Offers Up to 50% off of DynaKars We offer 50% discount on individual DynaKars and 30% discount on DynaKar teaching bundles. Logbook ML Datalogger Buy 5 or more Logbook ML dataloggers and get a 25% discount. Use coupon code ml2545. Teaching Bundles Take advantage of our teaching kits designed to offer class sets at a reduced cost. Click her to view.