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VisGuard 2 Extractive

VisGuard 2 Extractive

Visibility Monitor

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.

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Application

Dust concentration in air, oil mist detection in ship industry, machine & metal industry, visibility monitoring in rail and road tunnels

features & benefits

  • Continuous monitoring of oil mist concentration 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

specification

  • Conformities: ASTRA «Guideline – Ventilation in road tunnels (2008)»
    RABT (2006)
    RVS 09.02.22
  • Measuring principle: 30° scattered light
  • Wavelength: 880 nm
  • Nominal range: 0 .. 1'000 PLA (Polystyrol-Latex-Aerosols)
    0 .. 30 E/m
  • Resolution: ±0.001 mE/m
  • Enclosure: Stainless steel 1.4435 / 1.4571
  • Protection class: IP66 (only with mounted protection caps)
  • Ambient temperature: -30 °C .. +55 °C
  • Ambient humidity: 0 .. 100 % rel. Humidity
  • Operation voltage: 24 VDC
  • Power consumption: 1 W
    Option: heater 10 W
  • Dimensions: approx. Ø 209 x 254 mm
  • Weight: 5 kg
  • Connection box SIPORT 2
    Power supply: 100 .. 240 VAC; 47 .. 63 Hz
    Power input: max. 25 W / 45 VA
    Protection: IP66
    Enclosure: Polyester, fibre glass reinforced
    Weight: 1.3 kg
    Dimensions: approx. 220 x 155 x 91 mm
  • Modules for SIPORT 2
    Interface Module Profibus DP
    Interface Module Modbus RTU
    Interface Module PowerRel:
    - 2 x 0/4 .. 20 mA, max. 500 Ω, galvanic separated
    - 3 x Semiconductor relays max. 30 V, max. 0.12 A, Ron max. 25 Ω
  • Hand-held control unit: SICON-C for SIPORT 2:
    Graphics TFT with touch operation
  • Control Units:
    SICON
    SICON M

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