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en:datasheets:tfl-usx [2026-05-21 20:25] – [Technical Specifications] jesadminen:datasheets:tfl-usx [2026-05-21 23:06] (current) – external edit 127.0.0.1
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   *Sensor setup via service interface   *Sensor setup via service interface
   *Suitable for tunnel cross sections up to 18 m \\ (Measuring path up to 25 m)   *Suitable for tunnel cross sections up to 18 m \\ (Measuring path up to 25 m)
-  *Connection to tunnel control system either via analogue output and relays or via RS 485 MODBUS RTU+  *Connection to tunnel control system either via analogue output and relays or via RS-485 MODBUS RTU
   *Visible LEDs to indicate sensor status   *Visible LEDs to indicate sensor status
   *Optional, remote smart/HUB touch operation unit to display measured values and to modify parameters   *Optional, remote smart/HUB touch operation unit to display measured values and to modify parameters
-  *Certified according IEC/CSA/UL 61010-1 (cCSAus Kennzeichnung) +  *Certified according IEC/CSA/UL 61010-1 (cCSAus marking)
  
 ===== System setup ===== ===== System setup =====
   *Two sensors (master & slave) with mounting clamps mount-ed below the tunnel ceiling in an angle of 30° to 60° to the tunnel axis   *Two sensors (master & slave) with mounting clamps mount-ed below the tunnel ceiling in an angle of 30° to 60° to the tunnel axis
   *Terminal box for master to connect the power supply and the connections to the tunnel control system and the slave   *Terminal box for master to connect the power supply and the connections to the tunnel control system and the slave
-  *Terminal box for Slave+  *Terminal box for slave
   *Optional remote smart/HUB touch operating unit   *Optional remote smart/HUB touch operating unit
  
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 ===== Operation ===== ===== Operation =====
  
-The air flow monitoring system measures the air flow based on different transmission times of ultrasonic pulses sent in one or the other direction. This cross section measurement delivers the average air speed more reliable and meaningful than methods that measure only one or two points on the tunnel wall.+The air flow monitoring system measures the air velocity and direction based on different transmission times of ultrasonic pulses sent in one or the other direction. This cross section measurement delivers the average air velocity more reliable than methods that measure only one or two points on the tunnel wall.
  
 Two sensors are mounted below the tunnel ceiling, cross section with an angle of 30° to 60° (usually 45°) such that a vector component of the air flow overlaps the direction of the ultrasonic sound pulses exchanged by the two sensors. Two sensors are mounted below the tunnel ceiling, cross section with an angle of 30° to 60° (usually 45°) such that a vector component of the air flow overlaps the direction of the ultrasonic sound pulses exchanged by the two sensors.
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 Air flow in the tunnel influences the transition time of the pulses between sender and receiver. Based on the difference in transition times of ultrasonic pulses sent in one or the other direction the measured values are calculated. Air flow in the tunnel influences the transition time of the pulses between sender and receiver. Based on the difference in transition times of ultrasonic pulses sent in one or the other direction the measured values are calculated.
  
-Measured values are air speed, air flow rate, direction of air flow and acoustic virtual temperature.+Measured values are air velocity, air flow rate, direction of air flow and acoustic virtual air temperature.
  
 ===== Advantanges ===== ===== Advantanges =====
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 ===== Application ===== ===== Application =====
  
-~~SNIPPET_O1779395156~~en:snippets:datasheet:application~~+~~SNIPPET_O1788987257~~en:snippets:datasheet:application~~
 Tunnels are important infrastructure elements in road networks and facilitate the connection of regions.  Tunnels are important infrastructure elements in road networks and facilitate the connection of regions. 
  
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-~~SNIPPET_O1779395156~~en:snippets:techdata:tfl-usx:tfl-usx_airflow-measurement~~+~~SNIPPET_O1788987257~~en:snippets:techdata:tfl-usx:tfl-usx_airflow-measurement~~
 {|class="techdata" {|class="techdata"
 !colspan="2"|Air flow measurement !colspan="2"|Air flow measurement
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 |- |-
 |Measured values |Measured values
-|Air speed \\ Air flow rate \\ Direction of air flow \\ Acoustic virtual air temperature+|Air velocity\\ Air flow rate \\ Direction of air flow \\ Acoustic virtual air temperature
 |- |-
 |Measuring range  |Measuring range 
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 |- |-
 |Resolution  |Resolution 
-|0.1 m/s, accuracy depending on measuring distance, flow profile, installation, typically <±0.2 m/s at 3 m/s+|0.1 m/s 
 +|- 
 +|Accuracy 
 +|2% end of measuring range
 |- |-
 |Response time |Response time
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-~~SNIPPET_O1779395157~~en:snippets:techdata:tfl-usx:tfl-usx_outputs~~+~~SNIPPET_O1788987257~~en:snippets:techdata:tfl-usx:tfl-usx_outputs~~
 {|class="techdata" {|class="techdata"
 !colspan="2"|Outputs !colspan="2"|Outputs
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 ==== Conformities ==== ==== Conformities ====
  
-~~SNIPPET_O1779395156~~en:snippets:techdata:tfl-usx:tfl-usx_conformities~~+~~SNIPPET_O1788987257~~en:snippets:techdata:tfl-usx:tfl-usx_conformities~~
 {|class="techdata" {|class="techdata"
 !colspan="2"|Conformities !colspan="2"|Conformities
en/datasheets/tfl-usx.1779395156.txt.gz · Last modified: (external edit)
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