Quantum Devices Inc.

quantum devices, inc. (qdi) barneveld, wi, was established as a wisconsin corporation in october 1989, as an outgrowth of activities in the general area of optoelectronics. these products include application specific silicon photodiodes, optical encoders and light emitting diodes (led) for commercial, industrial and medical applications. qdi's photodiodes and led's are used in instrumentation for photosynthesis and photobiological research, biomedical and medical instrumentation for measuring blood sugar levels (glucometer), oxyhemoglobin and pulse rate (pulse oxymeter). incorporating qdi's patented sensor technology, our qphase™ family of encoders feature high resolution, increased frequency response and superior reliability over temperature (0 to 120 degrees c). qdi incremental encoders set a new standard and are backed by a 2 year factory warranty. the qphase™ series offers line counts up to 20,000 ppr and sinusoidal outputs. rounding out the qphase™ series is the qm35 and qml35 our