Data Sheet

Force Sensitive Resistor (FSR)
Sensor Data Sheet
FSR 01022018
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PAGE 2 OF 3
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TRANSFER FUNCTION
The sensor requires frequent calibrations to provide reliable measurement, a constant
transfer function does therefore not exist. Please follow the instructions below to calibrate
your sensor and to convert the acquired data.
Step 1: Calculate voltage output of the sensor
!
"#$
% &
'&(&)*+
,
-
!
"#$
– Voltage output of the sensor (V)
)*+ – Value sampled from the channel
. – Number of bits of the channel
1
Step 2: Calculate sensor conductance
/ % &
!
"#$
0 1 !
"#$
&(&23
/ – Sensor conductance (mS)
Step 3: Acquire calibration signal
Compute the slope of the acquired signal using the sensor conductance computed in step 2.
Step 4: Convert data
The conductance is approximately proportional to the applied force. The force can be
computed by the equation below.
4
56
% &
/
7
4
56
– Force weight equivalent in pounds (lb)
7 – Slope of the calibration signal
PHYSICAL CHARACTERISTICS
> Weight: 8g
(in cm)
Type 1
Type 2
Type 3
Type 4
W1
0.95
3.80
1.27
0.50
W2
1.40
4.37
1.83
0.76
W3
11.00
7.60
18.3±0.5
6.4±0.5
L1
17.00
4.00
3.60
3.10
Thickness
0.02
0.05
0.05
0.03
A1
105.00
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1
!The number of bits for each channel depends on the resolution of the Analog-to-Digital
Converter (ADC); in biosignalsplux the default is 16-bit resolution (. % 80), although 12-bit
(. % 8,) and 8-bit (. % 9) may also be found.