Muffler (silver) and exhaust pipe on a Ducati 695 motorcycle. A muffler (silencer in English) is a device for reducing the amount of noise emitted by the exhaust of an internal combustion engine.
Quick Answer. Normal blood sugar levels should be  less than 100 mg/dL when fasting and less than 140 mg/dL two hours after eating, according to WebMD. People without diabetes tend to have blood sugar levels of around 60 to 90 mg/dL before eating.
Wait a few seconds for the meter to read the sample and provide your current blood sugar level. Record the reading in a log book for future reference. Normal blood sugar levels for most people should range from 70 to 130 mg/dL before meals and less than 180 mg/dL after meals.