LS-F100WN Laser Displacement and Ranging Sensor Module

Specifications:

• Operating Voltage: 12–24 V DC
• Output Type: NPN & Analog
• Analog Voltage: 0 - 5V
• Measurement Range: 35mm to 100mm 
• Measurement Resolution: 10µm (0.01mm)
• Light Source: Red Semiconductor Laser 
• Maximum Output : 1mW
• Pulse Duration : 5ms max
  
• waveLength : 650nm
  
• Operating Temperature: -10°C to +45°C
  

Minimum hardware to get started:

• 12V to 24V DC Power Supply : this is an industrial sensor requiring higher voltage; attempting to power it from a 5V or 3.3V microcontroller pin will result in failure to power on.
• Microcontroller or PLC : to process the incoming distance data. If using an Arduino or ESP32, you will need a corresponding RS485 or Analog-to-Digital module to interpret the signals safely.

Safety Warnings:

• Voltage Danger: This sensor requires 12V-24V DC. DO NOT connect its power output or data lines directly to a 3.3V or 5V logic pin on an ESP32, Arduino, or Raspberry Pi without proper isolation or a transceiver module, as it will instantly destroy the board.
• Current Draw: Ensure your industrial power supply can handle the startup current of the laser emitter (at least 500mA headroom recommended).

Accessories
Included in the Box:

• 1× Parma LS-F100WN Laser Displacement Sensor
• 1× 1.5m Integrated connecting cable (bare leads)

Frequently Asked Questions

• Is the LS-F100WN compatible with a standard Arduino Uno?
  Yes, but it requires voltage scaling (like a voltage divider) for the analog signal and an optocoupler for the NPN trigger to protect the Arduino's 5V pins.
• Can I connect this directly to an ESP32 or Raspberry Pi?
  No, the 12V–24V operating voltage will instantly destroy 3.3V GPIO pins without proper level shifting and isolation.
• Does this sensor work with 24V industrial PLCs?
  Yes, it is designed perfectly for 24V industrial control environments and standard PLC analog/digital input modules.
• Can I use multiple laser sensors on the same production line?
  Yes, as long as their beams are physically isolated and do not cross into each other's receiver lenses.
• What voltage does the LS-F100WN require?
  It operates on an industrial standard 12V to 24V DC power supply.
• Can I power the sensor from my microcontroller's 5V pin?
  No, 5V is insufficient to power the internal laser emitter and signal processing circuitry.
• How much current does this laser module draw?
  While exact draw varies under operation, a dedicated power supply providing at least 300mA to 500mA is recommended for stable performance.
• What type of output does the NPN wire provide?
  It is an open-collector output that sinks current to ground when the programmed distance threshold is crossed.
• How do I read the continuous distance measurement?
  You must connect the analog output wire to an Analog-to-Digital Converter (ADC) input on your microcontroller or PLC.
• Do I need a common ground between my 24V supply and my microcontroller?
  Yes, linking the grounds is mandatory for the analog and NPN signals to be read correctly and safely.
• Which Arduino library should I use for this sensor?
  No specific library is needed; simply use standard analogRead() for the distance data and digitalRead() for the NPN trigger.
• How do I convert the analog voltage to a distance value in code?
  You will need to use the map() function to translate the minimum and maximum voltage values to the sensor's specified 35mm–100mm physical range.
• Is there a MicroPython script for reading this sensor?
  Standard ADC reading scripts in MicroPython work perfectly once the voltage is safely stepped down to your board's 3.3V tolerance.
• Why is the NPN output never triggering on my MCU?
  You likely forgot to enable the internal pull-up resistor in your code or add an external pull-up resistor to the input pin.