Terdapat dua jenis peranti yang boleh digunakan untuk mengukur cahaya biru daripada sistem fototerapi yang digunakan untuk merawat hiperbilirubinemia.
Spectroradiometers – A spectroradiometer measures both the light's intensity and spectral distribution, e.g. the wavelengths of light being emitted. Spectroradiometers can be beneficial to use on light sources that tend to shift with age, however, these devices can be more complicated to use and the data may require more expertise to analyze the results, in addition to being more expensive to purchase.
Blue range filtered radiometers - Light meters measure the light levels (irradiance or band irradiance- W/cm2 or uW/cm2/nm) that will reach the patients skin when placed at the functional working distance. A complete system typically consists of a meter and sensor, filtered and calibrated to detect light within the blue range at a specific peak. Because of the varying properties between light sources and manufacturers, some will have proprietary measuring devices calibrated to their specifications. The selection of the meter/sensor with proper blue light filtration to match the light source can some times be challenging as some light source and light meter manufacturers may test different wavelengths in the 420-520 nm range with peaks varying from 450-490 nm.
