PTI Fluorescence System Photon Technology International QuantaMaster Steady-state Fluorometer System upgraded in 2012; Currently running Felix GX software. Magnetic stir control Temperature controlled using circulating water bath. Applied Photophysics SX20 Stopped-flow Fluorescence Spectrometer SX Pro-data system upgrade in 2012 Dual detectors Fluorescence Polarization attachment Temparature controlled using circulating water bath.