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Photometric System Design:

Monochromator Included?

Light Source:

Detector Type:

Wavelength Range:

Spectral Resolution:

Wavelength Accuracy:

Wavelength Reproducibility:

Stray Light:

%

Detector Sample Volume:

Flow Rate Range:

Transmittance:

%

Absorbance:

(#)

Reflectance:

%

Local Interface:

Computer Interface?

Computer Interface Options:

Application Software Included?

Display Options:

Additional Output Options:

Portable?

Selectable Wavelength Scanning Speed?

Spectral Correction Equations?

Quantitative Analysis Capabilities?

Self-Calibration?

Extreme Environment?

Data Storage Options?

Operating Temperature:

Allow up to: overrange/margin
Use the overrange/margin to restrict your search to items whose full-scale range is close to your requirements.
(Overrange/margin requires both 'From' and 'To' values to work.)

Help with UV and Visible Spectrometers specifications:

UV/VIS Spectrometer
   Photometric System Design:       
   Your choices are...         
   Scanning Single Beam       There are two types of instrument, either a single wavelength light source or a selector for a single wavelength. The light from the lamp is dispersed before reaching the sample cell. 
   Scanning Double Beam       A scanning double beam instrument measures both the transmittance of the sample and solvent at each wavelength simultaneously and computes the ratio. The light from the lamp is dispersed before reaching the sample cell. 
   Non-Scanning Array-Detector       In non-scanning array-detectors, all wavelengths pass through the sample and the dispersing element is between the sample and the array detector. This allows the detector to simultaneously record the transmitted light power at multiple wavelengths. 
   Other Type       Other unlisted, specialty or proprietary Photometric System Design. 
   Search Logic:      All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches.
   Monochromator Included?       A monochromator is used to separate the wavelengths of the light source before the light passes through the sample and enters the detector. 
   Search Logic:      "Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice.
   Light Source:       
   Your choices are...         
   Tungsten-Halogen Lamp       Tungsten-halogen lamps are used for visible and NIR measurements. 
   Deuterium Discharge Lamp       Deuterium discharge lamps are used for UV measurements. 
   LED       Light emitting diodes (LEDs) emit a single wavelength, used in scanning single beam instruments. 
   Other Method       Other unlisted, specialty or proprietary Light Source. 
   Search Logic:      All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches.
   Detector Type:       
   Your choices are...         
   Photomultiplier       A photomultiplier tube, useful for light detection of very weak signals, is a photo emissive device in which the absorption of a photon results in the emission of an electron. These detectors work by amplifying the electrons generated by a photo cathode exposed to a photon flux. 
   Diode Array       A diode array detects which light is absorbed and which is reflected. 
   Charge Coupled Device (CCD)       A CCD chip is an array of light-sensitive elements; which are, in fact, some small electronic capacitors. These capacitors are charged by the electrons generated by the light. In fact, each light element (commonly called photon), that reaches the CCD array's atoms, displaces some electrons, which are providing a current source. These current sources, are localized in small delimited areas (the capacitors), called pixels. 
   Other Detector       Other unlisted, specialty or proprietary Detector Type. 
   Search Logic:      All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches.
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Performance Specifications
   Wavelength Range:       Wavelength range is the dispersion of the grating across the linear array; also expressed as the "size" of the spectra on the array. 
   Search Logic:      User may specify either, both, or neither of the "At Least" and "No More Than" values. Products returned as matches will meet all specified criteria.
   Spectral Resolution:       Spectral resolution is a measure of the narrowest spectral feature that can be resolved by a spectrometer. One of the more common ways to characterize spectral resolution is to determine the full width at half maximum (FWHM) of an instrument's response to a monochromatic signal. 
   Search Logic:      All matching products will have a value less than or equal to the specified value.
   Wavelength Accuracy:         
   Search Logic:      All matching products will have a value less than or equal to the specified value.
   Wavelength Reproducibility:       May also be called repeatability. 
   Search Logic:      All matching products will have a value less than or equal to the specified value.
   Stray Light:       Stray light refers to any radiation reaching the detector that is not emitted from the sample at the chosen wavelength. 
   Search Logic:      All matching products will have a value less than or equal to the specified value.
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Sampling Specifications
   Detector Sample Volume:       Volume of sample that the detector can handle. 
   Search Logic:      User may specify either, both, or neither of the "At Least" and "No More Than" values. Products returned as matches will meet all specified criteria.
   Flow Rate Range:       Rate of flow through the detector. 
