Force Sensors FS Series
FSG and FSL Series
HoneywellSensing and Control11-800-537-6945 USA1F1-815-235-6847 International11-800-737-3360 Canada
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FEATURES
1 Compact commercial grade package
1 Robust performance characteristics
1 Adaptable product design
1 Precision force sensing
1 Electrically ratiometric output
1 Extremely low deflection (30 microns
typ. @ Full Scale)
1 High ESD resistance 10 KV
1 Available signal conditioning
1 Optional terminal configurations
The FS Series Force Sensors provide pre-
cise, reliable force sensing performance
in a compact commercial grade package.
The sensor features a proven sensing
technology that utilizes a specialized pie-
zoresistive micro-machined silicon sens-
ing element. The low power, unamplified,
noncompensated Wheatstone bridge cir-
cuit design provides inherently stable mV
outputs over the force range.
Force sensors operate on the principle
that the resistance of silicon implanted
piezoresistors will increase when the re-
sistors flex under any applied force. The
sensor concentrates force from the appli-
cation, through the stainless steel plun-
ger, directly to the silicon sensing ele-
ment. The amount of resistance changes
in proportion to the amount of force being
applied. This change in circuit resistance
results in a corresponding mV output
level.
The sensor package design incorporates
a patented modular construction. The
use of innovative elastomeric technology
and engineered molded plastics results
in load capacities of 4.5 Kg over-force.
The stainless steel plunger provides ex-
cellent mechanical stability and is adapt-
able to a variety of applications. Various
electrical interconnects can accept pre-
wired connectors, printed circuit board
mounting, and surface mounting. The
unique sensor design also provides a va-
riety of mounting options including
mounting brackets, as well as application
specific mounting requirements.
MOUNTING
Sensor output characteristics do not change with respect to
mounting orientation. Care should be taken not to obstruct the
vent hole in the bottom of the housing. Improper venting may
result in unstable output.
APPLYING FORCE
Evaluation of the sensor is to be performed using deadweight or
compliant force. Application of a rigid, immobile force will result
in output drift (decrease) as elastomeric seals relax. Off-center
plunger loading has minimal effect on sensor performance and
maintains operation within design specifications.
TYPICAL APPLICATIONS
1. Medical infusion pumps
2. Kidney dialysis machines
3. Load and compression sensing
4. Variable tension control
5. Robotic end-effectors
6. Wire bonder equipment
ELECTRICAL CONNECTIONS
FS SERIES CIRCUIT NOTES
1. Circled numbers refer to Sensor Terminals (interface pins).
Pin 1 J V
s
(+)
Pin 2 J Output, (+)
Pin 3 J Ground, (−)
Pin 4 J Output, (−)
2. The force sensor may be powered by voltage or current.
Maximum supply voltage is not to exceed 12 volts.
Maximum supply current is not to exceed 1.6 mA. Power is
applied across Pin 1 and Pin 3.
3. The sensor output should be measured as a differential volt-
age across Pin 2 and Pin 4 (V
o
J V
2
− V
4
). The output is
ratiometric to the supply voltage. Shifts in supply voltage will
cause shifts in output. Neither Pin 2 nor Pin 4 should be tied to
ground or voltage supply.
Force
