Food standards agencies use spectrophotometers to check the purity of oils, and [Daniel James Evans] has created such a device using a Raspberry Pi. A spectrophotometer shines white light through ...

He’s built a super cheap, but very good spectrophotometer. The idea of a spectrophotometer is simple enough – shine light through a sample, send that light through a diffraction grating ...

At a price accessible to all labs, the Helium 1 µL Spectrophotometer delivers quality performance and reliable quantification of 1 µL nucleic acids and protein samples. This stand-alone device ...