Model 100 
  Transmissometer

  Model 100V
  Transmissometer

  Model 100IR
  Transmissometer

  Model 500W
  Transmissometer

  Model 1000C
  Transmissometer

  Reflectometers

  Fizeau 
  Interferometers

  Infrared 
  Interferometers

  Dual Wavelength
  Interferometers

  Tutorials

  About Us
 
 

Our Transmissometers are currently being used for measuring transmittance of glass, filters, plastics, films, optical coatings, etc.  The ability to choose central wavelength and bandwidth of the test beam permits Graham Transmissometers to be configured for many diverse purposes.

Transmittance Calibration
The system is calibrated by the operator to read 0.0% with the optical path blocked and 100% with no sample present.  Readings are therefore absolute, with no optical standard required.

All Graham Transmissometers operate in any normal ambient lighting condition
-- no need to operate the instrument in a darkened room!

Model 100 Our lowest cost Bench Transmissometer

When cost is a factor, the Model 100 fills the bill very nicely!  With a 3-1/2 LCD Digital readout, the instrument provides 0.1% accuracy +/-  1 least significant digit. The instrument can accommodate a sample up to 1 inch thick and can measure to the center of an 8-inch wide substrate.
In use, the Operator simply sets Zero with the light path blocked, then sets 100% with no sample in the light path. Measurements of Percent Transmittance (%T) are obtained automatically simply by inserting the sample in the optical path. Like all Graham Transmissometers, the Model 100 is virtually maintenance free. 

That's all there is to it!
                                                                                                                        The Model 100 
 

MODEL 100V WHITE LIGHT Bench Transmissometer -- Permits insertion of a Color Filter 
The Model 100V employs a white light source, which permits the operator to insert a color filter to inspect any region of the visible spectrum.  Typical accuracy of +/-0.1 % is achieved.  The ability to choose bandwidth and central wavelength of the test beam permits the Model 100V to be configured for many diverse purposes. 
The instruments feature an electronically chopped  test beam for maximum accuracy and independence from ambient lighting conditions.  The Model 100V can accommodate samples up to 2.0 inches thick and can measure to the center of a 12-inch wide sample.  They are easy to use, stable in operation, and provide highly reproducible readings. Like all Graham Transmissometers, the Model 100V is virtually maintenance free. 

Model 100IR -- an Infrared version of the Model 100V
Permits the selection of one or more channels in the infrared.  It can be formatted like of any of the 100V models, but offers  a number of wavelengths in the near infrared ( 700 to 1000 nM)
                   The Model 100V

                                                                                           MODEL 500W with remote head 
                                                                                           Monitors transmittance of moving wen
The Model 500W -- available in many formats, some shown here, this Transmissometer employs a remote head which is configured to the customer's requirements.  This permits the evaluation of very large samples, special shapes, moving webs, etc. in remote locations and hostile environments. 

High Vacuum Heads
Special remote heads are available for use inside vacuum coating chambers. Available in single or multiple channels, these heads permit the measurement of transmittance uniformity of moving webs of film.

                                     Model 500W LCD Readout
Submersible Heads
These heads, which may be immersed in any non-corrosive liquid, can be used to monitor concentration of reagents and solutes during chemical reactions. 

Since many organic compounds absorb infrared radiation of specific wavelengths, when equipped with the appropriate infrared source, these submersible heads can be used to monitor the concentration of various organic compounds during actual reactions.  Analog output from the Model 500W can be connected directly to a recorder, to monitor reaction rates.

                              2-Channel Model 500W Rack Mount (Shown with Optional Integrator)

Potential customers are encouraged to inquire about any special features which they may need for their application.  A number of customized modifications are available at no additional cost.

Model 1000C

This is a computerized model that permits the collection of both numeric and graphic data.   Because it offers continuous output, the Model 1000C is capable of being used for process control as well as storage of data for quality assurance. Available in any of the illustrated formats in single or multiple channels
 

MODEL	FEATURES	BENEFITS
Model 100	White Light source only 3-1/2 digit LCD Display  Accuracy  +/- 0.1%	Low power consumption Battery Version Available (Model 100B) Lowest Cost Model
Model 100V	White light or specific wavelength 4-1/2 digit LED or LCD Display  Accuracy +/- 0.02% Analog output	Accepts filter for any visible wavelength Multiple Channel versions available Extra digit gives higher accuracy Connect to data logger or chart recorder
Model 100IR	Specific infrared wavelengths 4-1/2 digit LED or LCD Display Accuracy +/- 0.02% Analog Output	Customer selected wavelength Multiple wavelength option Analog Output Connect to data logger or chart recorder
Model 500W	Remote Optical Head Bench Top or Rack Mount available 4-1/2 digit LED or LCD Display Accuracy +/-0.02% Analog Output	Usable for measuring moving web Model for use in high vacuum chamber Submersible remote heads available Multiple channels available Connect to data logger or chart recorder
Model 1000C	Computerized model Bench Top or Rack Mount Onboard or remote optical head  4-1/2 digit LED or LCD Display Accuracy +/-0.02%	Turnkey System Data Logging capability Process Control capability Continuous chart recording Multiple channels available