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

TunnelTech 501: CO-NO-NO₂
TunnelTech 502: CO-NO-
TunnelTech 503: CO
TunnelTech 504: NO
TunnelTech 505: NO₂
TunnelTech 506: CO-NO₂
TunnelTech 507: NO-NO₂

The TunnelTech 500 Series 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 500 Series analyser uses electrochemical cell technology to determine CO, NO & NO₂ concentrations. 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 widowsand 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 in one compact sensor.
• Advanced electrochemical cell technology.
• High resolution measurement.
• Minimal maintenance requirements.
• Available in 316 Stainless Steel.

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