Overview
The TunnelTech 202 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 202 analyser uses well proven infra-red techniques to determine CO concentration and optical attenuation to monitor visibility levels.
Features & Benefits
- Continuous measurement of CO and Visibility in road and rail tunnels.
- Class leading Accuracy, Repeatability and Resolution.
- Rugged, corrosion resistant construction.
- Minimal maintenance requirements.
- Optional RS 485 (Modbus) Output.
Product Specification
| Gas Species Options | Single or multi-gas measurements available: CO & Visibility |
| Measuring Units | ppm for CO, m-1 or m for visibility |
| Response Time | CO 2mins / Vis 10s – 2min Selectable |
| Ambient Temperature | -20°C to +50°C |
| Power Supply | 12 – 24V dc 1.5A |
| Construction | Corrosion resistant epoxy coated aluminium housing sealed to IP65 |
| Analogue Outputs | 3 x 4-20mA current outputs as standard, isolated, 500Ω maximum load, fully configurable through TunnelTech software |
| Relay Outputs | 3 x volt-free SPCO contacts, 50V, 1A max, configurable as alarm contacts |
| Serial Data | For local connection to laptop PC using RS232 or optional RS485 interface unit |
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