How does flame sensor detect fire?

Within 3-4 milliseconds, ultraviolet flame sensors can detect explosions and fires by measuring the levels of radiation in the atmosphere (additional radiation is emitted at the moment of ignition). Other UV sources, such as lighting, arc welding and even sunlight can all trigger the sensor.

Where are fire flame detectors used?

Flame Detection Industrial and commercial applications include oil and gas pipelines, turbine enclosures, off-shore platforms, automotive manufacturing facilities, aircraft hangers, munitions plants, nuclear facilities, and many, many more.

What is the use of flame sensor?

A Flame sensor works to regulate the flow of gas entering your furnace and automatically shutting the gas valve down if the furnace does not light up. The purpose behind such working principle is to prevent built-up gas or catastrophic explosions.

What are the types of flame detectors?

There are four primary optical flame-sensing technologies in use today: ultraviolet (UV), ultraviolet/infrared (UV/IR), multi-spectrum infrared (MSIR), and visual flame imaging. They are all based on line-of-sight detection of radiation emitted in the UV, visible, and IR spectral bands by flames (see Figure 1).

What is flame detector sensor?

A flame detector is a sensor designed to detect and respond to the presence of a flame or fire, allowing flame detection. A flame detector can often respond faster and more accurately than a smoke or heat detector due to the mechanisms it uses to detect the flame.

How do gas detectors work?

It works by monitoring different gas levels in the air. These devices are generally battery operated and used for safety. Once they detect a higher than normal concentration of gas in the air, they warn people in the location through a series of really hard to miss audible beeps.

How do you test a flame detector?

– The portable flame sensor test unit should activate the flame detector at a distance of 3m within 20 seconds. – The detectors are fitted with internal IR LED’s that can be activated to optically test the detector. (The above tests apply to detectors at room temperature under normal factory lighting conditions.

How do furnace flame sensors work?

A furnace flame sensor works by detecting the presence of a flame within the furnace. As the gas valve opens to begin the combustion process, the current is sent out from the sensor in order to detect the presence of heat from a flame.

What can set off a gas detector?

Things That Trigger Carbon Monoxide Detectors

• Malfunctioning gas appliances – Any gas appliance can emit CO if it’s not getting the correct gas to air ratio.
• Air leaks – Ductwork leaks can pull CO into your home if you use any vented gas appliances, like a dryer, water heater or combustion furnace.

How do infrared gas detectors work?

Infrared emitters within the sensor each generate beams of IR light . Each beam is of equal intensity and is deflected by a mirror within the sensor on to a photo-receiver, which measures the level of IR received.

How do I know if my flame sensor is bad?

How do I know if my furnace flame sensor is bad?

1. Switch off the power to your furnace.
2. Close the gas valve.
3. Take out the mounting screw.
4. Carefully pull out the sensor.
5. Inspect the sensor: if the insulation is intact but appears sooty, burnt or slightly corroded, it might only require cleaning.