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 |
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| 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) |
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| 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) |
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| 32 | Design Life | Years | 20 | ||
| 33 | MTBF | Years | >20 | ||
| 34 | Warranty | Months | 24 | Return to base warranty. Extensions available |
Contact us
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