Methods, systems, and apparatuses for accurate measurement of health relevant UV exposure from sunlight

A UV detector, comprising:

• a sensor sensitive to incident UV light,
• a first environment (E1) that includes unfiltered sunlight and a second environment (E2) that includes one of a first, second, and third notch filters having transmission centers at 300 nm, 310 nm, and 320 nm, respectively,
• wherein when the sensor is exposed to E1, and E2 with each of the three filters, a sensitivity of the sensor (S) is characterized as a percent change in an output of the sensor between E1 and E2 with each of the three notch filters, the sensor thereby having a S300, a S310, and a S320,
• and wherein a relative “R310 minus” sensitivity of the sensor is characterized by S310/S300 and wherein a relative “R310 plus” sensitivity of the sensor is characterized by S310/S320,
• and wherein at least one of R310 minus and R310 plus is greater than 15.