Most polymerase chain reaction (PCR) devices are $50 K and up. A new company that uses "open source" (i.e. not patent-protected) technology named ChaiBio came out with a new PCR device for $5 K (chaibio.com). Without the spectrometer and the laser, Urs Gaudenz developed the thermocycling, the centrifugation, and an Arduino-compatible interface called a PocketPCR for 99 euros (https://gaudi.ch/PocketPCR/#:~:text=a.... At that price, I bought three of them, and have my students developing PCR-based tests for detecting cytokines (biochemical concentration biomarkers) and for a skin cancer test in my Basics of Making class (a class for future Galts at https://fit.instructure.com/courses/5....