Bidirectional Laser Speed & Length Gauge (DLS-R Series)

Laser Speed & Length Gauge

Product introduction

Key Features

Technical parameters

Application

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FAQ

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Laser Speed & Length Gauge

Bidirectional Laser Speed & Length Gauge (DLS-R Series)

The DALA bidirectional laser speed & length gauge is suitable for length and speed measurement of objects with various materials, colors, shapes, and transparency levels, and can also be used for fixed-length cutting. It supports zero-speed mode and forward/reverse direction recognition, making it perfectly suited for production scenarios with frequent start-stop operations and material reversal.

The product supports a variety of industrial communication protocols, including Modbus (RTU/TCP), Bluetooth, and industrial Ethernet protocols such as PROFINET, PROFIBUS, EtherNet/IP, and EtherCAT

Measurement Range

0m/min~±3000m/min

Measurement Data

Speed ,Length

Measurement Principle

Laser Doppler

Application Industries

Suitable for industries such as wire & cable, rubber, plastics, paper making, textiles, film, steel, and more

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Product introduction

The bidirectional laser speed & length gauge is suitable for length and speed measurement of objects with various materials, colors, shapes, and transparency levels, and can also be used for fixed-length cutting.

-Supports zero-speed mode and forward/reverse direction recognition, perfectly suited for production scenarios with frequent start-stop operations and material reversal

- Non-contact, scratch-free, maintenance-free, and calibration-free

- Measurement accuracy: ±0.05%; repeatability: ±0.02%

- Widely applicable in industries including wire & cable, rubber, plastics, paper making, non-ferrous metals, packaging, film, cold rolling, hot rolling, textiles, and extrusion

- Equipped with RS485, digital I/O, pulse output, and industrial Ethernet (multi-protocol support) communication and control interfaces

- Available with different mounting standoff and depth-of-field options to ensure ultra-high measurement accuracy

Key Features

Laser Doppler

Non contact, No calibration

Supports zero-speed mode, adaptable to complex production scenarios with frequent start-stop operations

Identifies forward/reverse direction, ideal for production lines with material reversal and bidirectional reciprocating length counting.

Technical parameters

Parameter	DLS120-R	DLS300-R
Minimum Speed (m/min)	0	0
Maximum Speed (m/min)	±1200	±3000
Nominal Standoff Distance (mm)	120	300
Depth of Field (mm)	12	60
Dimensions (L×W×H mm)	165×110×69	165×110×69
Measurement Accuracy (%)	±0.05	±0.05
Repeatability (%)	±0.02	±0.02
Measurement Update Time (μs)	20	20
Power Supply	24VDC ± 5%, Max. 30W	24VDC ± 5%, Max. 30W
Protection Rating	IP56	IP56
Operating Ambient Temperature	5-40°C (an optional protective housing is available for higher temperatures)	5-40°C (an optional protective housing is available for higher temperatures)
Laser Beam Diameter (mm)	3	3
Laser Class	3B	3B
Pulse Output	3 RS422-compliant differential pair outputs, max. pulse frequency 2 MHz (depending on cable length). End-user configurable as: 6 independent pulse outputs; 3× quadrature outputs.	3 RS422-compliant differential pair outputs, max. pulse frequency 2 MHz (depending on cable length). End-user configurable as: 6 independent pulse outputs; 3× quadrature outputs.
Digital Input	3 inputs	3 inputs
Digital Output	3 programmable outputs	3 programmable outputs
Standard Communication Interface	Wi-Fi or Bluetooth, RS485 (Modbus RTU)	Wi-Fi or Bluetooth, RS485 (Modbus RTU)
Optional Communication Interface	PROFINET, EtherNet/IP, EtherCAT, PROFIBUS	PROFINET, EtherNet/IP, EtherCAT, PROFIBUS
Display Communication Interface	RS485 (Modbus RTU)	RS485 (Modbus RTU)

Application

For multi-scenario measurement of copper foil, stranded conductors, and more

Downloads

Technical documents such as product manuals, datasheets and outline drawings

PDF

DLS-R Series Product BrochurePDF

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Frequently Asked Questions

Answers to frequently asked questions about Bidirectional Laser Speed & Length Gauge (DLS-R Series)

Q What is the accuracy of the non-contact length measurement system? ⌄

DALA’s laser length measurement system is based on the laser Doppler principle, with a measurement accuracy of ±0.05% and repeatability of ±0.02%.

Q My installation space is very limited, and other laser length measurement systems on the market do not fit. Can DALA support this application? ⌄

Yes. DALA’s laser length measurement system supports custom mounting brackets for different installation conditions. We can evaluate your actual production line layout and recommend a suitable installation solution.

Q What is the minimum product size supported by the laser length measurement system? ⌄

The system has minimum size requirements for the measured product. Currently, the smallest verified cable diameter is 0.2 mm.

Q Does the laser length measurement system have size requirements for the measured product? ⌄

Yes. Model selection should be confirmed based on the minimum measurable diameter and the required measurement distance/range.

Q What is the minimum product size supported by the laser length measurement system? ⌄

The system has minimum size requirements for the measured product. Currently, the smallest verified cable diameter is 0.2 mm.

Q My products come in more than ten colors, including white and black. Can DALA’s length measurement system support them all? ⌄

Different models are available for different colors and reflective surfaces. Please provide the product color, surface reflectivity, and line speed, and our team will recommend the appropriate model.

Q Can DALA’s laser length measurement system support fixed-length cutting applications? ⌄

Yes. DALA systems are already used in a variety of fixed-length cutting applications and support output signals such as pulse and digital outputs to work with cutting machines.

The final configuration should be confirmed based on line speed, accuracy requirements, cutting method, and on-site conditions.