Open Colorimeter Plus Introduction
The Open Colorimeter Plus is our new expanded variation of the original Open Colorimeter. Like the Open Colorimeter it also measures absorbance, but the main uses are for fluorescence and turbidity measurements. In addition to the light sensor on the Open Colorimeter, we have added a second measurement sensor at 90° which means it can also measure light-scattering and fluorescence. In assition, the LED boards are through-hole LEDs for increased light intensity.
The Open Colorimeter Plus uses a right-angle (R/A) or 90° measurement sensor as described in previous posts. This design extends the types of measurements the Open Colorimeter can perform to include fluorescence and light-scattering e.g. turbidity. Recently we added a second light sensor positioned at 180° i.e. facing the LED board. This 180° sensor measures the output light intensity from the LED which can then be used in different experimental approaches such as normalizing data to the applied light-intensity.
Light Scattering & Turbidity
How does light-scattering work?
Applications here:
Water quality -
Aquariums -
Home brewing & Beer Haze -
Turbidity test for measuring water clarity/cloudiness. These tests are performed by comparing water samples to a turbidity standard. One method for performing turbidity tests is based on measuring the amount of light-scattering by suspended particles in the sample. The higher the amount of suspended particles or turbidity, the greater the amount of scattered light.
In addition to water-quality testing, a lab-based turbidity instrument can be used for any turbidimetric assay (e.g. these sulfate or potassium tests) and by home-brewers for measuring beer haze and/or monitoring yeast growth.
Read more here ....
Fluorescence measurements
How does light-scattering work?
Research here