System Sensor 2251TMB

Acclimate multi-criteria smoke detector

  • Factory New
  • Material Obsolete
Brand: System Sensor Part #: 47941 Categories: , Manufacturer Part #: 2251TMB


200 Series smoke detectors are intelligent (addressable) detectors with point ID capability that enable each detector address to be set with decade address switches to provide exact detector locations. The sensitivity of 200 Series detectors can be programmed using the control panel software to suit the environment. In addition, detector sensitivity is continually monitored and reported to the panel.

The Acclimate® 2251TMB photoelectric detector includes thermal detection at 135°F. It uses advanced onboard software to combine the signals from the photo and thermal elements to create a true multi-criteria detector capable of rejecting nuisance sources, but still responding quickly to real fires. Separate photo and thermal elements also allow the Acclimate detector to provide different responses to smoke or heat. In addition, the Acclimate detector can adjust its sensitivity according to its environment.


Weight 0.2 lbs

Rotary Dials

Detection Method

Fixed Temperature, Photoelectric


Thermal Rating





System Sensor

Production Status



  • Sleek, low-profile design
  • Analog communications
  • Low standby current
  • Rotary address switches
  • Superior EMI protection
  • Dual LEDs for 360° visibility

200 Series: Intelligent Low-Profile Plug-In Detectors

System Sensor - Data Sheet

2251B, 2251TB and 2251TMB Intelligent Photoelectric Smoke Sensors

System Sensor - Installation Manual