Magnetic Stirrer Photon Systems Instruments Categories Crops , Photosynthesis, Chlorophyll & Respiration Brochure Send Enquiry Overview PSI Magnetic Stirrer designed to provide continuous stirring with little speed deviation and minimal heat build-up. A handy accessory to the PSI Fluorometers. Back Our Related Products Eijkelkamp 19.04 Automatic Porometer Model AP 4 Learn More Photon Systems Instruments AquaPen-C AP-C 100 Learn More Photon Systems Instruments LED Light Source SL 3500 Learn More Spectrum Technologies Digital Refractometer Learn More