Roads and Tunnels Instrumentation

VICONOX

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Imagen de: VICONOX

The VICONOX tunnel atmosphere monitor is a single sensor solution for measuring NO2, NO, (NOx), CO, visibility and temperature (or combinations of) within a road traffic tunnel, rail tunnel or other confined space. These measurements can be used as part of an air quality management system for ventilation control and / or secondary smoke detection.

The VICONOX has been designed for harsh tunnel environments with a high quality, IP67 rated stainless steel enclosure. Wall mounted alignment bracketry, quick release heads and quick lock cable connections make installation and future servicing easy and simple. The VICONOX’s intelligent heads have RS485 (Modbus RTU), Digital Relays and Analogue Outputs as standard for connection to a PLC / SCADA system.

Specification

NO2 Measurement Performance

No. Parameter Units Min Max Comment
1 Path Length m 5 12 Optimum 10m
2 Measuring Range ppm (ppb) 0 10 User selectable (Option)
3 Resolution ppm 0.01 Display resolution
4 Accuracy (at 10m path length) PPM
%
-0.05
-5
+0.05
+5
(Detection Limit)
Of Reading
5 Damping s 1 999 Default setting is 20s

Visibility Measurement Performance

No. Parameter Units Min Max Comment
6 Measurement Range
Extinction Coefficient (k)
Meteorological Optical Range (MOR)
Opacity
Particulate Density (Dust)

km-1
m
%
mg/m3

0
0
0
0

15
15000
100
100

User selectable

With density scale factor =1.0

7 Resolution
Extinction Coefficient (k)
Meteorological Optical Range (MOR)
Opacity
Particulate Density (Dust)

km-1
m
%
mg/m3

0.1
1
0.1
0.1
Display Resolution

8 Accuracy
Extinction Coefficient (k)

km-1

-0.2

+0.2

At 10m path length
9 Damping s 1 999 Default setting is 3s

CO/NO (NOx) Measurement Performance

No. Parameter Units Min Max Comment
10 Measurement Range CO
Measurement Range NO
ppm
ppm
0
0
300
100
User Selectable
11 Resolution ppm 0.1 Display Resolution
12 Accuracy (Detection Limit)
CO
NO

ppm
ppm

1
2
13 Accuracy (Detection Limit)
CO
NO

%
%

-2
-5

+2
+5

Of Reading
(Instrument calibrated in-situ)
14 Damping CO
Damping NO
s
s
40
100

Temperature Measurement Performance

No. Parameter Units Min Max Comment
15 Display Range °C -40 +100 User Selectable
16 Resolution °C 0.1 Display Resolution
17 Accuracy °C -2 +2

Power

No. Parameter Units Min Max Comment
18 Voltage Vdc +24
19 Voltage Tolerance % -10 +10
20 Nominal Current Consumption A 2
21 Power UP Current Consumption A 3

Interface Options

No. Parameter Units Min Max Comment
22 Serial outputs Modbus RTU via RS485
External USB (RX)
23 Analogue Outputs (four) mA 0 / 2 / 4 20 Isolated and scalable (user selected)
24 Digital Relay Contacts (five) A 0 3 @30Vdc (signal levels and data valid)

Physical

No. Parameter Units Min Max Comment
25 Ingress Protection IP67
26 Operating Temperature °C -20 +55
27 Operating Humidity % 100
28 Materials AISI/SAE 316L Stainless steel
29 Dimensions mm 180 x 210 x 200 (each head without sight tubes)
30 Weight kg 5.3 Each head

Compliance & Design

No. Parameter Units Min Max Comment
31 Regulatory Compliance 2014/30/EU (Electromagnetic Radiation)
2014/35/EU (Low Voltage)
32 Design Life Years 20
33 MTBF Years >20
34 Warranty Months 24 Return to base warranty. Extensions available
Imagen de VICONOX
Imagen de VICONOX

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