Stainless-steel exterior provides a clean professional look with surface that avoids fingerprint smudges.Readily stackable same-size units without the need for tools or kits.Access port with silicone plug for independent data logging or for using small equipment inside the unit.Flexible shelving system with different positions to optimize chamber space.Large easy-to-view fluorescent display with intuitive microprocessor controller.Internal glass door for undisturbed sample viewing