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Tunnel Monitoring

Thomson Environmental Systems (TES) partners with JES to deliver specialised tunnel monitoring solutions designed to improve safety, ventilation efficiency and operational control in complex underground environments. Combining JES's proven tunnel air quality monitoring technology with TES's engineering expertise and emissions monitoring capability provides customers with reliable, real-time data for managing critical tunnel conditions. JES offers a comprehensive range of tunnel monitoring systems designed to continuously measure key parameters including carbon monoxide (CO), nitrogen dioxide (NO₂), visibility, airflow velocity and other environmental indicators essential for effective ventilation management.

smart/ECS Multi Gas Sensor

An IoT-enabled gas sensor that can detect up to four gases: (CO, NO, NO₂, SO₂ - other gases on request)

JES t/LUX Lux Meter

Photometer for measuring the illuminance at the sensor mounting location (in-situ)

JES t/LUM-A Luminance meter (Tunnel Luminance Photometer)

Measuring luminance - the perceived light available for drivers to drive safely - the main control variable for the tunnel lighting.

JES t/FL-DP Air flow monitoring system – differential pressure

Measuring tunnel air flow by differential pressure.

JES t/FL-USX Air flow monitoring system – Ultrasonic cross-section

Precise ultrasonic air flow measuring system based on different transition times of ultrasonic pulses

JES t/SIG Traffic Signal Monitoring

Monitoring of traffic signal states in front of and in the tunnel

JES t/EXT Extractive Visibility and Gas Monitoring System

Extractive Visibility and Gas Monitoring System with all important components located outside of the tunnel.

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