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Heat has always been very useful to man kind. One of the basic and
common ways to obtain heat is by burning combustible fuels. However,
such combustion must be controlled and safe. Safety of combustion is
ensured by monitoring flame. Flame is characterized by emission of wide
spectrum of electromagnetic radiation starting from infra red, visible
light to ultra-violet radiations. Flame is also known to generate ions
in its envelope. Type of fuel and that of burner decides which one of
these radiations predominate. For example; flame of coal or oil is
usually very bright and yellow in color, flame of light oil like
kerosene or that of hydrocarbon gas is light blue and flames of some
gases may be even dull reddish. In addition to this, intensity of flame
could differ widely depending on the type and size of flame. Hence
different techniques have evolved and new ones are being developed to
detect and monitor flames. DILIGENT MICRO CONTROLS has developed wide
range of flame monitors “Diligent Flameye”.
1. Flameye PR for Oil Flame
Diligent Flameye PR is flame monitor designed to work with Photo Resistor
type flame sensor which respond efficiently to the bright yellow light.
Such light is emitted by oil flame and, therefore, Diligent Flameye PR is used in most of the oil burners.
2. Flameye PV for Oil Flame
Diligent Flameye PV is flame monitor designed to work with Photo Voltaic
type flame sensor which respond efficiently to the bright yellow light
by producing active dc milli volt signal. Such light is emitted by oil
flame and, therefore, Diligent Flameye PV is used in the oil burners.
3. Flameye IR (Infra Red) for Coal, Oil & Gas flames.
Diligent
Flameye IR is flame monitor designed to work with Infra Red type flame
sensor which respond efficiently to the infra red electromagnetic
radiations present in the flame. Infra Red radiations are also given
out by hot surface such as hot refractory lining in furnace. However, Diligent Flameye IR
effectively detects flame by picking up the fluctuating infra red flux
that is present only in flame. It uses infra red sensor type IRD 1010
of Satronics ( now Honeywell) make.
4. Flameye UV (Ultra Violet) for Oil & Gas flame.
Diligent Flameye UV is flame monitor designed to work with Ultra Violet
type flame sensor which respond efficiently to the ultra violet
electromagnetic radiations present in the flame. Ultra violet
electromagnetic radiations are given out by all the combustion process.
However, Diligent Flameye UV effectively detects flame by picking up the ultra violet flux that is present in the flame. It uses ultra violet sensor type QRA-2
of Landis & Gyr (now Siemens) make. Diligent Flameye UV models are
also available for working with other types of UV flame sensors such as
C7027 of Honeywell make, UV2 of Fireye make, Kromshrodder make, etc.
5. Flameye N (Ionisation) for gas flame.
Diligent
Flameye N is flame monitor designed to detect the flame by picking up
ions which are present in the flame. Gas flame, unlike oil flame, is
blue and is nearly not detectable by conventional sensors like Photo
Resistor or Photo Voltaic sensors. Such flame is easily and effectively
detected by picking up ions present in it. The only condition for
reliable sensing of flame by this is that the flame must be properly
set & stable to ensure unbroken path of ionic current.
6. Dual Flameye UI (UV & IR) or UU (UV & UV)
Diligent Dual Flameye are designed to sense same flame by two
independent sensors and flame presence decision is confirmed either by
AND or OR logic of two flame. Such flame monitors are vary useful, when
the operating ever changing environment renders one technique non
operational for some time. These are also useful when two independent
burners are fired in common chamber and operation require that both
burners be switched off if either of the flame is lost or security
fails.
7. Flameye with Flame-ON or -OFF Delay
Diligent
Flameye is also available with fixed or variable delay for Flame ON or
Flame OFF response. This is very useful when flame is not steady or
inherently obscured by the environmental conditions; such as Flare
Tower flame monitoring..
8. Flameye as Import Substitute for most of the popular types.
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