Horizon™ Multiple Reflection ATR Accessories

The Horizon™ multiple reflection ATR accessory is well suited for analysis of liquids, pastes, powders, and thick films by infrared spectroscopy. Its unique design utilizes the astigmatism inherent in spherical mirrors to shape the FT-IR beam to match the aperture of the ATR crystal, keeping radiation away from the edges of the crystal. This eliminates spectral interference from the adhesive securing the crystal and results in higher throughput. The Horizon™ features a convenient horizontal sampling surface (HATR) and PermaPurge™ for rapid sample and crystal exchange without interrupting the purge of the FT-IR system.

The Horizon™ is perfect for quality control and research applications. Optional cells are available for flow and temperature-controlled applications.

Horizon™ Liquid Sampler
Multiple reflection, ZnSe ATR with trough
Model No.
HON-L-XXX
Price
N/A
Horizon™ Solid Sampler
Multiple reflection, ZnSe ATR with pressure applicator
Model No.
HON-S-XXX
Price
N/A
NOTE: A Model No. ending in "XXX" denotes spectrometer code.

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Features
  • Top loading.
  • Unobstructed, horizontal sampling surface (HATR).
  • Thirteen reflections from the sample.
  • Readily exchangeable sampling plates.
    • Solid sampling plate includes pressure plate for analyzing powders and solids.
    • Gasket-sealed trough for measurements of liquids and pastes. User replaceable ATR crystal.
  • Rapid sample and crystal exchange without interrupting the purge.
  • Utilizes astigmatism to match the beam shape to that of the ATR crystal, creating insensitive edges within the crystal, minimizing spectral inference from the adhesive or gasket used to mount the crystal.
  • High spectral contrast.
  • High throughput (25-40%).
  • PermaPurge™ permits crystal exchange with minimal interrupting of the purge of the FT-IR system.
  • Wire grid polarizer available separately.
  • Optional adapters for injection, flow-through, and temperature controlled applications.
Includes
  • One mounted ZnSe 50x10x2mm SPT 45° ATR crystal
  • Solid or liquid sampling plate. Solid sampling plate includes a pressure plate and clamp; the liquid sampling plate has a trough to contain the liquid.
  • Mating hardware for the specified FT-IR spectrometer.
 
Model No. Product Description Price
PWG-U1R Wire Grid Polarizer

Slide plate mounted FTIR polarizer (KRS-5 substrate)

N/A
 
Model No. Product Description Price
ATC-USB-485 Temperature Controller USB to RS-485 Adapter For use with the Temperature Controller N/A
HON-FLL Flow Cell for Trough, Luers Horizon adapter with Luer fittings N/A
HON-FLL-TC3 TC Flow Cell for Trough, Luers Horizon temperature-controlled adapter with Luer fittings, 24V N/A
HON-FLS Flow Cell for Trough, Swageloks Horizon adapter with Swagelok fittings N/A
HON-FLS-TC3 TC Flow Cell for Trough, Swageloks Horizon temperature-controlled adapter with Swagelok fittings, 24V N/A
HON-FSL Flow Cell for Solid Sampler, Luers Horizon adapter with Luer fittings N/A
HON-FSL-TC3 TC Flow Cell for Solid Sampler, Luers Horizon temperature-controlled adapter with Luer fittings, 24V N/A
HON-FSS Flow Cell for Solid Sampler, Swageloks Horizon adapter with Swagelok fittings N/A
HON-FSS-TC3 TC Flow Cell for Solid Sampler, Swageloks Horizon temperature-controlled adapter with Swagelok fittings, 24V N/A
Heaters
Model No. Product Price
HON-HTR Heater Assembly for Horizon TC Flow Cells $341.00
HTRS-25 Cartridge Heater, 0.125" x 1.5", 24V/84W $132.00
O-Rings & Gaskets
Model No. Product Price
121-664-2 Kalrez Gasket for Horizon Trough $115.00
121-664-1 Viton Gasket for Horizon Trough $35.00
SPT-ATR-Plates
Model No. Product Price
EJ2122 SPT Plate Ge 45º 50 x 10 x 2 mm $499.00
EE2122 SPT Plate Si 45º 50 x 10 x 2 mm $528.00
EI2122 SPT Plate ZnS 45º 50 x 10 x 2 mm N/A
EM2122 SPT Plate ZnSe 45º 50 x 10 x 2 mm $524.00
HON-SSP-M ZnSe Horizon Solid Sampling Plate $915.00
HON-SSP-J Ge Horizon Solid Sampling Plate $940.00
HON-LSP-J Ge Horizon Trough $915.00
HON-LSP-M ZnSe Horizon Liquid Sampling Plate $930.00
 
Model No. Product Description Price
CCS-004 CristalCalc Software ATR calculator $191.00
IRS-671 Internal Reflection Spectroscopy by N.J. Harrick $0.00
IRS-RS1 Internal Reflection Spectroscopy: Review and Supplement by Francis M. Mirabella, Jr. and N. J. Harrick $0.00
IRS-V24 Infrared and Raman Spectroscopy of Biological Materials Edited by Hans-Ulrich Gremlich And Bin Yang $251.00
Horizon

The Horizon™ multiple reflection ATR accessory is a powerful tool for examining liquids, pastes, powders, and soft surface solids by infrared spectroscopy.

The unobstructed, horizontal sampling surface of the Horizon™ makes analysis easy. Samples of various sizes may be simply placed on top of the ATR crystal. For high quality spectra without atmospheric interference, this HATR accessory features PermaPurge™. This permits sample and crystal exchange while maintaining the purge through the FT-IR spectrometer and the accessory. This is ideal for quality control and other applications, which require rapid sample exchange.

Figure 1. The Horizon™ Solid Sampler.

Figure 2. Schematic of the Infrared Beam Profile of the Horizon as the Beam Passes through the ATR crystal.

The Horizon™ is shown in Figure 1. Mirrors M1 and M2 direct the incident infrared beam to mirror M3. This spherical mirror focuses the beam and, due to its off-axis orientation, elongates the beam to match the rectangular entrance aperture of the ATR crystal. The beam is internally reflected along the length of the crystal, where it interacts with the sample, and then exits the ATR crystal. The beam, which has interacted with the sample, is then reflected from spherical mirror M4 to mirror M5. Mirror M5 reflects the beam to mirror M6 and onto the detector of the FT-IR spectrometer.

The ATR crystal is positioned relative to the focal points of the two spherical mirrors so that the beam shape is elongated to match the aperture of the crystal at both its entrance and exit (see Figure 2).

Upon entering the crystal, the light continues converging in the direction parallel to the width of the crystal. When it reaches the center of the crystal, it starts diverging. Thus within the crystal, the radiation is kept away from the edges of the crystal. This eliminates spectral interference from the adhesive used to seal the crystal onto the mounting plate. This optical design results in a highly efficient multiple reflection ATR accessory.

Representative infrared spectra obtained using the Horizon are shown in Figures 3 through 6.

Figure 3. ATR Spectrum of Sweetened Coffee (without Milk) Relative to Water.

Figure 4. ATR Spectrum of an Adhesive on Paper.

Figure 5. ATR Spectrum of Anhydrous Maleic Acid
in Molten Polypropylene Recorded at 185°C.

Figure 6. ATR Spectrum of Black Foam Packing Material.