GY-63_MS5611/libraries/uv-sensor

uv-sensor

Arduino sketch for analog UV sensor.

Description

Image courtesy Tinytronics

This small (type-less) UV-sensor is powered by 3.3 .. 5 V so it can be used by almost any microprocessor.

The sensor has an analogue output that is roughly linear with the UV-index (sunlight assumed, see notes)

Voltage	UV index
<0.050	0
0.227	1
0.318	2
0.408	3
0.503	4
0.606	5
0.696	6
0.795	7
0.881	8
0.976	9
1.079	10
1.170>	11

From this table the formula is derived (spreadsheet) which is pretty linear between UV 1 and 11.

Related to: https://github.com/RobTillaart/AnalogUVSensor

Notes

Note: The sensor is not calibrated and the table is indicative for sunlight (assumption!) and therefore not suitable for e.g. medical or industrial usage.

Note: UV radiation will not go through glass, so inside you will most likely always read zero. This may help to calibrate the zero level of the sensor.

Note: depending on the light source used, the table above is incorrect.

Sensitivity

The sensor is sensitive for wavelengths from 200 - 370 nm, so mostly in UVB and UVA region and less in the UVC.

https://en.wikipedia.org/wiki/Ultraviolet

Future

• verify vs calibrated sensor.
• investigate angle sensitivity (if the UV light comes from an angle).
• investigate response time to stabilize (e.g. does it react fast on clouds).
• investigate with different light sources (UVled, TL, sunlight).
• allow use of internal / external ADC.
• add a pin to control the power of the sensor (low energy applications).