The robustness and convenience of Hinds Photoelastic Modulator (PEM) technology allows sensitive detection of magneto-optic signals produced by thin magnetic films. Hinds Instruments’ products for magnetic thin film development are the MOKE kits and Photoelastic Modulators (PEMs). Both the MOKE kits and the PEMs allow the user to create a set-up which will plot hysteresis loops and determine coercivity values. The MOKE kit options include photo detectors, lock-in amplifiers, polarizers, and PEMS that allow experimenters to build their own MOKE system.