Uses the latest Electrochemical Cell Technology for the measurement of CO, NO and NO₂.

TunnelTech 701: CO-NO-NO₂-Vis
TunnelTech 702: CO-NO-Vis
TunnelTech 703: CO-Vis
TunnelTech 704: NO-Vis
TunnelTech 705: NO₂-Vis
TunnelTech 706: CO-NO₂-Vis
TunnelTech 707: NO-NO₂-Vis
TunnelTech 708: Vis

The TunnelTech 701 Air Quality Monitor, is an essential part of any road or rail tunnel safety system. Firstly, it monitors the atmosphere within the tunnel and ensures that the tunnel ventilation system provides sufficient clean air to protect tunnel users health and for drivers to clearly see the road ahead.

The TunnelTech 701 analyser electrochemical cell technology to determine CO, NO & NO₂ concentrations and optical attenuation to monitor Visibility levels. As there are no moving parts, reliability levels are very high and maintenance requirements are low. The sight tubes have been designed to ensure that airborne dust and contaminants do not reach the optical windows and cause drift.

Data is connected via RS485 serial port delivering a bi-directional modbus interface to the tunnel SCADA system or optional CODEL TunnelTech 710 remote display panel.

• Measure CO, NO, NO₂ & Visibility in one compact sensor.
• Advanced electrochemical cell technology.
• High resolution measurement.
• Minimal maintenance requirements.
• Available in 316 Stainless Steel.

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