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SRI 1000, Portable Emissometer/Reflectometer and Solar Reflectometer for Terrestrial Applications

Note: For information on AZ's measurement services for reflectance, emittance and SRI toward LEED certification, see Optical Measurement Services.

TESA 2000 Portable Reflectometer/Emissometer and Solar Absorption/Reflectometer Set Up So Samples May Be Sat Atop Unit and Left While Repeated Measurements Are Taken
Lab setting where samples may be sat atop unit.
TESA 2000 Portable Reflectometer/Emissometer and Solar Absorption/Reflectometer in use
Portable usage with battery and satchel

AZ Technology's newly released SRI 1000 Portable Emissometer/Reflectometer and Solar Reflectometer, is compact, lightweight, rugged, and ergonomically engineered for ease of use in the field, the laboratory, or on the manufacturing line, to determine ambient temperature total thermal emittance and solar absorptance (at air mass 1.5) of test surfaces for terrestrial applications. These two measurements allow the calculation of the Solar Reflectance Index (SRI) as defined for environmental certifications such as Cool Roofs and LEED.

The SRI 1000 can be conveniently used in a laboratory or manufacturing setting (top right image) where samples can be sat atop the instrument and left while repeated measurements are being taken, or as a battery powered portable unit (bottom right image)

The SRI 1000 provides in a single unit:

1) A portable emissometer/reflectometer that performs optically integrated total hemispherical reflectance measurements from approximately 3 to 35 micrometers wavelength, yielding total hemispherical thermal emittance.

2) A portable solar reflectometer that performs optically integrated total hemispherical reflectance measurements at air mass 1.5.

These two measurements can be used as per ASTM E1980 to calculate the Solar Reflectance Index (SRI).

The instrument includes a rolling carrying case, 2 rechargeable batteries, battery charger, instrument inspection head, display unit, and an operator satchel for portable use.

Video on using the SRI 1000

The table below lists specifications for the SRI 1000.

Emittance wavelength range 3um to 35um
Solar reflectance wavelength range 250 to 2500 nm
Measurement accuracy Within 1 to 3 percent of full scale depending upon the material.*
Repeatability ± 1% of full scale or better
Material type Virtually any opaque material**
Sample size and geometry

-Greater than 0.5 inches (1.25 cm) diameter
-Flat or a moderate amount of curvature

Sample temperature Room Temperature, Ambient

-Digital LCD display
-Internal data storage, downloadable as .csv file.


-Optical Head: 5" diameter x 8" long
-Control and Display Unit: 7.5 x 5.5 x 3 inches
-Battery Box:6 x 3 0.75 inches

Weight -Optical Head: 6 pounds
-Control and Display Unit: 3.25 pounds
-Battery: 0.5 pounds
Warranty 1 year parts and labor

*Most natural and common materials are measured within ±2 percent.

**Materials that transmit light in the wavelengths of interest can be handled in some cases (instructions provided).


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