result of many years of research and design by System Sensor. This delivers improved responsiveness, reduced sensitivity changes caused by settling dust and reduced false alarms resulting from insect ingress and other debris. The plug-in unit uses sophisticated processing circuitry that incorporates smoothing filters to help eliminate transient environmental noise conditions that can be the cause of unwanted alarms. The devices are managed by embedded software running complex algorithms that further improve resilience to false alarms and improve detection speed.


Weight 0.22 lbs
Dimensions 4.00 × 4.00 × 2.05 in



System Sensor



Unit of Measurement

EA (Each)

Production Status



  • Includes Series 200 Advanced Protocol
  • Available with or without single pole short circuit isolation with status control through the Series 200 Advanced Protocol
  • Tri colour LED offering red, green and amber colours
  • Rotary decade address switches
  • Pure white colour to compliment modern buildings
  • 100% mechanical and electrical backwards compatibility
  • New Base design to compliment the detector

Photoelectric Smoke Detector; Model 22051E

System Sensor - Data Sheet