2012 Product Catalogue

Specac Product Catalogue 2012 | 25 Reflection ATR
25 Reflection ATR
For high sensitivity ATR measurements with FT-IR or dispersive instruments
Key Features
• Variable angle of incidence (30º - 60º)
• 25 Reflections
• Suitable for both FT-IR and dispersive
instruments
• Two pin sample location on sample mount
• Standard 3” x 2” slide mounting
• Choice of crystal materials; KRS-5 as
standard
• Interchangeable sample holders (solids,
liquids and pastes)
Applications
• Solids
• Liquids
• Pastes
• Variable depth studies for coatings
and films
25 Reflection ATR
The 25 Reflection Variable Incidence ATR (P/N
GS11000) is a vertically mounted ATR crystal
accessory capable of being operated for a
crystal incidence angle of between 30º to 60º.
The angle of incidence for the crystal is quickly
and easily selected by rotation of a knurled
adjustment screw. This moves the sample holder
and crystal assembly to the correct position
when the back face of the holder is in line with
the required angle setting as indicated on the
graduated plate.
The standard crystal holder (P/N GS11001)
supplied with the ATR Accessory is for solid
samples, but a liquids holder (P/N GS11003) and
a paste holder (P/N GS11002) are available on
request. Although the sample holder and crystal
assembly can be positioned between the angles
of 30º to 60º, it is only when the holder and
crystal assembly are correctly aligned at the 45º
angle, that 25 internal reflections are obtained
within the crystal. Sufficient sample is required to
cover both faces of the trapezium shaped crystal
for 25 reflection events to be measured.
The ATR Accessory is supplied with a KRS-5
crystal as standard, but a variety of crystal
materials such as ZnSe, Ge and Si are available
to extend the sample handling and study
capabilities of the accessory.
The IR beam is directed through and collected
from the crystal by four mirrors which are
adjustable for both their rotation and tilt.
The accessory is supplied with a standard 3” x 2”
mounting plate that allows it to be positioned in
the spectrometer sample compartment using the
instruments own 3” x 2” mounting baseplate.
In addition, the accessory is supplied with a
support foot that is used in one corner of the
base. The foot is adjustable for height to provide
mechanical stability of the accessory whilst in the
sample compartment. A thumb nut locks the foot
in position.
Ordering information
25 Reflection Variable Incidence Angle ATR
GS11000 Includes: Solids holder and KRS-5
crystal (45°)
Options
GS11001 Solids holder for 25 Reflection ATR
GS11002 Paste holder for 25 Reflection ATR
GS11003 Liquid holder for 25 Reflection ATR
Spares and Consumables
GS11004 KRS-5 crystal (45°)
GS11006 Ge crystal (45°)
GS11009 Si crystal (45°)
GS11014 ZnSe crystal (45°)
GS11008 PTFE gaskets (1 large, 1 small) for
liquid holder (5 sets)
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