Irish eyes are smiling on Honeywell Zellweger Analytics following the building of a bespoke gas monitoring system for the euros 750 million ($902.9 million) Dublin Port Tunnel project in Ireland.

Dublin Port handles two-thirds of the port trade of Ireland with an estimated two million trucks using the port per year. As the existing road passes through the urban area of the city, the tunnel has been built in order to ease congestion and improve access to the port.
The resulting 5.6 km road tunnel required a comprehensive gas detection solution and Honeywell Zellweger Analytics engineers, working closely with their client, Mercury Engineering, have designed and built the monitoring system at the Poole site in the UK. Mercury Engineering carried out the design, supply and installation of the following services for the entire Dublin Port Tunnel project: Power, lighting, ventilation and hydrant ring main along with the sump pumping, drainage, ventilation and fire suppression systems.
The Honeywell Zellweger Analytics bespoke Gas Monitoring System forms an integral trigger component for the Sump Nitrogen Foam Fire Suppression System. Designed to stringent client specifications, the system consists of two stormwater sumps, designated northbound and southbound. Four large 6-Input Pump Aspirated Gas Sampling Systems service a total of 24 sampling points between the two sump areas, with 24 Sensepoint Combustible gas detectors utilised to monitor the levels of potentially flammable gas concentrations (incorporated into pump aspirated sampling systems) and 24 Sensepoint Toxic (O2) gas detectors utilised to monitor the level of oxygen gas content.
Sieger System 57 control racks have been installed to process signals from gas detectors and sampling systems to provide appropriate alarm outputs and visual alerts.