สเปกโตมิเตอร์ IR infrared Spectrometer elemenbt สเปกโตโฟโตมิเตอร์ Spectrophotometer เครื่องสเปกโทรสโฟโตมิเตอร์ เครื่องวัดสเปกโตรโฟโตมิเตอร์อินฟราเรดแบบ Double-Beam
| Range of wave number | 4000-400cm -1 |
| Precision of wave number | ≤±4cm -1 (4000-2000cm -1 ) |
| ≤±2cm -1 (2000-400cm -1 ) | |
| Resolution | 1.5cm -1 (1000cm -1 around) |
| Transmittance precision | ±0.2%T (exclude noise level) |
| Flatness of I 0 line | ≤±2%T |
| Stray light | ≤0.5%T (4000-650cm -1 ) |
| ≤1%T (650-400cm -1 ) | |
| Test mode | 3 modes |
| Transmittance | |
| Absorbance | |
| Single beam | |
| Scanning speed | 5 steps |
| Very fast | |
| Fast | |
| Normal | |
| Slow | |
| Very slow | |
| Slit program | Very wide |
| Wide | |
| Normal | |
| Narrow | |
| Very narrow | |
| Response | 4 steps |
| Very fast | |
| Fast | |
| Normal | |
| Slow | |
| Work mode | 3 modes |
| Continuous scan | |
| Repeating scan | |
| Scan with fixed wavelength | |
| Expansion of horizontal and vertical coordinate | Arbitrary |


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