Hi,
when reviewing all your ambient light sensors: https://www.ti.com/sensors/specialty-sensors/ambient-light-sensors/products.html
it seems that the differences between them in terms of spectral response are minimal.
We are trying to build some low cost IoT lux sensors, that can measure illuminance as accurately as realistically possible both indoors and outdoors. Depending on the results, then make many more to use on buidlng related applications.
It is possible to obtain accurate handheld luxometers, but they are expensive and not convenient for long term monitoring wirelessly. There are some other very accurate lux sensors, but they are prohibitively expensive.
We are looking for a balance between cost and accuracy.
Based on the above:
1) Would there be any specific sensor from your line of ambient light sensors that you would rate as more appropriate for this application? Would you recommend a different sensor for indoors and another for outdoors?
(The spectral response seems very similar between all of them on the above list and there are some differences in the angular response).
2)OPT4001 SOT-5X3 seems to have the best spectral response, angular response and lux range.
In the spectral response it seems this sensor is sensitive between ~350-400nm. Is there a way to bypass this, so that the almost perfect spectral response can be utilised?
3)Would you recommend using a cosine corrector on top of the sensor, so that a proper lux measurement can be obtained?
If yes, are there any recommendations on how this should be designed so that the cosine corrector sits appropriately above the sensor?
thanks
