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 Photon Systems Instruments High Sensitivity FL 3500/HS Learn More Soil Moisture G4 Brass Support Washers Learn More Soil Moisture Complete G2 Series Grommet Kit Learn More OptiSciences GFL-1a Learn More