The 25 Reflection Multiple Reflection ATR Accessory supplied by Spectrolab Systems is a high-sensitivity FTIR sampling solution designed for demanding analytical applications. This vertically mounted, variable-incidence ATR accessory enables enhanced surface sensitivity through multiple internal reflections, making it ideal for low-concentration samples and thin surface layers.
Designed for research, quality control, and routine laboratory analysis, the 25 Reflection ATR supports solids, liquids, and pastes while offering precise control over crystal angle and sample contact for reproducible FTIR measurements.
Product Overview – 25 Reflection Variable Incidence ATR
The 25 Reflection ATR is engineered with an adjustable crystal angle between 30° and 60°, allowing users to control penetration depth and optimize the number of internal reflections. Up to 25 internal reflections can be achieved, significantly increasing sensitivity compared to single-reflection ATR accessories.
The crystal and sample holder assembly is vertically mounted and positioned using a knurled adjustment screw, ensuring stable alignment and repeatable results across measurements. This design makes the accessory suitable for both FT-IR and dispersive infrared instruments.
For routine single-reflection ATR analysis, laboratories may also consider the Golden Gate ATR.
For pellet-based FTIR transmission sample preparation, Atlas® Evacuable Pellet Dies and the Mini Pellet Press are commonly used.
Key Features of the Multiple Reflection ATR
- Variable angle of incidence: 30° – 60°
- Up to 25 internal reflectionsfor enhanced FTIR sensitivity
- Compatible with FT-IR and dispersive IR instruments
- Two-pin sample location for consistent positioning
- Standard 3″ × 2″ slide mounting
- Choice of crystal materials (KRS-5 supplied as standard)
- Interchangeable sample holders for solids, liquids, and pastes
Applications of the 25 Reflection ATR Accessory
- High-sensitivity FTIR analysis of solids, liquids, and pastes
- Polymer, chemical, and pharmaceutical research
- Surface and thin-layer analysis
- Quality control in industrial laboratories
- Academic and R&D spectroscopy environments
Technical Notes
- Standard solid sample crystal holder supplied (P/N GS11001)
- Liquid holder (P/N GS11003) and paste holder (P/N GS11002) available on request
- Maximum reflections achieved at approximately 45° crystal alignment
- Precision mechanical design ensures stable positioning and reproducible measurements
Why Choose the 25 Reflection ATR from Spectrolab Systems
- High-sensitivity ATR solution for low-concentration and surface analysis
- Flexible configuration for multiple sample types
- Robust mechanical design for laboratory and research use
- Supplied and supported by Spectrolab Systems, specialists in FTIR sampling accessories
ATR Accessories
FAQ’s
A multiple reflection ATR accessory is used for high-sensitivity FTIR analysis, particularly for thin films, surface layers, and low-concentration samples where enhanced signal strength is required.
Multiple reflection ATR accessories increase sensitivity by allowing infrared light to reflect multiple times within the crystal, whereas single-reflection ATR accessories prioritize speed and ease of use.
The 25 Reflection ATR supports solids, liquids, and pastes using interchangeable sample holders designed for each sample type.
Yes. While designed for high-sensitivity analysis, it is also suitable for routine quality control and research workflows requiring reproducible FTIR measurements.
A multiple reflection ATR is preferred when higher sensitivity is required. For fast, routine analysis with minimal setup, a single-reflection system such as the Golden Gate ATR is often sufficient.
