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Spectrophotometer Types

Colorimeters: Standard and microprocessor-controlled units with built-in wavelength filters display concentration directly.

Visible Light Spectrophotometers: Simple spectrophotometers use only visible light (380 to 750 nm) produced by a tungsten lamp. Portable and benchtop models with a continuous wavelength range are most commonly used for routine laboratory work. Choose from analog and digital models that feature optional data acquisition software for your PC.

UV-Visible Spectrophotometers: A second lamp—usually deuterium—turns a visible light spectrophotometer into a UV-visible unit that can measure from 190 nm to 750 nm. UV-visible models are available with a variety of features, including scanning, multiple cells, integral printers, and user interfaces.

Fluorometers: Fluorometers measure the fluorescence released when a sample is exposed to a single wavelength of light. Select one of our compact and efficient fluorometers for unlimited analysis testing in biotechnical, pharmaceutical, and environmental applications.

Infrared Spectrophotometer: Some applications in teaching and research environments require the measurement of solid, liquid, and gas samples. Our scanning infrared spectrophotometer provides data over a full range of wavelengths from 4000 to 600 cm^-1 in seconds.

Mercury Analyzing Spectrophotometer: An economical alternative to atomic absorption systems, our mercury analyzing spectrophotometer quickly measures trace amounts (0 to 9 µg) of mercury in potable, surface, saline, or waste water.

Atomic Absorption Spectrophotometer: A high-temperature flame evaporates water and dissociates the sample into ions. These features allow for high-precision analysis in environmental testing, toxicology, and Q.C. laboratories. An optional continuous-flow hydride/cold vapor system lets you test for arsenic, selenium, or mercury.

Comparison Table

Industry	Surface	Color meter and spectrophotometer models
Painted surfaces	Flat panels	12-mm 45/0 cone, 12-mm hemisphere, 26-mm, 11-mm benchtop
	Curved surfaces	3-mm, use foam baffle
	Masonry, stucco, cement	20-mm D with window and baffle
Plastics	Flat areas	12-mm cone
Small parts	3 mm
Curved surfaces	3-mm, use foam baffle
Wire and cable	Small wire and fiber special, 3-mm and fixture
Fibers and small tubes	up to 5-mm D, wire and fiber special
Textured surfaces	20-mm D with window, 12-mm hemisphere
Powders	12-mm or 20-mm with window, 30-mm bench top
Transparent	12-mm with white background
Foods and agriculture	Cheese, meats	12-mm w/window, 20-mm D w/window
	Powders, flour, sugar	20-mm D w/window, 30-mm bench top
	Fruits, outside	12-mm cone
	Fruits, inside and fish	12-mm with window
	Leaves, small areas	3 mm
	Soil and grass clippings	20-mm D w/ window, 30-mm bench top
	Coffee, grains, snack foods	30-mm bench top
	Opaque liquids, sauces, dips	30-mm bench top
Graphic arts	Litho printing	3 mm
	Other printing small	3 mm
	Ink proofs, larger print targets	12-mm cone
Paper	Finished paper	12-mm, 11-mm bench top
	Paper pulp and paper board	20-mm D w/ window
Textile	Textile printing	3 mm
	Hard weave	12-mm cone
	Solid colors soft weave	20-mm D w/window, 30-mm bench top
	Packages	12-mm cone
Cosmetics	Foundation drawdowns	12-mm cone, 11-mm bench top
	Skin, cosmetics on skin	12-mm flat head
	Powders and creams	12-mm or 20-mm with window, 30-mm bench top
	Lipstick	12-mm with thin film press
	Packaging	3 mm

Reference source: http://www.coleparmer.com/TechLibraryArticle/695