Optical Systems offer this economical instrument which typically measures
white light transmittance with an accuracy of +/- 0.1%
Graham Transmissometers operate in any normal ambient lighting condition
no need to operate the instrument in a darkened room!
instruments feature an electronically chopped test beam for maximum accuracy
and independence from ambient lighting conditions. They are easy
to use, stable in operation, and provide highly reproducible readings.
100 accepts samples up to two inches thick although modifications will
be made to accommodate special requirements. 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.
basic instrument is useful for measurement of transmittance of glass, filters,
plastics, films, optical coatings, etc. If the requirement is to measure
transmittance at some specific wavelength we recommend the Model 100V
or Model 100IR.
requires only a few seconds for the operator to calibrate the instrument.
Using front panel controls, he adjusts the instrument to read 0.0% with
the optical path blocked and 100% with no sample present. Readings are
therefore absolute, with no optical standard required. These instruments
are very stable and after the initial 30 minute warmup, maintain their
calibration over many hours of operation. However, in order to guarantee
the highest repeatability, we recommend that the operator repeat the calibration
procedure a few time throughout the day -- preferably once per hour to
assure highest accuracy
calibration, the user simply places the test piece on the top surface of
the transmissometer and obtains immediate measurements of Percentage
Transmittance (%T) which are shown directly on the 3-1/2 digit Liquid Crystal
Display. As a result, a large number of readings can be made in a
very short time. Ten measurements per minute are readily accomplished.
Further Information call Gordon Graham today at (818) 700-126
Beam Diameter 5.9 mm
measurement of small areas
operation, Lowest Cost
relative transmittance measurements of colored substrates and filters
Size Accommodated 8 x 8 inches maximum
measurement of selected areas of sample
Readout (3-1/2 digits)
accuracy of +/- 0.1 percent
Time ~ 20 minutes
stable operation throughout the workday
(W x D x H) 10.3 x 10.0 x 4.0 inches
approximately 10 pounds
Requirements 117 volts 60 Hz 1.0 Ampere or
220 volts 50 Hz 1.0 Ampere
be provided for operation anywhere
for field operation
limited Warranty, Parts and Labor 1 year
life of stable operation.
Graham Model 100 instruments have been in trouble-free operation for over
Optical Systems, 9530 Topanga Canyon Blvd., Chatsworth, CA
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page last updated November 15, 2014