   Search Logic:      User may specify either, both, or neither of the "At Least" and "No More Than" values. Products returned as matches will meet all specified criteria.
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Measurement Specifications
   Transmittance:       Transmittance is the ratio of the radiant power transmitted by a sample to the radiant power transmitted by a blank in an equivalent cell or by some other means of compensation for solvent absorption, reflection losses, etc. 
   Search Logic:      All matching products will have a value greater than or equal to the specified value.
   Absorbance:       Absorbance is the measure of concentration of material present: negative log (base 10) of Transmittance [- log 1/ T] of product of extinction coefficient, path length, and concentration, written as A = e bc. 
   Search Logic:      All matching products will have a value greater than or equal to the specified value.
   Reflectance:       Reflectance is the ratio of the radiant energy reflected by a body to the energy incident on it. Spectral reflectance is the reflectance measured within a specific wavelength interval. 
   Search Logic:      All matching products will have a value greater than or equal to the specified value.
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User Interface Options
   Local Interface:       
   Your choices are...         
   Analog Front Panel       The panel has analog user inputs such as potentiometers, dials, switches, for adjustment of output, ranges, etc. 
   Digital Front Panel       The panel uses digital keypads or menus for programming. 
   Search Logic:      All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches.
   Computer Interface?       The spectrometer can be controlled or monitored remotely with a computer via interface. 
   Search Logic:      "Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice.
   Computer Interface Options:       
   Your choices are...         
   Serial Interface       Serial interfaces can be ports, or interfaces that can be used for serial communication, in which only one bit is transferred at a time. Examples include RS232, RS422, RS485, USB etc. 
   Parallel Interface       Parallel interface channels are capable of transferring more than one bit at a simultaneously. Examples include PC Printer Port, Centronics, etc. 
   Other Computer Interface       Modem, transmitter, TTL, etc. 
   Search Logic:      All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches.
   Application Software Included?       For control or for monitoring processes. 
   Search Logic:      "Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice.
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Display Options
   Display Options:       
   Your choices are...         
   Analog Meter       Data is displayed with an analog meter or simple visual indicator. 
   Digital Readout       Device uses numerical or application specific display. 
   Video Display       The data is presented in video form via CRT, LCD, or other multi-line forms. 
   None       No integral display. Output is read and displayed remotely. 
   Search Logic:      All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches.
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Additional Output Options
   Additional Output Options:       
   Your choices are...         
   Outputs an Analog Voltage         
   Output is a Pulse       Frequency or modulated frequency output (Ex. sine wave, pulse train, AM, FM). 
   Outputs an Analog Current         
   Output is a Switch or Relay Contact         
   Search Logic:      All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches.
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General Features and Functionality
   Portable       Portable spectrometers are modular devices that are designed for ease of transport and assembly.  Rugged enclosures, PC interfaces, and customizable software packages are common features for the portable device. 
   Search Logic:      "Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice.
   Selectable Wavelength Scanning Speed?       The spectrometer has selectable speeds at which to scan different wavelengths in the UV and visible spectrum. 
   Search Logic:      "Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice.
   Spectral Correction Equations?       Spectrometer has the integral ability to correct for variations in the spectrum generated due to stray light and other parameters. 
   Search Logic:      "Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice.
   Quantitative Analysis Capabilities?       Analyzer has the ability to quantify the gases present in the sample. 
   Search Logic:      "Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice.
   Self-Calibration?       The detector can perform self-calibration without prompting by the user. 
   Search Logic:      "Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice.
   Extreme Environment?       For use in extreme environments. 
   Search Logic:      "Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice.
   Data Storage Options?       Detector has data storage options. 
   Search Logic:      "Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice.
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Environment
   Operating Temperature:       This is the full required range of ambient operating temperature. 
   Search Logic:      User may specify either, both, or neither of the limits in a "From - To" range; when both are specified, matching products will cover entire range. Products returned as matches will meet all specified criteria.
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