Here are some basic questions for you to answer.

• Which sensor produces the largest voltage change as temperature changes between room temperature and body temperature?  In other words, which sensor is the most sensitive?
• Does any sensor have a voltage so small that it might be difficult to measure?
• Which sensor(s) would require some circuitry in order to make it a usable sensor (one that produces a voltage output)?
• Order the sensors from slowest to fastest as best you can.
• Which sensor do you find easiest to use?  Why?

• Compare the two methods of voltage measurement (the voltmeter and the oscilloscope):
• What do the two instruments have in common?
• How do the two instruments differ?
• Compare the three sensors.
• What do the sensors have in common?
• What are the differences in the sensors?  And, you should try to comment on why those differences could be important.