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VICOTEC320 air quality measuring device
New

For ventilation control and accurate nitric oxide monitoring in road tunnels

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VICOTEC320 air quality measuring device
New

For ventilation control and accurate nitric oxide monitoring in road tunnels

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)
FLEXible answers to individual needs
Current product

VICOTEC320 air quality measuring device

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  • Specialized products
  • Designed for demanding applications

What is FLEX?

FLEX selections
Technical excellence
Simplicity
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Fundamental selection Meet your basic measurement needs
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Lean selection Handle your core processes easily
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Extended selection Optimize your processes with innovative technologies
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Xpert selection Master your most challenging applications
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Manufacturer's warranty

Engineered for confidence

Our instruments are designed for long‑lasting performance, precise measurement, and dependable operation in demanding industrial environments. Each product includes a standard manufacturer’s warranty that reflects our commitment to quality and to the trust you place in our solutions.

Should a warranty case occur, the device will be assessed and the applicable remedy will be provided in line with the warranty terms – helping ensure a reliable and efficient resolution and supporting continued operation of your measurement point.

Request for extended warranty

If you require extended warranty coverage, simply contact your local Endress+Hauser representative. Our experts will advise you on the available options to match your application and risk profile, helping you protect your investment, reduce unexpected repair costs, and ensure reliable long‑term operation beyond the manufacturer's warranty period.

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Warranty terms apply

The manufacturer's warranty and extended warranty are subject to specific conditions. For full details, please refer to the locally applicable General Terms and Conditions (GTC), which can be found on the respective country page of our website.

Services by your side

Right‑first‑time commissioning, worldwide

Endress+Hauser’s qualified service engineers ensure your measurement devices are commissioned right the first time, delivering application‑aligned accuracy, regulatory compliance, and operational confidence from startup onwards, anywhere in the world.

Remote support you can trust wherever you operate

With Endress+Hauser Smart Support, you benefit from faster issue resolution, higher uptime, reliable global expertise across the entire product lifecycle – and lasting peace of mind.

Committed to long‑term, sustainable performance

With deep field expertise, harmonized processes, and continuous monitoring, we accompany you with comprehensive service offerings – from initial start‑up through instrumentation maintenance to process optimization – as a true lifetime partner delivering improved outcomes.

For additional information, please contact your local Endress+Hauser representative.

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Personalized transaction space

Check prices and delivery times, save your favorite products, create quotes and place orders in just a few clicks and track deliveries at any time. With access to your complete order and quote history including all relevant documents you benefit from full transparency throughout the entire process.

Easy access to technical documentation

Select and download all technical documentation such as operating manuals, calibration certificates, approvals and CAD drawings conveniently bundled as a complete documentation package for your entire order or quote.

My Endress+Hauser – all in one place

My Endress+Hauser is your 24/7 connection to Endress+Hauser – in the office, in the field or on the go. It brings together transaction management, documentation and software downloads, knowledge base access, customer support, engineering tools and cloud‑based IIoT services helping you work easier, faster and more efficiently.

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Product information

Specifications
Measuring / Application task Visibility, Gas, Temperature
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Description

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.

Field of application
  • Ventilation control and filter monitoring in tunnels
  • Monitoring of air quality in road tunnels


Device properties:

  • 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
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)
Downloads
Most downloaded
Operating Instruction (BA)
VICOTEC320 Air Quality Tunnel Sensors
English version - 01/2025
Download
White paper (WP)
Continual monitoring of nitrogen oxides (NO and NO2) and visibility inside tunnels It is essential to monitor air quality and visibility in tunnels to
ensure road safety. Measuring the visual range and CO concentration
has therefore been part of standard practice for many years now. ...
English version - 11/2025
Download
Operating Instruction (BA)
VICOTEC320 Gas Adjustment Kit The Gas Adjustment Kit continuously checks the gas type and measuring
range set for agreement with gas type and measuring range of the
connected gas sensor and outputs an error if there is an inconsistency.
English version - 01/2025
Download
All downloads
14 Downloads
Operating Instruction (BA)
VICOTEC320 Gas Adjustment Kit The Gas Adjustment Kit continuously checks the gas type and measuring
range set for agreement with gas type and measuring range of the
connected gas sensor and outputs an error if there is an inconsistency.
English version - 01/2025
Download
Operating Instruction (BA)
Most downloaded
VICOTEC320 Air Quality Tunnel Sensors
English version - 01/2025
Download
Ex Safety Instruction (XA)
Safety Information for non-Ex analyzer devices
(multi-lingual, also in DE, BG, CS, DA, EL, ES, ET, FI, FR, HR, HU, IT,
LT, LV, NL, NO, PL, PT, RO, RU, SK, SL, SV)
English version - 01/2025
Download
Special Documentation (SD)
VICOTEC320, VICOTEC410, VICOTEC450 and VISIC100SF Adaptation of measured visibility values in tunnels with LED lighting
(multi-lingual, also in DE, ES, FR, IT, PT, RU, ZH)
English version - 01/2025
Download
Competence Brochure (CP)
Emission Monitoring Solutions Broad portfolio and long-standing experience
English version - 05/2026
Download
Competence Brochure (CP)
Solutions for traffic and tunnel safety An overview brochure about traffic and tunnel sensor, their
development during the last 60 years, the main applications in front
and within a tunnel as well as the measuring devices at a glance
English version - 04/2026
Download
Competence Brochure (CP)
交通用センサ 道路およびトンネルの安全ソリューション 道路およびトンネルのセンサに関する概要パンフレットであり、過
去60年間の開発の経緯、トンネルの前方および内部での主な用途、
そして測定装置の一覧が紹介されています。
Japanese version - 10/2025
Download
Competence Brochure (CP)
Soluzioni per il monitoraggio delle emissioni Soluzioni per il monitoraggio delle
emissioni
Ampio portfolio e vasta esperienza
Italian version - 05/2025
Download
Competence Brochure (CP)
Lösungen zur Emissionsüberwachung Breites Portfolio und langjährige
Erfahrung in Gasanalyse und
Durchflussmessung
German version - 03/2026
Download
Competence Brochure (CP)
排出ガス監視ソリューション 幅広い製品群と長年にわたる実績 排出ガス監視、測定原理と技術、国際的な要件とサービス、選択ガイド、そして測定装置の一覧をまとめたパンフレット
Japanese version - 09/2025
Download
Competence Brochure (CP)
Verkehrssensoren Lösungen für die Verkehrs-
und Tunnelsicherheit
German version - 03/2026
Download
Innovation (IN)
VICOTEC320 – Air Quality Tunnel Sensors to control Ventilation in Road Tunnels Reliable air quality measurement in road tunnels
English version - 01/2025
Download
White paper (WP)
Most downloaded
Continual monitoring of nitrogen oxides (NO and NO2) and visibility inside tunnels It is essential to monitor air quality and visibility in tunnels to
ensure road safety. Measuring the visual range and CO concentration
has therefore been part of standard practice for many years now. ...
English version - 11/2025
Download
Verification DTM
VICOTEC320 SDD file SOPAS device description file for VICOTEC320
Version - YQ32

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