Thiết bị đo độ đục VisGuard Extractive Visibility Monitor - Photometer VietNam

• Continuous monitoring of visibility using scattered light principle
• Easy to service, high sensitivity, stability and accuracy
• A special sample flow concept entirely eliminates the danger of flow cell contamination
• Operation via local control unit or central multi-channel control unit
• Easy calibration check with checking rod, even at high dust levels
• Installed outside the traffic area in protected, easily accessible rooms: Servicing without any danger to maintenance staff or traffic hindrance
• Dual-beam method
• Easy zero-point checking, even when visibility is poor
• Optional sample heater: Choice of measurement with/without fog compensation

The VisGuard measures the scattered light intensity of a sample drawn into the instrument. Filtered purge air is fed through the flow cell, thus enveloping the sample in a protective shroud of clean air. This effectively keeps the optics clean. Installations are either in the tunnel cavity/niches (in-situ) respectively using extractive sampling away from the cavity. An optional sample heater eliminates the influence of any mist effects.