Why is sensitivity of instrument important?

Why is sensitivity of instrument important?

Sensitivity refers to the ability of measuring device to detect small differences in a quantity being measured. High sensitivity instruments may lead to drifts due to thermal or other effects, and indications may be less repeatable or less precise than that of the instrument of lower sensitivity.

What does sensitivity mean in measurements?

Sensitivity is an absolute quantity, the smallest absolute amount of change that can be detected by a measurement. This means that at 1 volt the equivalent measurement is 1000 units or 1 mV equals one unit. However the sensitivity is 1.9 mV p-p so it will take two units before the input detects a change.

What do you mean by sensitivity and precision of an instrument?

It is the ratio of change in output (or response) of the instrument to change in input or measured variable. A higher sensitivity indicates that the system can respond to even the smallest input.

What is difference between resolution and sensitivity?

RESOLUTION – the smallest portion of the signal that can be observed. SENSITIVITY – the smallest change in the signal that can be detected.

How do you measure the sensitivity of a measuring instrument?

Using your recorded data, calculate the difference of the two voltage measurements and the two current set points. Then, divide the difference in volts by the difference in amperes. The result is a sensitivity coefficient of 0.1 Volts per Ampere.

What is the relationship between sensitivity and range?

= Sensitivity Output voltage Input voltage Page 4 Sensitivity (example) “SENSITIVITY” of a lock-in is in fact the upper limit of the measurement range. Ratio between the largest and smallest possible values of a changeable quantity. It is measured as a ratio or as a base -10 or -2.

Which measurement is more sensitive?

Also, a recorded measurement with more decimal places is considered more sensitive than a recorded measurement that has fewer decimal places. Example: a measurement of 2.37 mm is more sensitive than 2.3 mm.

What is the difference between sensitivity and accuracy of an instrument?

Sensitivity should not be confused with accuracy—they are entirely different parameters. For example, a device specified with 1-mV sensitivity may only be accurate to 10 mV with an applied input of 10 V. Yet if the 10-V input signal changed by 1 mV, the device still could observe the difference.

What is the difference between sensitivity and accuracy?

Sensitivity evaluates how good the test is at detecting a positive disease. Accuracy measures how correct a diagnostic test identifies and excludes a given condition. Accuracy of a diagnostic test can be determined from sensitivity and specificity with the presence of prevalence.

What is accuracy and sensitivity?

What is the definition of sensitivity and dynamic range?

For a given bandwidth, the cascade NF defines the sensitivity of the receiver and determines the lowest input RF power that can be detected by the receiver. The dynamic range (DR) of a receiver is the measure of the receiver’s ability to handle a range of signal strengths, from the weakest to the strongest.