Finger Pulse Oximeter Price in Bangladesh. LK87 fingertip pulse oximeter helps you keep track of your health. Through the use of a finger, it may detect blood oxygen saturation and heart rate. For pulse strength bar graph, saturation oxygen, and pulse rates, it has an OLED display. This is a small, portable device that measures the quantity of oxygen in the bloodstream. It attaches gently to your fingertip and analyzes your pulse rate by sending two wavelengths of light via the finger. It is able to determine accurately your Sp02 blood oxygen saturation levels, pulse rate, and pulse strength in 6 seconds.