8
English
Product overview
Xgard IR
is an infrared gas detector, which is available in two versions for the detec
-
tion of :
•
Common hydrocarbon gases in the range 0-100%LEL.
•
Carbon dioxide in the range 0-2% volume or 0-5% volume.
Xgard IR
is a certified Flameproof (Exd) detector suitable for use in ATEX Zone 1, Zone
2, Zone 21 or Zone 22 hazardous areas.
UL certified versions are suitable for use in Division 1 or Division 2 areas.
Please refer to the certification label on the detector junction box to identify the type of
certification that relates to the product supplied. Hazardous area definitions are shown
in the Hazardous area classifications section on page 1.
Note: if no certification label is fitted to the junction box, the detector is not certi-
fied for use in hazardous areas.
Each version of
Xgard IR
is identified by a label fitted on the junction box body. Please
quote the ‘model number’, ‘gas range’ and ‘sensor type’ when contacting Crowcon for
advice or spares.
Product description
Xgard IR
comprises of a universal assembly to accommodate either HC or CO
2
IR gas
sensors. The assembly comprises five main parts; the junction box, junction box lid,
amplifier/terminal PCB, sensor PCB and sensor retainer. These are shown in exploded
form in Diagram 3 (see page 4).
A cover is fitted over the amplifier PCB to provide protection when the junction box is
opened. This cover is designed to allow access to all cable terminals, test points and
potentiometers without the need for removal.
The junction box is manufactured from corrosion resistant aluminium with a durable
polyester coating (stainless steel option is available). The junction box is supplied with
1 x M20, ½" or ¾" NPT cable gland entry, on the right hand side for customer use. The
junction box is suitable for fixing on the wall or ceiling using M6 or ¼" fixings. Cable
gland adaptors are available if required (see Spare parts and accessories section).
