Fire alarm device and method of fire detection

Fire detector device (1) for detecting fires and / or signs of fire in a monitored area with a camera device (2) for receiving image data in the monitoring area, and having an evaluation device (7) which is designed to detect by evaluation of the image data in a fire or fire characteristics, wherein the fire alarm device (1) is formed as a multi-criteria detector and at least one further sensor means (3, 12, 13, 14) for the fire detection characterized, in that the evaluation device (7) for adjusting the sensitivity of the camera device (2) or the evaluation and / or the sensor device (3) based on the sensor signals from the camera device (2) and / or the sensor device (3) is formed, wherein the adjustment is that the sensitivities of the other facilities to be increased upon exceeding a set limit value when one of the devices.