Air quality measuring devices
VICOTEC320

For ventilation control and accurate nitric oxide monitoring in road tunnels

Your Benefits

Energy and cost savings for ventilation control due to very low zero offset and accurate measurement
Low operational costs because no air aspiration of ambient air and no test gases are required
Low maintenance requirements due to long maintenance interval (approx. 1 year)

The exact device specifications and performance data of the product may deviate from the information provided here, and depend on the application in which the product is being used and the relevant customer specifications.

Overview

For ventilation control and accurate nitric oxide monitoring in road tunnels

The VICOTEC320 measures very small concentrations of NO₂ and NO as well as the visibility and temperature in road tunnels quickly and simultaneously. And all this using industry-proven components – without test gases for zero and reference point. An automated, cyclic adjustment of zero and reference point ensures exact values. The rugged housing even withstands thorough tunnel washing operations without any impairments.

The VICOTEC320 can be optionally equipped with an electrochemical CO measurement cell. This is useful for performing the plausibility checks with CO which some tunnel standards (e.g., German RABT2006) recommend – even when NO₂ is used as lead gas component.

At a glance

Very low detection limits for NO and NO₂
Automatic function monitoring and self-adjustment
Very rugged design in stainless steel
Automatic beam alignment between sender/receiver unit and reflector

Accessories

Spare parts

Applications

Service & Support

Technical overview

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VICOTEC320 system

Measured values

Visibility (K-value), NO, NO₂, NO_x, CO, temperature

Measurement principles

Differential optical absorption spectroscopy (DOAS), transmittance measurement, electrochemical cell, Resistance thermometer

Measuring distance
	10 m

Measuring ranges
K-value	0 ... 15 km⁻¹ / 0 ... 200 km⁻¹
NO	0 ... 20 ppm / 0 ... 45 ppm
NO₂	0 ... 1 ppm / 0 ... 5 ppm
CO	0 ... 100 ppm / 0 ... 300 ppm
Temperature	–25 ... +55 °C / –25 ... +75 °C

Response time (t₉₀)
Visibility (K-value)	5 s ... 360 s Adjustable (45 s pre-configured)
NO, NO₂	5 s ... 360 s Adjustable (45 s pre-configured)
CO	≤ 60 s

Linearity
NO	± 0.48 ppm
NO₂	± 0.035 ppm

Detection limit
Visibility (K-value)	0.03 km⁻¹
NO	0.002 ppm
NO₂	0.007 ppm

Repeatability
Visibility (K-value)	0.017 km⁻¹
NO	0.031 ppm
NO₂	0.007 ppm

Ambient temperature
	–20 °C ... +55 °C
CO sensor	–10 °C ... +40 °C

Storage temperature
	–25 °C ... +75 °C
CO sensor	0 °C ... +20 °C

Ambient pressure
	700 hPa ... 1,200 hPa

Ambient humidity
	10 % ... 95 % Relative humidity; non-condensing

Conformities

ASTRA "Guideline - Ventilation of Road Tunnels" (2008)

RABT 2006

RVS 09.02.22

Electrical safety

Enclosure rating
	IP69K

Analog outputs

6 outputs:
0 ... 20 mA
Depending on device version

Digital outputs

4 relay contacts:
Depending on device version

Digital inputs

4 potential-free contacts

I/O extensions

Optical fiber connection optional

Ethernet	✔
Function	Connection to SOPAS ET software or OPC server

Modbus	✔
Type of fieldbus integration	TCP

CAN bus	✔
Function	For connection of a SCU control unit

Operation

Via software SOPAS ET

Dimensions (W x H x D)
Sender/receiver unit	718 mm x 470 mm x 310 mm (for details see dimensional drawings)
Reflector unit	617 mm x 278 mm x 245 mm (for details see dimensional drawings)
Connection unit	450 mm x 254 mm x 148 mm (for details see dimensional drawings)

Weight
Sender/receiver unit	20 kg
Reflector unit	9 kg
Connection unit	8 kg

Material

Stainless steel 1.4571, powder-coated

Power supply
Voltage	115 V AC, ± 10 %
	230 V AC, ± 10 %
Frequency	50 Hz / 60 Hz
Power consumption	≤ 200 VA

Test functions

Automatic check cycle for zero and span point

Contamination check

Manual linearity check

Options

CO sensor