The TunnelTech 204 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 204 analyser uses well proven optical attenuation technology to monitor Visibility levels. As there is only one moving part, reliability levels are very high and maintenance requirements are extremely low.

Key Features

  • Continuous measurement of visibility in road and rail tunnels
  • Class leading Accuracy, Repeatability and Resolution
  • Rugged, corrosion resistant construction
  • Minimal maintenance requirements
  • Optional RS 485 (Modbus) Output

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Feature

Specification

Gas Species Options Single or multi-gas measurements available: Visibility
Measuring units m-1 or m for visibility
Response Time 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
English Adobe_Acrobat_Pro_PDF TunnelTech 204 Datasheet 400kb

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