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C.1 specifications – Campbell Scientific 43347 RTD Temperature Probe and 43502 Aspirated Radiation Shield User Manual

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Appendix C. 43347 Aspirated Radiation Shield

The 43408 radiation shield employs concentric downward facing intake tubes
and a small canopy shade to isolate the temperature probe from direct and
indirect radiation. The 43347 temperature probe mounts vertically in the center
of the intake tubes.

A brushless 12 Vdc blower motor pulls ambient air into the shield and across
the temperature probe to reduce radiation errors. The blower operates off a 115
Vac/12 Vdc transformer that is included with the shield.

C.1 Specifications

43408 ASPIRATED RADIATION SHIELD:

DIMENSIONS:

Length: 44 in, extendable to 75 in
Diameter of Blower Housing: 6 in

AIR FLOW RATE:

3 to 7 m/s depending on sensor size

TEMPERATURE RANGE: ±50°C

POWER REQUIRED:

12 to 14 Vac @ 420 to 480 mA
115 Vac/12 Vdc - 800 mA transformer supplied

RADIATION ERROR:

< 0.2°C radiation @ 1100 W/m

2

irradiance

LIFE EXPECTANCY ON BLOWER:

80,000 hrs @ 25°C

43347 Temperature Probe
and Junction Box

Blower Housing

43408 Aspirated
Radiation Shield

FIGURE C-1. 43347 RTD Temperature Probe and 43408 Aspirated

Radiation Shield

C-2