Agilent Cary UV-Vis-NIR Internal Diffuse Reflectance Accessory
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PN: G9831A
Integrating spheres are versatile accessories that accommodate a wide variety of sample types, and allow for various measurement modes. The integrating sphere is hollow and its internal surface is a non-selective diffuse reflector. The geometry of the integrating sphere is designed to collect the majority of reflected or transmitted radiation (without directional preference), presenting an integrated signal to the detector.
Agilent has a range of internal DRAs for the Cary 4000, 5000, 6000i, or 7000 instruments. The three internal DRAs are designed to perform reflectance, transmittance, or absorptance measurements of diffuse, specular, or mixed samples.
Features
- Variety: The internal DRAs can be used with all Agilent high end UV-Vis and UV-Vis-NIR instruments, so you can choose the DRA option that best suits your needs.
- Flexibility: Reflectance and transmittance mounting options are provided as standard. Other options are available for powders and small samples, including variable angle center mount attachments for solids and solutions.
- Ease of use: A thoughtfully designed lock down lever saves time, with no tools required to install accessories.
The DRAs are available in either an external or an internal version. The internal version fits completely inside the instrument sample compartment.
| Internal DRA |
| Max sample size limited to sample compartment dimensions |
| Small efficient size resulting in high signal to noise and greater dynamic range |
| 110 mm sphere |
| Port to sphere area ratio: <3% |
Measurement capabilities
With the use of optional accessories, the external DRA can perform more measurement types than the internal version. The table below conveys the different measurement types each DRA can be used for.
| Internal DRA | External DRA | |
| Total %R (Specular + Diffuse) | ✓ | ✓ |
| Diffuse %R (Specular excluded) | ✓ | ✓ |
| Transmission %T | ✓ | ✓ |
| Curvette Holder (optional) | ✓ | ✓ |
| Solid Sample Holder | ✓ | ✓ |
| Powder Cell Holder (optional) | ✓ | ✓ |
| Mount for Polarizer/Depolarizer (optional) | ✓ | ✓ |
| Tranmission (Variable Angle) (optional) | × | ✓ |
| Transflectance (Center Mount) (optional) | × | ✓ |
| Small Spot Kit (SSK) (optional) | × | ✓ |
| Aperture Kit (optional) | × | ✓ |
DRA-2500 (PMT/PbS version): The PbS NIR detector is peltier cooled and optimized in real time. This provides the highest photometric linear range of any commercial PbS instrument.
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