Geoves

Description

MAIN TECHNICAL FEATURES 

NSR measures the net radiation between a surface, from the near ultraviolet to the far infrared. The net radiation is the difference from the irradiance that arrives on the upper surface and the irradiance on the lower surface of the instrument.
From one side the upper receiving surface measures the direct and diffuse solar irradiance and the irradiance with long wavelength emitted from the sky (clouds); to the other side the lower receiving surface measures the solar radiation reflected from the soil (Albedo) and the irradiance with long wavelength emitted from the earth.
The sensor is available with 0…5Vdc and 4…20 mA (two wires link) outputs.

MEASURING PRINCIPLE

The NSR net-radiometer measuring principle is based on a thermopile sensor where his own hot junctions are in thermic touch with the upper receiver and, to the opposite side, the cold junctions are in thermic contact with the lower receiver. The difference of temperature from the two receivers is proportional to the net solar irradiance. The temperature difference from the hot junction and the cold one is converted in a Potential Difference thanks to the Seebeck effect. The two receivers consist of a portion of spherical dome covered by teflon®. The particular shape of two receivers ensures a response based on to the cosine optimal law. The teflon® coating as well as allowing outdoor installation for long periods without risk or damage, can have a constant spectral response from ultraviolet (200nm) up to the far infrared (100μm).

ADVANTAGES

• Excellent value for money
• Long life span, reliability and minimum maintenance
• Weather resistant