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FSR® 400 Series Data Sheet Force Sensing Resistors® Features and Benefits Description • Actuation force as low as 0.2N and sensitivity range to 20N • Cost effective • Ultra thin • Robust; up to 10M actuations • Simple and easy to integrate Interlink Electronics FSR® 400 Series is part of the single zone Force Sensing Resistor® family. Force Sensing Resistors, or FSR's, are robust polymer thick film (PTF) devices that exhibit a decrease in resistance with increase in force applied to the surface of the sensor. This force sensitivity is optimized for use in human machine interface devices including automotive electronics, medical systems, industrial controls and robotics. The FSR 400 Series sensors come in seven different models with four different connecting options. A battery operated demo is available. Call us for more information at +1 805-484-8855. FSR® 400 Short 5mm Circle x 20mm FSR® 400 5mm Circle x 38mm FSR® 402 Short 13mm Circle x 25mm FSR® 402 13mm Circle x 56mm FSR® 404 20mm Donut with 5.5mm hold FSR® 406 38mm Square x 83mm FSR® 408-xxx 10mm Wide x xxx mm strip xxx = 50, 100, 200, 300, 400, 500mm P/N: PDS-10004-C Human-Machine Interface Solutions for a Connected World FSR® 400 Series Data Sheet Force Sensing Resistors® Device Characteristics Actuation Force* ~0.2N min Force Sensitivity Range* ~0.2N – 20N Force Resolution Continuous (analog) Force Repeatability Single Part +/- 2% Force Repeatability Part to Part +/- 6% (Single Batch) Non-Actuated Resistance >10 Mohms Hysteresis +10% Average (RF+ - RF-)/RF+ Device Rise Time < 3 Microseconds Long Term Drift 1kg load, 35 days < 5% log10(time) Operating Temperature Performance Cold: -40ºC after 1 hour Hot: +85ºC after 1 hour Hot Humid: +85ºC 95RH after 1 hour -5% average resistance change -15% average resistance change +10% average resistance change Storage Temperature Performance Cold: -25ºC after 120 hours Hot: +85ºC after 120 hours Hot Humid: +85ºC 95RH after 240 hours -10% average resistance change -%5 average resistance change +30% average resistance change Tap Durability Tested to 10 Million actuations, 1kg, 4Hz -10% average resistance change Standing Load Durability 2.5kg for 24 hours -5% average resistance change EMI Generates no EMI ESD Not ESD Sensitive UL All materials UL grade 94 V-1 or better RoHS Compliant Specifications are derived from measurements taken at 1000 grams, and are given as (one standard deviation/mean), unless otherwise noted. *Typical value. Force dependent on actuation interface, mechanics, and measurement electronics. FSR® 400 Series Data Sheet Force Sensing Resistor® Connector Information Application Information For specific application needs please contact Interlink Electronics support team. An Integration Guide and Hardware Development Kit (HDK) are also available. FSR's are two-wire devices with a resistance that depends on applied force. Below is a force vs. resistance graph that illustrates a typical FSR® response characteristic. Please note that the graph values are reference only and actual values are dependent upon actuation system mechanics and sensor geometry. For simple force-to-voltage conversion, the FSR device is tied to a measuring resistor in a voltage divider (see figure below) and the output is described by the following equation. In the configuration shown, the output voltage increases with increasing force. If RFSR and RM are swapped, the output swing will decrease with increasing force. The measuring resistor, RM, is chosen to maximize the desired force sensitivity range and to limit current. Depending on the impedance requirements of the measuring