SPECTROPHOTOMETER

SPECTROPHOTOMETER
MAKE DINESH SCIENTIFIC
MODEL DS-SPM-900
DESCRIPTION
A Double Beam spectrophotometer is an instrument used to measure the intensity of light absorbed by a sample at specific wavelengths. Here is a detailed description of its components and working principles:
Components
LIGHT SOURCE:
 Provides the necessary light for the measurement.
 Common light sources include tungsten lamps for visible light and deuterium lamps for UV light.
MONOCHROMATOR:
 Separates the light into its component wavelengths.
 Typically consists of a prism or a diffraction grating to disperse the light, and an exit slit to select the desired wavelength.
SAMPLE HOLDER:
 Holds the sample cuvette in the path of the light beam.
 Cuvettes are usually made of materials transparent to the specific light being used, such as quartz for UV measurements and glass or plastic for visible light.
DETECTOR:
 Measures the intensity of light that passes through the sample.
 Common detectors include photodiodes or photomultiplier tubes that convert light into an electrical signal proportional to the intensity.
READOUT DEVICE:
 Displays the measurement results.
Modern spectrophotometers often include digital displays and may be connected to computers for data analysis and storage.
TECHNICAL DETAILS:
MODEL DS-SPM-900
Optical System Double Beam
Sample type Liquid
(capable of handling solid samples)
Baseline stability ±0.0002 Abs/hr
Baseline flatness ±0.0003 for full range
Noise level < 0.0002 Abs at 500 nm
Stray light < 0.005% for Nai solution (at 220nm) or NaNO2 solution (at 340nm)
Detector Photomultiplier Tube
Modes of measurements Abs, % Reflectance, % Transmittance
Interface USB
Wavelength range 190-900
Photometric Absorbance (Abs) ±5
Bandwidth Variable; 0.1, 0.2, 0.5, 1,2, 5 nm
Light source Halogen or tungsten deuterium with an automated switch (using a UV lamp to turn on and off)
Scan speed 2200 nm
Wavelength accuracy ±0.1 nm at 656.1 nm D2; ±0.3 nm for all range
Photometric absorbance accuracy at 1 Abs (+/-) ±0.003
Photometric reproducibility / repeatability ±0.002
Software If software based on Windows 10 is available, the seller will give a free upgrade to Windows 11.
Computer-based Operating Unit Computer will be provided by IOCL during installation
Connectors USB connectors from computer to instrument will be in the scope of supply
Power Supply 230 V ± 10, 50 Hz
Accessories/Peripherals Five pair of 10mm quartz cuvette/cells
Additional Features Upgradeable for a variety of attachments, such as auto-samplers, solid samplers, and multi-cell changers.