InteliSENS® SL mini Series


InteliSENS® SL mini Series

Speed & Length Measurement

The InteliSENS® SLmini non-contact speed and length measurement gauge is ideal for flat surface products in “roll to roll” or “cut to length” processes. Paper, Film, Foil, Wovens, Non-Wovens, Textiles, Roofing, Sidings, Gypsum Board are just a few examples. Applications where speed measurement is critical for drive control or where length measurement is critical for product quality will benefit from the increased accuracy of Laser Doppler Speed and Length Measurement.
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  • Incredibly small and easy to install
  • Pulse outputs like your encoder
  • Digital Communications you need
  • Stand Alone Measuring Device or Fully Integrated to PLC

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  SLmini 1220 SLmini 3060
Stand Off Distance 120mm
Depth of Field 20mm
Minimum Speed 0.1 m/min
0.33 ft/min
0.25 m/min
0.82 /ft/min
Maximum Speed 2000 m/min
6562 ft/min
5000 m/min
16404 ft/min


Factory Calibrated to better than 0.05% within the central 20% of the Depth of Field.
Repeatability of 0.02%


Maximum Acceleration Rate of 1000m/s2 (3280ft/s2)
Measurement Rate Up to 50,000/sec (20us)


Speed Measurement selectable m/min, ft/min, yd/min
Length Measurement selectable m, ft, inch, yd

Material Present

For part length measurement


Pulse Outputs x 3

RS422 Differential Pair Pulse Outputs Configurable as Quadrature or Index
Default Output 5vdc or User Input to 24vdc Max
2MHz Max Pulse Output Rate

Logic Input x 2

Non Isolated, Normally Open (High State) Pulldown Logic Inputs
Maximum Voltage: +/-30V Minimum Current 3mA
Reverse Direction, Length Hold, Display Hold, Speed Hold, Total Length
Reset, End of Reel / Batch Length Reset

Relay Outputs x 3

Maximum Voltage 25Vdc Current 0.1A
Gauge Ok, Object Detected, Gauge Measuring, Good Readings Low,
Gauge Temperature High, Preset Length 1, Preset Length 2

CANbus x 1

RS232 Modbus Communications
USB using RS232 - USB Converter Cable
ZM4000 Printer Communications

CANbus x 1

Connects to Proton Products CDi4 Display

i-BUS x 1

Connect to a PC or Mobile Device and use the Proton Products Gauge
App available for iOS and Android. Ideal for gauge configuration and

i-BUS x 1

Ethernet TCP/IP Modbus is the Default Communication. Connect to a PLC using optional ProfiBus, ProfiNet, EtherNet I/P or DeviceNet.

Image Image Image Image

Laser Doppler

Class 3B Visible Laser.
Wavelength 650 - 670 nm, typically 658 nm with a beam diameter of 3mm (0.12”)
Total emitted power 40mW. Power Density at Stand Off Distance 50mW/cm2 

Laser Doppler

Electrical and Operating Requirements

Power Supply
15 - 28 Vdc 

Power Consumption
15 Watts 

Operating Temperature
5°C - 40°C (41°F-104°F)*

*See Accessories for High-Temperature protection options

Environmental Protection
IP 67

Size and Weight


142mm (5.6”)

104mm (4.1”)

53mm (2.1”)

3kg (6.6lbs)