| Parameter | Value | |-----------|-------| | | 8,300 – 350 cm⁻¹ | | Spectral range (optional ZnSe windows) | 6,000 – 550 cm⁻¹ | | Resolution (best) | 0.5 cm⁻¹ | | Wavelength accuracy | 0.1 cm⁻¹ (at 3000 cm⁻¹) | | Wavelength precision | 0.01 cm⁻¹ | | Signal‑to‑noise ratio (LiTaO₃ detector) | 9,300:1 (5‑second scan) | | Signal‑to‑noise ratio (DTGS detector, optional) | 14,500:1 | | Dimensions (W × D × H) | 450 × 300 × 210 mm (without UATR) | | Weight | approx. 13 kg (28 lbs) | | Power requirements | 100–230 V, 50/60 Hz, max 65 VA | | Operating temperature | 0 °C to 50 °C | | Maximum relative humidity (KBr windows) | 80% (non‑condensing) | | Maximum relative humidity (ZnSe windows) | 90% (non‑condensing) |

The Spectrum Two is sealed, but desiccant packs must be monitored via the software to keep optics dry.

: Instructions for the common UATR sampling accessory used with this spectrometer can be found through the University of North Texas .

Ensure the beam path is clear, then click the designated icon in the scan toolbar.

| Window Material | Spectral Range | |----------------|----------------| | KBr (standard) | 8300 cm⁻¹ to 350 cm⁻¹ | | ZnSe (optional, for high humidity) | 6000 cm⁻¹ to 550 cm⁻¹ |

: Procedures for desiccant replacement and cleaning the sample compartment. Manual FTIR SPECTRUM TWO II Perkin-Elmer | PDF - Scribd