The ILUX hydrocarbon gas detector is an open path infrared gas
detection system that provides continuous monitoring of combustible hydrocarbon
gas concentrations in the range of 0 to 1,5 LEL/m, 0-2,5 LEL/m, 0-5 LEL/m, over
a distance of 5 to 200 meters. Standard system outputs include 4-20 mA DC
current output, with HART and RS-485 MODBUS communication. ILUX is capable of
detecting most hydrocarbon gases and vapors including methane, ethane, propane,
butane, propylene and others. No direct electrical interconnection between the
two modules is required. The application of the ILUX system is allows to substitute for up to 12 fixed gas detectors.
The ILUX system consists of two stainless steel modules- a transmitter and a
receiver, along with mounting fixture hardware. Both modules are powered from
an external 24 volt DC supply. The receiver provides the measurement signal
outputs, and is furnished with an onboard “status indication†LED and an
external magnetic bangle for reset setting and zero adjustment. The transmitter
contains one ultra-reliable xenon flash lamp. Both modules are installed of
approximately the same elevation and must be aligned to point directly at one
another. The ILUX transmitter module illuminates a direct linear path ending at
the ILUX receiver module. As flammable hydrocarbon gases intersect the light
beam between by the two modules, certain IR wavelengths are absorbed by the
gas, while other IR wavelengths are not. The amount of IR absorption is
determined by the concentration of the hydrocarbon gas. A pair of optical
detectors and associated electronics located in the receiver module measures
the absorption. The change in the intensity of the absorbed light (active
signal) is measured relative to the intensity of light at a non-absorbed
wavelength (reference signal). The microprocessor computes the gas
concentration and converts the value into a 4-20 mA current output signal
(digital signal), which is then communicated to external control and
annunciation systems. No filter wheel motors or other moving parts are utilized
in either module.
