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 Original Plant Water Status Console Learn More Q-S161 RH/Temp. Sensor Learn More Photon Systems Instruments Gas Mixing System GMS 150 Learn More Soil Moisture G4 Brass Support Washers Learn More