Interlink Electronics FSR 400 Series - Manual (Page 33)

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31
FSR
®
Integration Guide
What drive voltages can I apply to the sensor?
Electrically the sensors look like passive resistors. Any voltage that suits your circuit is
fine. From 0.1V (as long as signal-to-noise (S/N) ratio remains acceptable) to 5V is the
typical range.
What is the resistance range of the sensor?
The resistance range of the sensor is typically from >1MΩ at no load to approximately
1kΩ at full load. This can vary depending on the details of the sensor and actuating
mechanics.
How long must the sensor be unloaded before you load it again?
There is no exact or estimated time.
Are the Interlink sensors waterproof?
No, the sensors are not designed for use under water. The FSR material is not
compatible with direct liquid contact. Sensors are ideally suited to placement behind a
waterproof enclosure.
Does humidity have any effect on the sensor?
Yes, of all environmental extremes humidity causes the most change. Extreme humidity,
for example 85 RH at 85C for hundreds of hours, will shift resistance dramatically
upward.
Can the sensors pick up electrical noise?
FSRs are no more prone to noise pickup than a passive resistor, although they can have
considerable surface area. Proximity to high intensity RF sources may require special
measures.
What is the smallest active sensing area you can make?
The minimum head dimension for our sensors can be 5mm (3mm active area).
What are the minimum and maximum quantities you can do annually?
Due to the cost involved, we typically do not design custom sensors for when expected
volumes are low. The maximum quantities that can be produced depend on several
factors. We have produced specific sensors in volumes as high as 20M pieces per year.
What is the average cost of a custom design?
Each request is different, depending on size, complexity of design, force ranges,
quantities, etc. Contact an Interlink sales agent for pricing.