Unico Digital Rotator Orbital Mixer RT30C is a comprehensive way to gently mix or agitate chemicals, slides, beakers, and pretty much everything else that will fit on the plate. This compact orbital mixer, an important part of any laboratory, features a variable speed motor that can be run from 20 rpm all the way up to 240 rpm. These Unico lab apparatus can be operated in any one of three modes: Constant On, Off, and Timed Mixing, which uses a digital timer that can be set for up to 100 hours. When your experiment is finished, the Unico Digital Rotator will emit a pleasant bell summoning you to the lab apparatus for assessment. The mixing platform of this orbital mixer is a relatively wide 11" x 11", complete with a replaceable rubber pad. For moisture sensitive subjects, Unico has included a sponge-equipped humidity cover with the Digital Rotator, so your specimens won't dry out. If you're mixing with a flask, the Rotator even has a small hold down spring keeping your lab glassware in place. For a highly effective orbital mixer that can handle a variety of subjects, equip your lab with the Unico Rubber Pad Digital Rotator Orbital Mixer.