# Oscilloscope and force sensor

#### pj33000

Joined Feb 1, 2021
2
Hello,

I have a question about how can the oscilloscope can be used with a force sensor.
The output of a force sensor is an electrical signal. When I feed this signal to the oscilloscope I get a wave with a certain amplitude of some mV.
How I am expected to use the oscilloscope to calculate the input force?
Shall I first run the experiments using some known weights to record the average output voltage and determine a calibration coefficient?
However, I believe this is only valid for linear relationships. How can I know that something is linear over the whole range the experiment will run?

#### MrChips

Joined Oct 2, 2009
25,022
Assuming that the sensor responds to static loads, you can use a DC voltmeter to measure the output voltage.

The only way that I know of to check for linearity is to apply a series of known weights spanning your range of interest. Tabulate the voltage reading vs the load and plot the graph of voltage vs weight.

#### pj33000

Joined Feb 1, 2021
2
Assuming that the sensor responds to static loads, you can use a DC voltmeter to measure the output voltage.

The only way that I know of to check for linearity is to apply a series of known weights spanning your range of interest. Tabulate the voltage reading vs the load and plot the graph of voltage vs weight.
Great thank you!