Dimetix DAN-10-150 Laser Distance Sensor

The selection should be based on the actual distance, tolerance, target speed, surface, and control system.

• For monitoring structures, tunnels and civil works when millimeter precision is needed without reaching 500 m.
• For multipoint networks via RS-485 or industrial Ethernet.
• For alarm systems where several measurements are averaged and compared to limits.
• For deflection tests where it is important to measure from the ground without installing a contact transducer on the structure.

Alternatives within the D Series: DAE-10-050 for distances up to 50 m and -40 °C; DEN-10-500 if it is necessary to extend up to 500 m.

Examples of documented applications with Dimetix technology, where distance measurement is used to obtain position, level, deformation, or dimension.

Deformation monitoring in railway tunnels

Dimetix documented the direct use of the DAN-10-150 on concrete. The sensor measured the distance from a crossbeam or transverse structure to the vault; the position of that structure was monitored separately. The integration used RS-485, and 10 measurements were averaged every 10 minutes. The system generated automatic alerts if limits were exceeded and was designed to operate 24/7 with very restricted access.

Bridge deflection test

In another case, four DAN-10-150 sensors were used under a bridge to measure deflection at predefined points. The sensors were mounted on independent supports on ballast, and it was verified that the passage of trains on an adjacent track did not affect the readings. Deflection curves were recorded in real time during controlled loads and returned to zero when the load was removed.

Railway infrastructure

Laser measurement is also used for clearance, separation from infrastructure elements, and catenary control. The visible beam makes it easy to orient the sensor to the desired geometric point.

Movement of large structures

Multiple sensors can work simultaneously to verify that different points on a bridge or building move the same distance during a controlled maneuver.

• Interfaces: RS-232, RS-422/RS-485 and SSI; USB for configuration.
• Analog output: 0/4…20 mA programmable, max. error ±0.1%.
• Digital I/O: 2 programmable digital outputs + 1 error output + 1 digital input.
• Industrial Ethernet: PROFINET, EtherNet/IP and EtherCAT via optional cover.

• RS-485 can address up to 100 sensors, but the communication configuration and tracking mode must be properly planned for multipoint networks.
• The sensor has moving average filters and peak/error suppression, useful in monitoring; filtering improves stability at the cost of time response.
• On concrete, stone, or rough surfaces, it's best to aim at a representative and stable area. The laser spot's geometry increases with distance.
• For 100…150 m with reflector, confirm that the dot remains completely within the plate throughout the movement.

In critical applications, it is advisable to validate the target surface, ambient light, geometry, optical contamination, speed, and atmosphere before setting the useful range.