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Optical Pulse Transducer (for V71-40)
Product #: V95-01
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This transducer is a reflective photodensitometer consisting of a 940 nanometer LED light source and photo transistor in a single head. It is designed primarily for measurement of blood flow by reflective densitometry but may also be used to monitor eye blinks.
It measures blood flow by transmitting a light beam through vascular tissue which reflects off of underlying bone (as in the finger) or a reflective surface (such as the backer of an ear clip) on the other side of the tissue. The reflected beam of light returns to the sensor head and causes the photo transistor to conduct in proportion to the amount of light received. As blood surges through the tissue, the opaque components of the blood interfere with the passage of light and create the signal.
It has been used successfully to monitor eye blink in adult and infant humans using eyeglass frames, helmets, and restraint fixtures. The unit is supplied with finger and ear clips.
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