Overview
The document provides detailed information about various spectroscopes and spectral measuring instruments offered by A.KRÜSS Optronic GmbH. These instruments are designed for qualitative analysis and measurement of emission and absorption spectra, suitable for laboratory applications, educational purposes, and practical research.

Handheld Spectroscopes 1501 and 1504
These portable precision spectroscopes are ideal for schools and universities. They are used for checking the line spectrum of gas discharge lamps and for individual and comparative spectral examinations.

• 1501 Specifications: Variable slit, angle dispersion C–F 7°, linear dispersion 60 mm (Amici type prism).
• 1504 Specifications: Same as 1501 with an additional wavelength scale of 400–750 nm.
• Accessories: Stand, scale illumination, spare lamp.

Spectroscope 1701
This is a Kirchhoff-Bunsen Spectroscope used for qualitative analysis. It features a moveable observation tube and ocular, and a fixed scale tube that can be calibrated in wavelengths.

• Specifications: Moveable observation tube, fixed slit tube, scale tube with 200 divisions, ocular and objective specifications, flint prism with specific dispersion and dimensions.
• Accessories: Scale illumination, wavelength scale, spare prism, spare lamp.

Spectrometer-Goniometer 1836
This model is used for the exact measurement of optical data on prisms and can also function as a spectroscope.

• Specifications: Infinitely variable observation tube, crosshairs ocular, scale reading precision of 1 angle min, specific objective and prism details.
• Accessories: Prism holder, grill retainer, Rowland type gratings, spare prism, crosshair's ocular, scale illumination options, spare lamp.

How a Spectrometer Works
The document explains the basic operation of a spectrometer, which involves collimating incoming light, diffracting it using a prism or diffraction grating, and observing the resulting spectrum. This allows for accurate wavelength measurement and material identification based on unique spectral fingerprints of elements, such as sodium's distinctive spectral lines.