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51 Water Street, Watertown, MA 02172 USA
800-422-3006 • 617-923-9900 • Fax 617-923-9911
IRt/c Accessories
Up to 450°F (230°C), air alone can provide sufficient cooling with the Cooling Jacket Kit. As the Air Cooling
Chart illustrates, considerably less air is required to cool an IRt/c with a CJK-1 or CJK-2, than an IRt/c.5. For
this reason, the IRt/c is recommended for hot areas if it is possible to bring the sensor close to the target.
The air cooling chart extends above the recommended 450°F (230°C), and can be used there, but caution is
advised due to the possible effects of hot spots.
If air consumption is of concern, or if ambient temperatures are above 450°F (230°C), water cooling is recom-
mended. A small amount of purge air is also recommended when water cooling (see Tech Note #15).
Air pressure required to cool IRt/c with CJK-1 or
CJK-2 at various ambient temperatures,
compared
to requirement for IRt/c models with built-in
air cooling.
*All other IRt/c’s with built-in air cooling.
To estimate air flow requirements, select the
pressure required from the Air Cooling Chart, and
read air flow above.
IRt/c for Ambient >100
0
C Cooling Requirements
Air Flow Requirements
Air Cooling Chart
Ambient Temperature ( F)
(psig)
1
10
100
0
200
400
600
IRt/c.xxx*
CJK-1 or CJK-2
(kPa)
7
70
700
90
180°C
Chart applies to standard ovens. For
forced convection ovens, multiply air
pressure by 3, or add external sleeve
with insulating stagnant air gap.
Flow (SCFM)
Pressure
(psig)
0.001
0.01
0.1
1
10
100
1000
0.01
0.1
1
10
