Viconox
Combined No2, NO, CO and visibility monitors for tunnels
The VICONOX tunnel atmosphere monitor is a single sensor solution for measuring toxic gases, visibility and temperature within harsh tunnel environments.
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.
Features
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Direct in-situ measurement of NO2, NO, (NOx), CO, Visibility and Temperature (or combinations thereof)
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Direct optical measurement of nitrogen dioxide (NO2) using differential absorption
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Visibility measurement using an accepted light transmission opacity technique
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Proven infrared spectroscopy technique for NO and CO measurement
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Quick lock plug and socket cable connection enabling simple installation
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RS485 communication (Modbus RTU), Digital Relays and Analogue outputs
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Optional extended warranty and 5 year refurbishment programs are available
Benefits
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Pre-aligned quick release TX and RX heads enabling easy installation and maintenance
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Up to 6 measurement parameters in one unit minimises capital cost but also minimises the requirements for cabling, installation and commissioning
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Temperature and humidity compensated measurements to ensure stable readings across all conditions
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Rugged design to withstand corrosive atmospheres and regular tunnel washing
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High quality 316 stainless steel construction ensuring a long service life
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IP67 rated external enclosure with quick release dust protection tubes
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 |
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