[A] Identify similarities and differences between sensors, transducers, and elec

Question

[A] Identify similarities and differences between sensors, transducers, and electrodes in biomedical applications in a tabular form.

[B] Choose 2 of the 3: Provide specific examples of commercial (1) sensors, (2) transducers, and/or (3) electrodes.

[C] Select 2 commercial sensors/transducers/electrodes for a similar application, and compare/contrast their quantitative technical specifications or characteristics.

[D] Provide information that you would forward to the "purchasing department" so that they can buy one sensor, transducer, or electrode out of the set you have already described. Include a brief rationale for your selection.

Explanation / Answer

Sensor Definition:

The specific input could be light, heat, motion, moisture, pressure etc.

Examples: Oxygen sensor, Presser sensor, Ultrasonic sensor, Presence sensor etc.

Transducer Definition:

Example : Antenna , loud speaker, microphone etc.

Electrode Definition:

Example : Copper or any type of conducter.

Similarities & Differences

Ex: Oxygen Sensor

Ex: Antenna

Ex: Copper

biomedical applications vs sensors, transducers, and electrodes

it converts Oxygen levels to electrical signals.

2. Utrasonic sensor.

Convert Distance in to Electrical signals.

converts electrical signals to electromagentic signals.

Electrical signals to photograph.

Antenna made with Copper.

Film Conductor.

commercial examples:

1. Sensor:

2. Transducers:

3. Electrodes:

Sensors for temperature measurments:

1. Merecury : it is only liquid metal which expands when its temperature rises, by providing readable indications one can read teperature.

2. Semicondutor : Semiconductror diodes in reverse baos conduction only due to minority carriers which are generated due to change in temperature. by measuring change in current in semiconductor we can get he temperature. these type of sensors are used in digital sensor designs.

information to purchasing department:

Criteria to choose a Sensor:

1.     Accuracy

2.     Environmental condition usually has limits for temperature/ humidity.

3.     Range - Measurement limit of sensor

4.   Calibration - Essential for most of the measuring devices as the readings changes with time

5.     Resolution - Smallest increment detected by the sensor

6.     Cost

7.     Repeatability - The reading that varies is repeatedly measured under the same environment

1. Physical device
2. Converts converts physical inputs to human readable signals.

Ex: Oxygen Sensor

1. Physical device
2. Converts onform of energy to another form.

Ex: Antenna

1. Condoctor
2. Transfer the electricity.

Ex: Copper

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