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TunnelTech 102

Cold Smoke Analyser

The TunnelTech Cold Smoke Monitor detects smoke from a fire to rapidly warn the operator of the hazard.


The TunnelTech 102 Cold Smoke Monitor is an essential part of any road or rail tunnel safety system. The CODEL CSM detects smoke from a fire to rapidly warn the operator of the hazard.

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 PT 101 temperature sensor to accurately measure ambient air temperature in a range of -15 to 105°C.

Features & Benefits

Product Specification

Gas Species OptionsVisibility
Measuring UnitsK factor(M-1) or metres
Measurement Range0.020 – 0.070m-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
Serial DataRS485 – Modbus RTU

Related Products

TunnelTech 305 - Air Flow Monitor
TunnelTech 700 - Gas Monitor

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