EKO INSTRUMENTS CO., LTD. - Pyranometer MS-60/60S - Instruction Manual Ver. 4
Pg. 10
5. Getting Started
5 - 1 . P a r ts D e s c r i p t i o n s
Each part name and its main function is described below.
Parts Name
A. [Inner, Outer] Glass Dome
B. Detector
C. Body
D. Leveling Screw
E. Cable, Connector
F. Spirit level
G. Silica-gel
H. Sunscreen
Figure 5-1. Pyranometer Parts Name
1. Inner and Outer Glass Domes
2 glass domes create a sealed environment for the detector and protects it against the dirt, rain and wind.
Besides the mechanical protection, the optical properties of the glass domes minimize the undesired
influence of long wave radiation on the shortwave radiation: the domes of the EKO pyranometers are only
transparent for radiation emitted by the sun. Hence they block the undesired infrared radiation emitted by the
Earth’s atmosphere. The glass domes of all EKO thermopile pyranometers permit to measure the
cosine-weighted global solar irradiance over the entire hemisphere, i.e. with a field-of-view of 180 degree.
2. Detector
Thermopile, which generates voltage proportional to temperature difference [Seebeck Effect], is used for the
detector. When light is irradiated on the sensor, temperature of the detector increases; creating the
temperature difference at cold junction [body part] will generate electromotive force on the thermopile. The
pyranometer will output this electromotive force as voltage, and by measuring this voltage to determine the
solar irradiance. The thermopile detector, which is the heart of the sensor, determines the majority of the
measurement properties [e.g. response time, zero offset B, non-linearity, sensitivity, etc.]. EKO thermopile
detectors are very stable in time due to the black absorber material, which has high absorption and no
wavelength dependency is used on the detector surface.
E
F
D
A
B
C
G
H
Table 5-1. Parts Name