Sensors for National Instruments DAQ

Light and Laser Sensor

The LSN-100 light and laser sensor combines a laser and a light sensor in the same unit. Each LSN-100 will come with reflective tape, which the laser will be focused onto. The sensor can be placed up to 1 foot away from the tape. When the beam between the laser and tape is broken a corresponding signal will appear in the recording screen.

The student can use just one sensor to study objects such as a pendulum, or two can be used for a variety of other experiments.

Output Range




Default scaling Value


Laser Wavelength


Laser color


Measurement Instructions
1. Install the IX-ELVIS board into the National Instrument ELVIS platform or the IX-myDAQ board onto the NI myDAQ. If using ELVIS, connect the ELVIS power supply to the ELVIS unit and connect it to the computer via a USB cable. Ensure both of the power switches are in the “on” position. For the myDAQ, connect it to the computer using the USB cable.

2. Connect the MINI DIN7 connector of the LSN-100 to either CH1 or CH2 of either the IX-ELVIS or IX-myDAQ board.

3. Open the recording software, select the channel that the LSN-100 is connected to and ensure the range is set to +/-5V.

4. Set up the sensor and the tape so that the laser is focused on the tape and the object is in between the tape and the sensor.

5. For a pendulum, set the beam in the path at the lowest point of the swing.

6. The voltage goes up when the laser is shined on the light sensor and down when the path is blocked.

*Note: The signal may be inverted when using the myDAQ setup.
  • Model: LSN-100

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