Description
Check sample temperature at a glance. Here is a freezer rack that provides a visual indicator of temperature by dramatically changing color from yellow to dark green when its temperature is below 7° C and back to yellow when its temperature rises above 7° C. This reusable polypropylene rack has an operating range of –86° C to +121° C and can maintain a temperature of less than 4° C for almost 3-1/2 hr (with lid on) at room temperature. It accommodates twenty-four 1.5/2.0-mL tubes in a 6 x 4 array and six 0.5-mL tubes with included adapters.