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| Brand | Thermo Fisher |
|---|---|
| Origin | USA |
| Model | 450i |
| Detection Principle | Pulsed UV Fluorescence (H₂S converted to SO₂ prior to measurement) |
| Measurement Range | 0–10 ppm / 0–25 mg/m³ (selectable spans) |
| Zero Noise | 1.0 ppb RMS (60-sec average) |
| Limit of Detection (LOD) | 2.0 ppb (60-sec average) |
| Zero Drift (24 h) | <1 ppb |
| Span Drift (30 days) | ±1% of full scale |
| Optical Filter Type | Reflective bandpass |
| Reaction Chamber | Temperature-stabilized |
| UV Source | Long-life, stable pulsed UV lamp |
| Data Storage | Onboard flash memory |
| Connectivity | Ethernet (remote data access, configuration, diagnostics) |
| Display | High-contrast graphical LCD showing primary measurement + five auxiliary parameters |
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