Transmission remains one of the most sensitive methods used in mid-IR spectroscopy. However, correct sample thickness is essential for obtaining good spectra. The wide range of sampling accessories has been designed for the comprehensive analysis of gases, liquids and solid samples. For gas analysis, pathlengths range from 5 cm up to 20 m for ppm sensitivity. Various cell and window designs are available for the measurement of aqueous and non-aqueous liquids. Films and other solids are measured using film holders, KBr pellet presses and other accessories designed for the transmission of light through a prepared sample.


Variable-Angle Transmission Accessory

Measurement ModeTransmittance
Sample Size4-inch diameter, 1-mm thickness
Angle of Sample0 - 90°
PolarizerWire-grid polarizer (KRS-5)
IQ AccessoryAvailable

Transmittance Measurement Autosampler
The AS-50 enables to perform the transmittance measurement of maximum 49 samples automatically.

Sampling3 mm diameter pellet
Film holder
No. of Samples49

Demountable Cell

WindowNaCl, KCl, KBr, KRS-5 CsI, CaF2, Quartz, Polyethylene
Pathlength0.025 - 100 mm
* Polyethylene window is used for Far-IR

Demountable Liquid Cell

WindowNaCl, KCl, KBr, KRS-5 CsI, CaF2, Quartz
Pathlength0.025 - 100 mm

Sealed Liquid Cell

WindowNaCl, KCl, KBr, KRS-5 CsI, CaF2, Quartz, ZnSe
Pathlength0.025 - 100 mm
* Please contact us if the cell is required for an FTIR vacuum system

Micro Sealed Liquid Cell

WindowNaCl, KCl, KBr, KRS-5
Optical Pathlength0.025 - 0.5 mm
Cell CapacityApprox. 2 µL
(when using 0.025 mm)

Micro KBr Pellet Die
Three types of die kits are available to form micro pellets of 2, 3 and 5 mm diameter. The average quantity of sample required is 50 µg for the 3 mm pellets die. A mini press or hydraulic press is required when forming pellets. In order to avoid to rust, coated pellet die kits of 5 and 3 mm pellet die are available.

Pellet Size5, 3 and 2 mm in diameter

KBr Pellet Die with Pellet Holder
Three types of die kits are available to form pellets of 7, 10 and 20 mm diameter. The hydraulic oil press is required when forming pellets.

Pellet Size7, 10 and 20 mm in diameter

Pellet Holder
The pellet  holders are used for mounting a formed pellet in the sample compartment.

Sampling SizeMicro KBr pellet,
10 mm diameter pellet (III type)
13, 20 mm diameter pellet (IV type)

Agate Mortar and Pestle
An agate mortar and pestle is used to grind samples and reduce particle size when making KBr pellets. Sizes of 60, 70 and 80 mm in external diameter are available.

Size60, 70 and 80 mm in diameter


The mini-press is used when forming micro pellets of 2 and 3 mm in diameter. The micro pellets can be easily made by applying hand pressure.

Hydraulic Press

The hydraulic press is used when forming pellets of samples with 5, 7, 10 and 20 mm in diameter. 100 kN and 200 kN types of presses are available.

The PL-82 linearly polarizes light in the IR region for measurements of polymer films, coatings and oriented film samples.

PolarizerWire grid polarizer (KRS-5)
Angle Setting Display0 - 180°

Control Panel for Full Vacuum System

The AVC-6000 is used to automatically control the vacuum and purge for the FT/IR-6000 vacuum type spectrometers.

Sample Shuttle
Two position software controlled sample shutter.

Number of PositionsTwo
Sample MountingStandard film or pellet mount
ControlSpectra Manager™