Hemispherical Emissometer (D&S AERD)

Rapidly measures the emissivity of various solid surfaces.
Hemispherical emittance: The ratio of the radiant exitance of a thermal radiator in the hemispherical direction to that of a full radiator (blackbody) at the same temperature.
Principle: The thermopile inside the detector is heated to create a temperature difference between the detector and the sample plate. This temperature difference has a linear relationship with the emissivity of the sample plate. By comparing the temperature differences between high and low emissivity standard plates and the sample surface, the emissivity of the sample plate is determined.

ASTM C1371-15(2022) Standard Test Method for Determination of Emittance of Materials Near Room Temperature Using Portable Emissometers.
GB/T 25261-2018 Reflective thermal insulation coatings for buildings (hemispherical emissivity).
GB/T 31389-2015 Technical requirements and evaluation methods for heat-reflective materials used in building exterior walls and roofs (determination of hemispherical emissivity - radiometer method).
HG/T 4341-2012 Heat-reflective thermal insulation coatings for metal surfaces (hemispherical emissivity).
JG/T 235-2014 Reflective thermal insulation coatings for buildings (determination of hemispherical emissivity - radiometer method).
JG/T 375-2012 Acrylic high-elastic waterproof coatings for metal roofs (determination of hemispherical emissivity).
JC/T 1040-2020 Heat-reflective thermal insulation coatings for building exteriors (determination of hemispherical emissivity - radiometer method).

Main features of the Hemispherical Emissometer (D&S AERD):

1. Digital display of emissivity, ranging from 0.01 to 1.00, with repeatability of ±0.01.
2. Short measurement time (approximately 15 seconds).
3. Low cost and easy operation.

Technical parameters of the Hemispherical Emissometer (D&S AERD):

Detector section:
Measurement wavelength: 3–30 μm.
Repeatability: ±0.01 emissivity units.
Output: approximately 2.5 mV.
Response time: approximately 10 seconds.
Power supply: AC 100–240 V.

Main unit section:
Accuracy: ±0.3% of displayed value.
Ambient temperature: -10 to 40°C.
Dimensions: 80(W) x 152(D) x 51(H) mm.
Power supply: DC 9V.
Weight: approximately 370 grams.