Perrygraf Electro-Optics Infrared Radiation Calculator

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Country of manufacture: USA,            Date of manufacture: >= 1986
Overall length: 25.7 cm,          Width: 12.1 cm.,           Weight: 39.7 gms.
Materials: cardboard shell with cardboard slide
Cursor: no cursor
Scales: 22, most specialized
Front: [ T °C, T °K ] Emissivity [ Watts/Sq.Cm., Watts/Sq.Cm.at Maximum ] Energy Factor at Maximum W_λ [ λ Wavelength Microns , Transmssion Coefficient-Transmission Spectra of the atmosphere, λ Wavelength Microns ] % increment energy below any wavelength for a blackbody at T°
Back: [ T °C, T °K ] Emissivity [ W/Sq.Inch, BTU/Sq.Ft./Hr. ] Emissivity, [ Photons/Sec/Sq.Cm., Photon Energy at λ Max ] Range (cm) [ Irradiance ] Range (nautical miles)
Condition: C3 (Very Minimal Signs of use)
Came with: transparent plastic sheath

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