Vis Guard 2 Extractive
Vis Guard 2 Extractive
Reliable visibility measurement
Description
VisGuard 2 is a compact visibility and aerosol monitoring sensor designed for continuous measurement of visibility and airborne particle concentrations in demanding environments. It is ideal for road and rail tunnels, where it supports ventilation control and early fire/smoke detection, as well as for applications requiring monitoring of dust concentration in air or the presence of oil mist.
The instrument provides high-precision, long-term stable visibility measurement using an energy-efficient LED light source with very low power consumption. Optional heating elements help eliminate fog-related interference, ensuring reliable measurements even under harsh climatic conditions.
Thanks to its compact design and simple mounting, VisGuard 2 can be easily installed in both new and existing infrastructures. Flexible system integration and permanent instrument self-monitoring in the background guarantee reliable operation and straightforward connection to control and safety systems. Recalibration is quick and simple with the dedicated checking unit, while the limited use of consumables and low maintenance requirements result in reduced operating costs over the entire lifetime of the device.
Technical specifications
| Measuring principal | 30° scattered light |
| Wavelength | 880 nm |
| Measuring span | 0 .. 100 PLA or 0 .. 3000 mE/m |
| Resolution | 0.001 mE/m |
| Conformity | ASTRA «Guideline – Ventilation in road tunnels (2008)», RABT (2006), RVS 09.02.22 |
| Material of housing | Stainless steel 1.4435 / 1.4571 |
| Ambient temperature | –30 °C .. +55 °C |
| Ambient humidity | 0..100% rel. humidity |
| Protection class | IP66 (only with mounted protection caps) |
| Supply voltage | 24 VDC |
| Power input | 7 W (In-situ), 1 W (Extractive) + 10 W (heater, optional) |
| Pipe connections | Inline VARINLINE® - housing or compatible DN 40 … DN 150, 1 1/2“... 6“ |
| Weight | 6.5 kg (In-situ), 5.0 kg (Extractive) |
| Dimensions | approx. Ø 209 x 366 mm (In-situ) approx. Ø 209 x 254 mm (Extractive) |
| Connection box SIPORT 2 | |
| Power supply | 100 .. 240 VAC; 47 .. 63 Hz |
| Power input max | 25 W / 45VA |
| Protection class | IP66 |
| Enclosure | Polyester, fibre glass reinforced |
| Weight | 1.3 kg |
| Dimensions | 220 x 155 x 91 mm |
| Modules for SIPORT 2 | |
| Module Profibus DP | Interface Profibus DP |
| Modulo Modbus RTU | Interface Modbus RTU with repeater |
| Module StromRel | 2 x 0/4 .. 20 mA, max. 500 Ω galv. isolated. 3 x semiconductor relays max. 30V, max. 0.12A, Ron max. 25 Ω |
| Handheld control unit SICON-C for SIPORT 2 | |
| Display | 3,5“ Graphics TFT with touch operation |
| Control unit SICON (M) | |
| Power supply | 24 VDC |
| Power input | Max. 5 W + photometer |
| Display | 3,5“ Graphics TFT cowith touch operation |
| Ambient temperature | −10 .. +50 °C |
| Ambient humidity | 0 .. 100% rel. humidity |
| Protection class | IP66 |
| Dimensions | 160 x 157x 60 mm |
| Weight | 0.6 kg |
| Output | 4 × 0/4 .. 20 mA, galv. isolated 7 × digital |
| Input | 5 × digital |
| Digital interfaces | Ethernet, microSD card, Modbus TCP |
| Optional modules (max. 2) | Profibus DP, Modbus RTU, HART, 4 × 0/4 .. 20 mA output, galv. isolated 4 × 0/4 .. 20 mA input Sampling systems |
| In-situ | In-situ instrument for direct mounting in the tunnel |
| Mini-Extractive | In-situ instrument with tube extension of up to 2.5m |
| Extractive 0-5m | sampling system 0 .. 5 m |
| Extractive 5-30m | sampling system 5 .. 30 m |
| Extractive 30-500m | sampling system 30 .. 500 m |
| Multiple sampling | multiple sampling of up to 8 ducts |
