The benchtop Excella E24 incubator shaker and model E24R with added refrigeration accommodate test tubes or flasks up to 2.8 liters in a tightly-sealed growth chamber featuring a clear acrylic lid for excellent visibility of all samples. A wide variety of platforms, clamps and test tube racks provide for unlimited flexibility.The Excella E24 and E24R offer field calibration of temperature and speed through the microprocessor-controlled touch pad.