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 Soil Moisture Plant Water Status Console Learn More Skye Instruments PAR Sensors Learn More Soil Moisture Specimen Holder for broad leaf Learn More Photon Systems Instruments Leaf-Clip FL 3500/LC Learn More