https://www.endress.com/en/field-instruments-overview/liquid-analysis-product-overview/process-photometers?nebp.language=en&nebp.cartId=20e488b3-c7c8-49d5-95b3-2050ea1e1940
Process photometers for UV absorption, NIR, VIS & turbidity | Endress+Hauser
process photometersuv absorptionnirvisturbidity
https://www.aanda.org/articles/aa/abs/2004/40/aa0541-04/aa0541-04.html
Electronic absorption spectra of PAHs up to vacuum UV - Towards a detailed model of interstellar...