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Pulse oximeters for home use are small lightweight monitors that painlessly attach to a fingertip to monitor the amount of oxygen carried in the body. An oxygen level of greater than 95% is generally considered to be a normal oxygen level. An oxygen level of 92% or less at sea level suggests low blood oxygen. In addition to oxygen level pulse rate is also displayed. Normal pulse rate values for adults 60-80 beats per minute. Heart rate can be expected to increase some with exercise and oxygen saturation may slightly decrease it should still remain at 90% or greater though.