Varieties of bloodless glucose meters measure blood glucose levels with florescent technology, electromagnetic sensing, mid-infrared spectroscopy and ultrasound technology, among other technologies, reports Diabetes Healthy Solutions. Some meters also work by drawing interstitial fluid through the sweat glands in the skin by using a small electric current.
Additionally, various research groups have ascertained the blood glucose level by simply observing the electrical properties of the blood glucose. A micro-strip patch antenna can help determine the blood glucose levels by measuring the electrical properties of the sample. Electromagnetic sensing works by bouncing electromagnetic signals off the glucose molecules in the blood, which return to the device for an interpretation of how much glucose they have encountered.