SLS Series for non-contact, bidirectional speed and length measurement

SLR Series of bidirectional, speed and length gauges provide extremely accurate non-contact speed and length measurements in almost any production environment.

Automatic direction detection and measurement down to zero speed means that the SLR gauge length measurement counts both up and down, so the final length measurements will still be accurate to 0.05% even with production lines that exhibit stoppage, direction reversal and creepage.

Production processes for wire, cable, web products, woven and non-woven materials, paper, paper tube winding, plastic film, tapes, building materials, floorings and labelling can all be measured using the laser Doppler method.

Applications requiring a precise cut-to-length process benefit from the non-slip and highly accurate laser measurement technique which reduces scrap, increases uptime and improves material yield by eliminating product “give away” or “short length” claims.

The SLR Series gauges are money-saving, direct replacements for traditional problematic and high-maintenance contact wheel and roller-type devices and are extremely easy to install and operate.

Find out more about our other speed and length measurement solutions or contact us to discuss your requirements with a Scantron expert.

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Minimum speed(m/min)0 (Zero Speed)0 (Zero Speed)0 (Zero Speed)0 (Zero Speed)
Maximum speed(m/min)2500500050001000
Stand-off distance(mm)1503006001200
Depth of field(mm)256060120

All models above also have the following specifications:

Direction detectionAutomatic
AccuracyBetter than 0.05%
RepeatabilityBetter than 0.02%
Measurement update rate40µs (0.04ms) [1 measurement = 1 scan]
Power requirement15 -25Vdc, 20 Watts
Protection ratingIP67
Temperature range5°C ~ 40°C
Gauge dimensionsL220 x W140 x H90mm
Gauge weight3kg
Laser spot size4mm diameter
Units of speedm/min, ft/min
Units of lengthm, ft, yd
5x digital inputs2 fixed: Laser enable; Optical shutter enable
3 programmable: Reverse direction; Length hold; Display hold; Speed hold;
Reset (length or reel number); End of reel. Max input 24Vdc
Max Input: 24Vdc
3x relay outputsVolt-free contact; Max. voltage 50Vdc 0.5A
Gauge OK, Gauge measuring, Laser on, Laser at temp, Shutter open
(Status indicators) Preset length 1, Preset length 2
Serial I/OSelectable RS232, RS485, RS422: Speed, Length, GR, (status indicators). Bluetooth
CANBUSConnects to Proton products range of SiDI AiG2 & AiG3 indicators
Can be used to supply power to gauge head
Analogue output 0 - 10Vdc scaleable output based on speed or on good readings
3x pulse outputsOpto-isolated differential outputs, configurable as quadrature or index
Default output 5V or user input to 24Vdc max. Max. Pulse output up to 1Mhz
Additional protocolsProfibus, Ethernet, DeviceNet, Modbus, ProfiNet, Industrial Protocol, and SSI available

The SLR Series can be used in almost any production environment. It provides Doppler bidirectional speed and length measurement:

  • Non-Contact, high speed, solid-state laser speed and length measurement with no slippage, drift or mechanical wear and greatly reduced maintenace compared with contact wheel/roller systems
  • Bidirectional speed and length measurement; accurately measures speed and length during line stoppage, reversal and creepage
  • UKAS-traceable calibration; accuracy better than 0.05% and repeatability better than 0.02%
  • Rugged industrial design for use in harsh factory environments
  • Available fitted with industry-standard communications interfaces for easy integration with PLC’s and production line equipment
  • Excellent value with low cost of ownership

The SLR is a very versatile piece of equipment and is suitable for a wide range of applications.

Here’s a short list of some of the industries where our customers have benefited from our non-contact laser measurement systems:

  • Flooring and carpet
  • Abrasive paper
  • Roof foil
  • Adhesive tape
  • Cold metal
  • Paper mills
  • Paper tube winding
  • Packaging material
  • Construction & insulation material
  • Special extrusion and calendaring
  • Ceramics
  • Cord, lead
  • Stranded products
  • Insulated products

The following are some of the applications covered:

aig2-sl1AiG2-SL - Display module
Connects via the CAN-bus port
Displays measured speed and length
Provides menu-based setting of all parameters
Bright vacuum fluorescent dot matrix display
Mounts directly on the gauge body or remotely via an extension cable
can-busCAN-bus cable - For connecting the gauge to an AiG2 interface display unit
Available in 5, 10, 15, 20, 30 and 50m lengths
psu-bobPSU-BOB-SL - Power supply, break-out box and laser safety key switch
Connects via the DB25 “INTERFACE” connector
Supplies 24VDC electrical power to the gauge
Provides screw terminal access to all “INTERFACE” connector input and output pins
End user cables are sealed with three cable glands
Provides a laser enable key switch for compliance with laser safety requirements
Input voltage range: 90 – 260 VAC @ 45 – 65Hz
db25DB25 Cable - For connecting the gauge "INTERFACE" port to a PSU-BOB-SL, Terminal Strip-DIN or CS1G-SL
Available in 3, 5, 10, 20 and 30m lengths
rj45RJ45 to DB9 converter
For connecting RJ45 8P8C terminated cables to the DB9 EtherNet/IP port
pcis-softwarePCIS_SL - PC Interface Software
PC-based software package
User-friendly graphical user interface
Displays all measurements
Provides menu-based setting of all parameters
Provides trending, data logging, pre-sets and alarms
Gauge to PC connection via RS-232 or optional RS-232-to-USB interface cable (RSCon)
sl-laser-guardSL Laser Gaurd PHA1 - LAser safety enclosure for PHA-1 (with or without side skirts)
Mounts to a PHA-1 to prevent accidentla viewing of direct and reflected laser beams
Integrated interlock switch engages the gauge laser shutter whenever the guard cover is opened
Side skirts contain reflected laser radiation from highly-reflective objects
air-wipeAir wipe SLMKII
Provides a constant flow of clean air over the laser window to disperse dust, debris or steam
Easily detached by a quick release screw for cleaning
Provides an 8mm push fit tube fitting to connect to a clean air source