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 multicriteria detector that responds quickly to real fires while rejecting nuisance alarms. The detector can also adjust its sensitivity according to its environment. Using advanced software, Acclimate continuously samples the air in the environment and adjusts its detection parameters and alarm threshold accordingly. It does this automatically without user intervention. According to the manufacturer, an installer does not need to set sensitivity levels at the control panel, rather Acclimate makes the educated decisions.