
NEULOG LIGHT SENSOR GUIDE
NeuLog light sensor
NUL-204 Carolina # 369633
The Light Sensor can be used for any science experiment or activity where light
intensity measurements are required for Chemistry, Physics, Biology, Environmental
Science, etc.
This sensor can be used to take light measurements in low, medium, and high light
intensity environments such as in classrooms and in open sunlight. With both fast and
slow detectors, the sensor can be used to measure both fast light changes such as
those produced by light bulbs connected to an AC supply, as well as the light intensity
of the bulb or near steady levels outside on a sunny day.
Just a few of the thousands of possible experiments that can be done with the NUL204 sensor are: Monitoring daily light levels in ecological systems, studying
photosynthesis, chemical reactions where light is emitted, studying the effect of
changing voltage on a light source’s intensity, and light intensity with varying distances
and mediums, etc.
The unit of measure for all three data collection settings (low, medium, high) is the lux
Lux (lx, or lux): The SI unit of light intensity.
Quick start procedure:
PC or Mac Computer
Materials needed:
NUL-204 Light Sensor
USB-200 USB Module
A USB to mini USB cable (which comes with the USB-200)
Your light sensor needs to be connected to a USB-200 module. The USB-200 module
then connects to a computer via a USB to mini-USB cable. Please note that you
cannot plug the light sensor directly into the computer.
Resident PC software and browser based software can be downloaded for free at
www.NeuLog.com/dowload as well as a full software user guide. Note: Make sure not
to download and install both types of software they will conflict on the computer.
Procedure:
1. Install the NeuLog software
2. Connect the USB-200 module to the PC or Mac
3. Connect the light sensor to the USB-200 module (they directly plug
together). Please note there is no calibration required for this sensor.
4. Open the NeuLog software.
5. Once a light sensor logo appears on the left side of the screen the probe
has been automatically identified and you can begin experimentation.
6. If the light sensor is not automatically identified then click the “Search for
sensors” icon to find the sensor.
7. Select the “On-line experiment” button; this will open a graph below.
8. Click on the “Module setup” button located on the light sensor icon in the
module window to change the sensor settings if need be.
9. Click on the experiment set up button to change the experiment settings if
need be (experiment duration for example).
10. The light sensor will give a live reading in the box to the left of the screen
while plugged in.
11. To run an experiment and collect data either click “Run experiment”.
12. To end data collection early, click “Stop experiment”.
Tablet, smart phone device
Materials needed:
NUL-204 Light Sensor
WIFI-201 WIFI module
BAT-200 Battery
Your light sensor needs to be connected to a WIFI-201 module. The WIFI-201 module
will create a closed NeuLog wifi network which will stream the NeuLog data to a
device of your choosing. Once your device is wirelessly connected to the NeuLog
network you can run experiments and collect data through a browser of your choosing.
Procedure:
1. Connect the light sensor directly to the left side of a WIFI-201 module (no
wires required).
2. Connect a BAT-200 module to the right side of the WIFI-201 module.

NEULOG LIGHT SENSOR GUIDE
3. Although not required, we recommend plugging the BAT-200 to an outlet
using a USB to micro USB charger (such as a typical cell phone charger).
The WIFI-201 module will run for 15-75 minutes (depending on the sensor)
without being plugged in.
4. For further WIFI-201 instructions or the WIFI-201 quick start guide please
visit www.NeuLog.com/download.
5. The WIFI-201 indicator lights will flash; take no action until the LED to the
far left turns blue.
6. Take your tablet or smart phone and go to the Wi-Fi settings and select the
NeuLog network which matches the WIFI module ID found on the back of
the WIFI-201 device. (NeuLogXXXX for example)
7. Give your device 1-2 minutes to connect to the WIFI-201 network.
8. Once the device is connected go to your browser and type in the website
wifi201.com into the URL bar, then wait for 30-60 seconds.
9. You will see a “Control mode” icon in the browser, click on this icon.
10. The browser will then load a new screen and begin to auto detect the
sensors, this can take a few minutes.
11. If the browser does not auto detect, select “Search for sensors”
12. Once the sensor is found you will see an icon on the left side of the screen
for the light sensor. The icon will display data in real time.
13. To set the light sensor’s settings click on “Module setup” button located on
the light sensor icon on the left side of your screen.
14. To change the experimental settings click the “Experiment setup” button
(experiment duration for example).
15. To run an experiment and collect data either click “Run experiment”.
Operation with NeuLog viewer
Materials needed:
NUL-204 Light Sensor
VIEW-101 Viewing Module
BAT-200 Battery
Procedure:
1. Connect the light sensor to the left side of the viewer.
2. Connect the BAT-200 module to the right side of the viewer.
3. The VIEW-101 will auto detect the sensor and you will see it appear on the
left side of the screen.
4. Once the sensor appears it will be monitoring data in real time.
5. To run an experiment and collect data click the run button (little green
person).
Off-line experiments
(Off-line experiments are for when you do not have a sensor connected directly to a
computer, tablet, smartphone, or NeuLog viewer).
Materials needed:
NUL-204 Light Sensor
BAT-200 Battery
Materials needed to configure your offline experiment:
USB-200 USB Module or WIFI-201 WIFI module or VIEW-101 Viewing Module
A USB to mini USB cable (which comes with the USB-200)
Procedure:
1. Connect the light sensor directly to the left side of a charged BAT-200
module.
2. When ready to collect data press the “Start/Stop” button on the light sensor,
a red light will turn on for the duration of the experiment.
3. To change the experiment settings first connect to your chosen device (PC,
Mac, tablet, smart device) and select the “Module setup” button. (For more
information on how to change the experiment settings view quick start
procedure section for your chosen device in this document.)
4. After the experiment has concluded (when the “Start/Stop” button is pressed
again or the data collection period ends) connect the sensor to your chosen
device. (full instructions in each device’s quick start procedure section)
5. Open NeuLog software.
6. Click the “Off-line experiment” button.
7. Click the “Load data from sensors” button.
8. Select which experimental data to upload. (5 experimental runs can be
stored at one time on the NUL-204 light sensor)