Touch and force sensing
Reads contact force up to about 10 N as a falling resistance (analog) — squeeze and touch on a gripper pad, fingertip or robot skin.
Engineering inference
Interlink Electronics
Interlink FSR 400 Small Round FSR 5 mm
Interlink FSR 400 small round force-sensitive resistor (SparkFun SEN-09673): 5.08 mm active area on a 7.62 mm head, 0.1–10 N sensitivity, 0.1 N actuation, ±2 % single-part repeatability, >10 MΩ unloaded, <3 µs rise, −30 to +70 °C, 10 million actuations, 0.35 mm thick, two 0.1 in pins. Fingertip-sized: the go-to for robot fingertips and small buttons.
30-49649Development boardPrice$10.95SparkFun · unknown
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Motor essentials
Facts about the complete product. Unknown values remain open design questions.
A good fit for
Guidance to help you shortlist. The basis is shown for each recommendation.
Grasping and manipulation
Thin force sensitive resistor fits on a gripper jaw or finger to sense contact force while grasping.
Engineering inferenceNo-load speed, rated performance and stall limits describe different operating points. A stall specification is not a continuous operating rating.
3D model & CAD
3D model & CAD files
Generated from the datasheet's dimensioned drawing and measured against it. Download the STEP to check fit in your own enclosure.
- Envelope (L × W × H)
- 38.1 × 7.62 × 0.35 mm
- Verification
- generated
- Envelope complete
- Yes
Sensing & output
Sensing area, force and output
Where it senses, over what force, and what signal it gives.
- Sensing
- force sensitive resistor
- Active area shape
- round
- Active area diameter
- 5.08 mm
- Force range (min)
- 0.1 N
- Force range (max)
- 10 N
- Output
- analog: resistance falls with force (>10 MΩ unloaded)
- Interface
- analog
- Thickness
- 0.35 mm
| Pin / wire | Position | Role | Notes |
|---|---|---|---|
| T1 | terminal | FSR terminal (male pin, 0.1 in pitch) — resistance between the two falls as force rises | |
| T2 | terminal | FSR terminal (male pin, 0.1 in pitch) — resistance between the two falls as force rises |
| Connector | Type |
|---|---|
| pins | two male pins, 0.1 in pitch (breadboard friendly) |
FSRs are for relative force (touch, squeeze) — not calibrated load measurement.
Specifications
Motor performance
No-load, rated-load and stall figures retain their separate test conditions.
Stall torque and current are not continuous ratings. Check the duty cycle and starting load when choosing the driver and power supply.
Thermal limits by level
Product operating conditions, chip ambient ratings, package case limits and junction maxima remain separate.
Motor body
- Product operating range
- -30 to 70 °C
Mechanical dimensions
Reported product dimensions may exclude protruding components. Unknown height does not establish a complete clearance envelope.
- Length
- 38.1 mm
- Width
- 7.62 mm
- Reported height / thickness
- 0.35 mm
Attached generated geometry is an approximate envelope. A generated outline does not establish an electrically verified PCB footprint.
Board connectors
| ID / type | Pins | Pitch | Notes |
|---|---|---|---|
| pinstwo male pins, 0.1 in pitch (breadboard friendly) | 2 | 2.54 mm | — |
Complete structured record
Every available field, including details beyond the summaries. Null means the value has not been established.
Sourcing & files
Supplier offers
US / USD is the target market. Observed price and stock are separate from a delivery quote.
SparkFun
US · USD
$10.95Minimum quantity unknown
- Observed stock
- unknown
- Checked
- Oct 1, 2026, 08:30 AM UTC
- Delivery estimate
- Not quoted
Observed within the last 24 hours. Confirm the current supplier quote.
Visit supplier (opens in a new tab)Delivery depends on quantity, postal code and shipping method. A dispatch statement such as “ship today” is not an arrival estimate.
Design files and references
Each source keeps its own verification status. Confirm the part revision and file contents before using it in a design.
Datasheet (opens in a new tab)
Manufacturer reference
Interlink FSR 400 small FSR (SparkFun SEN-09673) — store photo (opens in a new tab)
Unverified reference
store photo of the small round FSR
STEP (generated from datasheet drawing) — link unavailable
Generated asset
cad_check passed
Generated envelope geometry may also exist for this record. It does not replace manufacturer CAD or a verified electrical land pattern.
Source evidence
Document provenance, retrieval dates and the field groups supported by each source.
Supports: spec.constraints.thermal.operating_temp_max_c, spec.constraints.thermal.operating_temp_min_c, spec.geometry.cad.bbox.height_mm, spec.geometry.cad.bbox.length_mm, spec.geometry.cad.bbox.width_mm, spec.geometry.cad.envelope_complete, spec.geometry.cad.mesh_path, spec.geometry.cad.step_path, spec.geometry.cad.verification, spec.geometry.dimensions.height_mm, spec.geometry.dimensions.length_mm, spec.geometry.dimensions.width_mm, spec.provides.active_area_diameter_mm, spec.provides.active_area_shape, spec.provides.features, spec.provides.force_range_max_n, spec.provides.force_range_min_n, spec.provides.interface, spec.provides.output, spec.provides.sensing, spec.provides.thickness_mm, spec.usage.connectors, spec.usage.pinout, spec.usage.pinout_complete
sha256 634e2cc9ae4124f144551feaeeca133aaba481b27094308ca6c43c5939af7569
Supports: offers
FAQ
Interlink FSR 400 Small Round FSR 5 mm questions
How much does the Interlink FSR 400 Small Round FSR 5 mm cost?
From $10.95 at SparkFun. Prices are observed unit prices before tax and shipping.
What are the Interlink FSR 400 Small Round FSR 5 mm dimensions?
38.1 × 7.62 × 0.35 mm. A STEP model is available for enclosure fit checks.
Where does this Interlink FSR 400 Small Round FSR 5 mm data come from?
Every value in this record is traced to a source — 2 documents including the board and chip datasheets — with the page and table cited per value. Unknowns are left explicit, never guessed.
Sources
- Interlink FSR 400 Small Round FSR 5 mm datasheet — Interlink Electronics
- SparkFun listing