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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