dear friend
We probe the sensor of turbidity in a glass of 120 ml of 100 NTU and 800 NTU (standards).
but the sensor measure: 100 NTU= 250-500 NTU(obs300)
800 NTU= 910-940 NTU(obs300).
with the program created by shortcut.
but why there is that differences?.
You are probably getting reflections from your container.
You should be using a black plastic container to reduce reflections.