NeuLog NUL-231 Manual

NeuLog turbidity logger sensor
NUL-231
The NeuLog Turbidity Sensor can be used for any science experiment or activity using
samples with suspended particles in liquids such as in the fields of Chemistry, Biology,
Microbiology, Earth Science, Environmental Science, Biochemistry, etc.
Turbidity is a measurement of the concentration of suspended particles in a solution.
The particles could be anything from sand, and non-dissolved nutrients to bacterial
cells. When a liquid is turbid, it is often referred to as cloudy or hazy. This sensor
measures turbidity by measuring sending a beam of light though a cuvette and
measuring the unelected light from the beam.
The sensor comes pre-calibrated so you can start experimentation right out of the box
using any of the following guides. Three cuvettes with lids come packaged with the
sensor, which load directly into the opening on the sensor's faceplate.
Just a few of the thousands of possible experiments that can be done with the NUL-
231 sensors are: Monitoring of ecological systems, bacteria or yeast culturing,
studying colonies of Protozoa, environmental health testing, water quality testing, etc.
The turbidity sensor can take measurement with the following units of measure:

NTU – Nephelometric Turbidity Unit
Cuvette usage and handling:
It is important to maintain a standard for cuvette usage as their quality will directly
make an impact on the results of your experiments. If the cuvette has fingerprints,
smudges, or cracks the sensor will detect them and give off an improper turbidity
reading. Smudges left from handling can easily be wiped off with tissue paper.
Proper usage:
1. Carefully remove the cuvettes from their packaging.
NEULOG TURBIDITY LOGGER SENSOR GUIDE
2. Load your liquid sample into the cuvette before placing it into the sensor to
prevent spilling and damaging the sensor.
3. Plug the cap into the cuvette and gently invert a few times. Shaking will
create air bubbles which will be detected by the sensor and give an
incorrect reading.
4. Before placing the cuvette in the sensor; hold the cuvette as far toward the
top as you can and wipe the bottom portion of the cuvette off with a tissue.
Do not touch the bottom of the cuvette again as this will leave a residue
which will affect the results of the experiment.
Load the cuvette into the square hole located on the sensor's faceplate and
5.
press down gently to slide the cuvette into place.
6. After experimentation, empty your samples and gently rinse out the cuvettes
with distilled water and then let the cuvettes air-dry.
Quick start procedure:
PC or Mac Computer
Materials needed:

NUL-231 Turbidity Sensor

Cuvettes + Cuvette Lids

USB-200 USB Module

A USB to mini USB cable (which comes with the USB-200)
Your turbidity 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 turbidity 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