BIOE415.8 - Introduction .Thesensorsused ,respectively. ,...

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Introduction This lab required the use of a pressure sensor and a temperature sensor. The sensors used  were the 124PC and the LM335, respectively. These types of sensors are applicable to  biomedical instrumentation, since both temperature and blood pressure are indicators of health  and disease. This lab also draws upon previous knowledge, since instrumentation amplifiers are  used to amplify the output voltages from the sensors. Methods  The procedure was followed and 10V DC was used to power the op-amps. Results: 3.1: The following instrumentation amplifier was built using R g  = 1.8 kohms. The gain of the op-amp from a 0.15V test input was 29.73 V/V from a 4.46 V input signal. The  following equation governs the calculation. The pressure sensor was then attached to the three-headed spigot to apply pressure to the  sensor. We increased the pressure by variations between 10-20 mmHg (was not consistent the  entire way) and recorded the output voltage as a function of pressure. The plots are shown  below.
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Our sensor does undergo hysteresis.  Whether the pressure increases or decreases has no  bearing on the change in output voltage. From our data, we calculated the sensitivity to be 
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BIOE415.8 - Introduction .Thesensorsused ,respectively. ,...

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