The AQM consists of a transceiver that projects infrared beams to a reflector unit mounted 3m away. The reflected light is received by the transceiver and the specific absorption is measured to determine the visibility dimming coefficient and carbon monoxide concentration in the tunnel atmosphere.
- Measurement of CO by infrared absorption
- High resolution measurement of visibility
- Accuracy +/-1ppm for CO, 0.0002m-1 for visibility
- Designed to withstand the harshest environments
- RS232 or RS485 – Modbus output optional
|Gas Species Options||Single or multi-gas measurements available: CO & Visibility|
|Measuring units||ppm for CO, m- or m for visibility|
|Response Time||CO 2mins / Vis 10s – 2min Selectable|
|Ambient Temperature||-20°C to +50°C|
|Power supply||12V DC @1.5A|
|Construction||Corrosion resistant epoxy coated aluminium housing sealed to IP66|
|Analogue outputs||3 x 4-20mA current outputs as standard, isolated, 500Ω load max, fully configurable
through TunnelCraft software.
|Relay Outputs||3 x volt-free SPCO contacts, 50V, 1A max, configurable as alarm contacts|
|Serial Data||RS485 Modbus Protocol|
To view theTunnelCraft 3 full specification please click here to download the product datasheet.
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