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TunnelTech 101

Visibility Monitor (VIS)

The TunnelTech 101 Visibility Monitor (VIS) is an essential part of any road or rail tunnel safety system. Firstly, it monitors the visibility within the tunnel and ensures that the tunnel ventilation system provides sufficient clean air for drivers to clearly see the road ahead.

Secondly, used in combination with other TunnelTech 101 VIS monitors, the operator can quickly detect the focus of the fire if it is also equipped with the optional PT100 temperature sensor to accurately measure ambient air temperature in a range of -15 to 105°C.

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The TunnelTech 101 Visibility Monitor (VIS) monitors the visibility within the tunnel and ensures that the tunnel ventilation system provides sufficient clean air for drivers to clearly see the road ahead.

 

OVERVIEW

The TunnelTech 101 Visibility Monitor (VIS) is an essential part of any road or rail tunnel safety system. Firstly, it monitors the visibility within the tunnel and ensures that the tunnel ventilation system provides sufficient clean air for drivers to clearly see the road ahead.

Secondly, used in combination with other TunnelTech 101 VIS monitors, the operator can quickly detect the focus of the fire if it is also equipped with the optional PT100 temperature sensor to accurately measure ambient air temperature in a range of -15 to 105°C.

 

FEATURES AND BENEFITS

  • Continuous measurement of visibility in road and rail tunnels
  • Optional, integral ambient temperature measurement for locating fires
  • No moving components providing maintenance-free operation
  • Accurate optical attenuation technology
  • Option Modbus RTU serial outputs
Gas Species OptionsVisibility
Measuring UnitsK factor(M-1) or metres
Measurement Range0 – 0.015m-1
Ambient Temperature-20°C to +50°C
Power Supply24V DC
ConstructionAluminium enclosures
Analogue Outputs1 x 4-20mA isolated current output, 500Ω maximum load, fully configurable
through TunnelMaster software
Relay Outputs1 x volt-free SPCO contacts, 50V, 1A maximum load, configurable as alarm contacts
Series DataRS485 – Modbus RTU

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