circuit, the voltage divider could be followed by an op-amp. A family of force vs. VOUT curves is shown on the graph below for a standard FSR in a voltage divider configuration with various RM resistors. A V+ of 5V was used for these examples. Please note that the graph values are for reference only and will vary between different sensors and applications. Refer to the FSR Integration Guide for more integration methods and techniques. FSR® Model 400 Force Sensing Resistor® Model 400: Sensor Mechanical Data Active Area: Ø5.08mm Nominal Thickness: 0.30mm Switch Travel: 0.05mm Available Part Numbers: PN: 34-00007 Model 400 - No contacts or solder tabs PN: 34-00011 Model 400 - with female contacts PN: 34-44001 Model 400 - with female contacts and housing PN: 30-49649 Model 400 - with solder tabs Exploded View FSR® Model 400 Short Tail Force Sensing Resistor® Model 400 Short Tail: Sensor Mechanical Data Active Area: Ø5.62mm Nominal Thickness: 0.30mm Switch Travel: 0.05mm Available Part Numbers: PN: 34-47021 Model 400 Short Tail - No contacts or solder tabs PN: 34-00005 Model 400 Short Tail - with female contacts PN: 34-00006 Model 400 Short Tail - with female contacts and housing PN: 34-00004 Model 400 Short Tail - with solder tabs Exploded View FSR® Model 402 Force Sensing Resistor® Model 402: Sensor Mechanical Data Active Area: Ø14.68mm Nominal Thickness: 0.46mm Switch Travel: 0.15mm Available Part Numbers: PN: 44-29103 Model 402 - No contacts or solder tabs PN: 34-00012 Model 402 - with female contacts PN: 34-00001 Model 402 - with female contacts and housing PN: 30-81794 Model 402 - with solder tabs Exploded View FSR® Model 402 Short Tail Force Sensing Resistor® Model 402 Short Tail: Sensor Mechanical Data Active Area: Ø12.70mm Nominal Thickness: 0.46mm Switch Travel: 0.15mm Available Part Numbers: PN: 34-00016 Model 402 Short Tail - No contacts or solder tabs PN: 34-00017 Model 402 Short Tail - with female contacts PN: 34-00018 Model 402 Short Tail - with female contacts and housing PN: 34-00015 Model 402 Short Tail - with solder tabs Exploded View FSR® Model 40 6LQJOH=RQH'RQXW Force Sensing Resistor® Model 404 Single Zone Donut: Sensor Mechanical Data Active Area: Ø4.35mm Nominal Thickness: 0.53mm Switch Travel: 0.05mm Available Part Numbers: PN: 34-00065 Model 404 Single Zone Donut - with solder tabs Exploded View FSR® Model 406 Force Sensing Resistor® Model 406: Sensor Mechanical Data Active Area: 39.6mm x 39.6mm Nominal Thickness: 0.46mm Switch Travel: 0.15mm Available Part Numbers: PN: 34-00009 Model 406 - No contacts or solder tabs PN: 34-00013 Model 406 - with female contacts PN: 34-61152 Model 406 - with female contacts and housing PN: 30-73258 Model 406 - with solder tabs Exploded View FSR® Model 408 Force Sensing Resistor® Model 408: Sensor Mechanical Data Active Area: XXXmm x 10.2mm Nominal Thickness: 0.41mm Switch Travel: 0.15mm Available Part Numbers: PN: 34-00010 Model 408 - No contacts or solder tabs PN: 34-75319 Model 408 - with female contacts PN: 34-23845 Model 408 - with female contacts and housing PN: 30-61710 Model 408 - with solder tabs PN: 34-00068 Model 408-50 - 50mm with solder tabs PN: 34-00069 Model 408-100 - 100mm with solder tabs PN: 34-00070 Model 408-200 - 200mm with solder tabs PN: 34-00071 Model 408-300 - 300mm with solder tabs PN: 34-00072 Model 408-400 Exploded View - 400mm with solder tabs PN: 34-00073 Model 408-500 - 500mm with solder tabs Contact Us United States Corporate Office Interlink Electronics, Inc. 1267 Flynn Rd. Camarillo, CA 93012, USA Phone: +1.805.484.8855 Fax: +1.805.484.9457 InterlinkElectronics.com Sales & Support: sales@iefsr.com www.interlinkelectronics.com