Concept And Safety; Irmax Concept - Crowcon IRmax Instructions D'installation, D'utilisation Et De Maintenance

Concept and safety

IRmax concept

IRmax is an ultra-compact infrared (IR) gas detector, which delivers rapid, fail-safe detection
of hydrocarbon gases and vapours.
Featuring dual-wavelength IR sensor technology in a rugged 316 stainless steel package,
IRmax is designed to operate in the harshest conditions. Unlike conventional IR gas detectors,
IRmax does not incorporate heaters to prevent condensation on windows and mirrors. The
S IR coating on optical components prevents condensation forming while the detector is
tay cl
operating.
IRmax is compatible with any 4-20mA control system, and can also be installed in an RS485
Modbus addressable network (see Section 7).
IRmax requires only 1 Watt of power, typically 75-90% lower than conventional IR gas detectors.
IRmax features a compact diffusion gas chamber, which in combination with an effective
weatherproof cap provides excellent speed of response. The weatherproof cap has been
designed using flow modelling software to enable remote gassing and calibration of the
IRmax without requiring a special calibration cap.
The IR Display makes it possible to monitor readings from the IRmax both locally and
remotely. An IR Display can be fitted directly to IRmax. Alternatively, IRmax may be
supplied with an Intrinsically Safe (IS) Barrier module attached. An IR Display can then
be connected to the IS Barrier Module via temporary or permanent cabling. The available
options are illustrated on Diagram 3, page 5.
For further information about other accessories for the IRmax see Diagram 3 on page 5 and
Section 5, page 16.
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Detecting Gas Saving Lives