Questions the NIR AS7263

Sensors
1

Hello,

I am using the NIR AS7263 sensor to determine the Brix value in mandarin juice, and I have a couple of questions.

Currently, I am using a white LED light in a closed enclosure, but I am not sure if this is the correct light, as I have noticed significant variations between the readings taken with this light and those taken with ambient light.

  1. How should I configure the light to correctly measure reflectance and ensure that the sensor is reading accurately?
  2. Is it necessary to use a specific type of light or calibrate the sensor in any way to obtain precise measurements?

Additionally, this sensor has a measurement range of 610 nm to 860 nm, but generally, NIR spectra start at 800 nm.

  1. Could it be said that this sensor measures both visible and infrared light, given that its range includes wavelengths within the visible light spectrum (610-750 nm)?

Thank you for your help.

Best regards,

2

  1. Calibrate against your light source in the enclosed area vs the same area un-lit/dark

  2. Yes, you’ll want a light source with a small frequency output range…some white LEDs will fit the bill, but you’ll want to ensure its specs are desirable. You can also test with different ones to watch how the data shifts

  3. Yep…the only way to mitigate this is calibrating

3

You might discuss the approach with @Manuel_Crisanta, who appears to have the exact same project.