The ultrasonic sensor can measure distances in centimeters and inches. It can measure from 0 to 2.5 meters, with a precision of 3 cm. It provides good readings in sensing large-sized objects with hard surfaces, but has more difficulties reading reflections from soft, curved, thin or small objects.
So how long will thawed breast milk last? If you let the breast milk thaw out in the fridge, you can keep it in the fridge up to 24 hours after it has finished thawing. (Note that it can take around 12 hours to thaw depending on how much milk is in the container and how cold your fridge is). If you warmed the thawed breast milk, do not try to hang on to it. Warmed milk is far more likely to have been exposed to bacterial growth.
Most small items (like steaks or a package of sausages) will thaw in the fridge overnight. Larger items like a whole chicken or a turkey will take longer. Plan one one full day for every 5 pounds of weight. Once defrosted, poultry, fish and ground meat will keep safely in the fridge for 1-2 days. Beef, pork, lamb, etc will keep in the fridge for 3-5 days after thawing. Defrosting with cold running water is much faster but does waste a lot of water so try to plan ahead and use the fridge.