Flame Sensors

Flame Sensors

Flame sensors are devices designed to detect the presence or absence of a flame in a combustion system. They are commonly used in industrial applications, such as furnaces, boilers, and gas turbines, to ensure safe and efficient operation of the equipment. Flame sensors work by detecting the ultraviolet (UV) or infrared (IR) radiation emitted by a flame. UV sensors are more commonly used in applications where the flame is small or difficult to detect, while IR sensors are used in larger flames. The basic principle of operation of a flame sensor is to detect the radiation emitted by a flame and convert it into an electrical signal. This signal is then used to control the combustion process, either by turning on or off the fuel supply, or by adjusting the air/fuel ratio to maintain optimal combustion conditions. Flame sensors are typically installed in the combustion chamber or in the flame path, and are connected to a control system that monitors the signal and takes appropriate action based on the detected flame status. There are several types of flame sensors available, including single rod, dual rod, and optical sensors. Single rod sensors are the simplest and most common type, consisting of a single metal rod that is inserted into the flame. Dual rod sensors use two rods, one of which is grounded, to detect the presence of a flame. Optical sensors use a light source and a detector to detect the presence of a flame, and are often used in applications where the flame is difficult to detect using other methods. In summary, flame sensors are essential components of combustion systems that ensure safe and efficient operation by detecting the presence or absence of a flame and controlling the combustion process accordingly.

combustion, industrial, UV, IR, control system

— Daniel White

CITATION : "Daniel White. 'Flame Sensors.' Design+Encyclopedia. https://design-encyclopedia.com/?E=343755 (Accessed on June 30, 2025)"