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Salient Features:
Bellstone Actinograph is used to provide a continuous record of the intensity of the sun and sky radiation. Two black bimetallic strips and two white bimetallic strips are attached to a common coupling.The white bimetallic strips reflect the radiation from the sun, black bimetallic strips absorb it. So the temperature of the black bimetallic strips rise and they bend.
The intensity of solar radiation can result from the difference of this deflection on each bimetallic strips.
The glass hemisphere which covers the bimetallic sensors will transmit about 90% of the wavelength of electro-magnetic energy between 0.36 and 2.0 microns. This instrument is completely self-contained and requires no external power.
Sensor : Black and white bimetallic strips (2 pcs. each)
Full Scale : Approx. 2cal/cm2 min
Chart : Effective width 50mm
Minimum division:0.05gm-Cal/cm2/min
Drum roatation : 7 days and 24 hours (changeable by exchange of gear)
Clock drive : Quartz clock
Dimension (aaprox.) : 330(W) x 200(D) x 287(H) mm
Weight : 6.5 Kg (approx.)