The Go Direct^® Turbidity (GDX-TRB) comes with 15 four sided clear cuvettes and lids.

The turbidity sensor works by infrared light being directed at a cuvette containing the sample water. This light is scattered in all directions off the particles in the water. A detector, consisting of a photodiode, is placed at a 90° angle to the light source. The amount of light being scattered directly into the detector is measured in volts and translated into turbidity units. This style of turbidity sensor is called a nephelometer.

Since the detector is placed at a 90° angle to the light source, four sided clear cuvettes are the best option for use with the Go Direct Turbidity sensor. Cuvettes that come with Vernier colorimeters or spectrometers can be used but the readings will not be as accurate.

You can purchase Plastic Cuvettes (4 sided - Clear) (CUV-4S) as a replacement as cuvettes get scratched and worn out.