Measured Parameter Directional hemispherical reflectance (DHR)
Method Integrated total reflectance in a band for a given angle of incidence
Measured Value Absolute reflectance (ρ)
Calculated Value Directional thermal emissivity at 20°, directional thermal emissivity at 60°, hemispherical thermal emissivity
Wavelength Bands 1.5 ~ 2.0 / 2.0–3.5 / 3.0–4.0 / 4.5–5.0 / 5.0–8.0 / 8.0–12.0 / 10.5–21.0 µm
Angle of Incidence 20° or 60° from normal incidence °
Calibration Coupon Specular Gold
Accuracy ±0.005
Repeatability ±0.005 units
Beam Spot Size 15 mm diameter
Sample Size & Geometry Flat ≥ 0.5 in. diameter, Curved ±0.5 in. concave, ±12 in. concave
Warm Up Time 90 seconds
Time Between Measurements 2 seconds
Sample Temperature -90 ~ 90 °C (ambient or heated/cooled)
Operating Temp 0 ~ 40 °C
Storage Temp -25 ~ 70 °C
Run Time 2 hours on one battery; continuous operation after replacement
Power Source Rechargeable battery (NiMH)
Battery Recharge Time 1 hour
IR Source Kanthal filament operated at about 1000°C
Weight 4.7 lb
Form Factor 11.5H × 9.0W × 3.7D in (29.21 cm × 22.86 cm × 9.44 cm)
Operator Interface LCD touchscreen 1/4 VGA, trigger switch in handle
Diagnostics On-screen status and signal monitor, raw data export supported
Data Format Text or Excel readable data files
Data Storage Removable SanDisk (SD) card
ASTM Standard E1933
Export Control ECCN 3A999F