The TunnelTech 203 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 203 analyser uses well proven infra-red techniques to determine CO and NO concentrations. As there is only one moving part, reliability levels are very high and maintenance requirements are extremely low.
Key Features
- Continuous measurement of CO and NO in road and rail tunnels
- Class leading Accuracy, Repeatability and Resolution
- Rugged, corrosion resistant construction
- Minimal maintenance requirements
- Optional RS 485 (Modbus) Output
SpecificationImagesDocumentationProduct Enquiry
Feature |
Specification |
| Gas Species Options | Single or multi-gas measurements available: CO & NO |
| 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 aluminum 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 |
| Lang | Filetype | Document | Size |
 |
 |
TunnelTech 203 Datasheet | 400kb |
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