The cold mirror technique measures dew point by condensing water vapor onto a mirror surface when gas temperature drops below the dew point—the saturation temperature of water vapor in the gas. As dew/frost forms, diffuse reflection of incident light triggers an electrical signal in the photosensitive device. The detection circuit sends signal changes and temperature data to the control system, which uses intelligent algorithms to calculate and display dew point temperature (frost point when below 0°C).
| Parameter | Details |
|---|---|
| Measurement Method | Fully automatic continuous measurement |
| Measured Gases | SF₆, N₂, H₂ (dew point testing) |
| Flow Rate | 400–800±50 ml/min (digital flow meter) |
| Temperature Resolution | 0.1°C |
| Measurement Range | 20°C to -62°C |
| Accuracy | ≤±0.3°C |
| Display Units | °C, ppm |
| Gas Pressure | ≤1 MPa |
| Operating Temperature | -20°C to 50°C |
| Humidity Resistance | ≤85% RH (non-condensing) |
| Power Supply | AC220V±10% (50Hz) / 24V lithium battery (≥8h runtime) |
| Power Consumption | ≤70W |
| Cooling Source | SL micro cooler |
| Sampling Interface | Self-sealing quick connector |
| Dimensions | 340*230*200 mm |
| Weight | ≤9.5 kg |
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Aligns with EU F-gas Directive | Zero-emission SF6 handling