A flame rod is a simple piece of heat-resistant metal (nichrome, inconel, etc) in contact with a flame. A flame consists of ionized particles undergoing chemical reactions and therefore is conductive. The flame rod takes advantage of that fact. The rod has a small potential on it and when the flame touches it, a small current flows from the rod through the flame to ground. This current is detected and uses to "prove" the flame. A flame acts as a diode but I don't recall the direction of electron flow and that effect isn't used in this application. The rod's response is instantaneous. That, and there being nothing to degrade, are the two main benefits. The major detraction is that active, powered electronics are needed to process the signal. All pilotless gas systems use flame rods. If the ignition system is by spark then the flame rod and the ignition rod may be the same. Other systems use separate spark and flame rods. Yet other ignition systems such as the hot body ignitor don't involve the use of sparks at all. A similar application is the pilot light sustainer. This little gadget detects when the pilot light goes out and sparks to relight it.
The flame test is not used to detect magnesium; a magnesium oxide rod is used as a support for the solutions of other elements in the flame test.
Metals generally exhibit good thermal conductivity. When one end of the metal rod is held in the flame it absorbs thermal energy and becomes hot. Thermal energy is conducted quickly along the material (from hotter to cooler parts of the rod), and the other end eventually becomes hot. This principal is used in cooling systems for electronics (for example) with heat sinks drawing thermal energy away from hot components in order to radiate it elsewhere.
flame screen , flame arrest-er, co2 of N2 line , NVR ball v/v, manual v/v, lightning rod for grounding ...
E. coli have a rod shape and are gram negative.
The main circuit board in your furnace sends a small ac signal to the flame rod so now you have an ac potential from the body of the furnace to the flame rod, When the flame comes on between the body of the furnace and the rod it rectifies the ac in to dc, The flame actually acts like a diode. When this dc voltage is sensed by the control board it knows there is a flame present and thus keeps the gas valve on. Hope this helps
A flame rod is a simple piece of heat-resistant metal (nichrome, inconel, etc) in contact with a flame. A flame consists of ionized particles undergoing chemical reactions and therefore is conductive. The flame rod takes advantage of that fact. The rod has a small potential on it and when the flame touches it, a small current flows from the rod through the flame to ground. This current is detected and uses to "prove" the flame. A flame acts as a diode but I don't recall the direction of electron flow and that effect isn't used in this application. The rod's response is instantaneous. That, and there being nothing to degrade, are the two main benefits. The major detraction is that active, powered electronics are needed to process the signal. All pilotless gas systems use flame rods. If the ignition system is by spark then the flame rod and the ignition rod may be the same. Other systems use separate spark and flame rods. Yet other ignition systems such as the hot body ignitor don't involve the use of sparks at all. A similar application is the pilot light sustainer. This little gadget detects when the pilot light goes out and sparks to relight it.
The flame test is not used to detect magnesium; a magnesium oxide rod is used as a support for the solutions of other elements in the flame test.
Abby drives a flame red 1931 Ford Coupe hot rod.
Sodium of course...
Because heat travels "up." I disagree. Heat travels "up" in a fluid, because the molecules expand and become lighter and "float" upwards. But in a solid? How can that be? If you notice, the question is asking about a rod being pointed down into a FLAME versus up. As we all know, flames "point" up, not down. Therefore it is hottest at the tip of the flame. This should answer the question. If not...feel free to message me.
A ceramic rod is in some heaters that glow red in the flame. It uses coal so like a radiator! thanks for asking this question! I know everything! :)
An oxidizing flame is used in Braze welding. Not to be confused with Brazing, Braze welding uses bronze filler rod in a similar manner to fusion welding.
Metals generally exhibit good thermal conductivity. When one end of the metal rod is held in the flame it absorbs thermal energy and becomes hot. Thermal energy is conducted quickly along the material (from hotter to cooler parts of the rod), and the other end eventually becomes hot. This principal is used in cooling systems for electronics (for example) with heat sinks drawing thermal energy away from hot components in order to radiate it elsewhere.
flame screen , flame arrest-er, co2 of N2 line , NVR ball v/v, manual v/v, lightning rod for grounding ...
check your flame sensor
E. coli have a rod shape and are gram negative.