FSR pressure sensor drift: compare the hold, release and mounted conditions

To review FSR pressure sensor drift, compare readings under a defined load, contact area and mounted temperature, with the same hold and release timing. Keep the readout circuit and firmware settings unchanged during the comparison. Record both raw output and the device's threshold state so a change in software handling is not mistaken for a change in the film.

For summer field trials, an ambient forecast or regional weather bulletin can help plan outdoor exposure. Neither gives the temperature at a sensor inside a handle, pad or enclosure. Measure that location and identify the assembly condition used for the test.

Current tactile interfaces still need a time-based sample check

In its robotics platform announcement dated 2026-10-21, NVIDIA describes force control and tactile sensing on the hands of the Agile ONE SN reference humanoid. The announced platform is scheduled for early 2027 availability. This is a physical-interface development signal, not evidence that those hands use an FSR, a Baoshengda component or a particular drift specification.

For a team considering an FSR as an auxiliary contact input in its own prototype, a tactile demonstration leaves a separate sample question: does the input remain useful throughout the intended hold, release and warm-up sequence? A sensor that detects first contact may still cross the equipment's threshold later in the same hold, or may not return to the expected released state before the next action. The announcement provides no FSR qualification data to settle that question. Define the timing and mounted conditions for your component review rather than borrowing a platform-level claim.

Separate three observations before naming a cause

Interlink Electronics' FSR 400 Series Integration Guide, EIG-10000 Rev. C defines resistance drift under a constant load and discusses consistent actuation timing, mounting and interface electronics. Its guidance is engineering background for those products, not a specification for a Baoshengda part. Agree the applicable limits and method for the actual sample.

Keep three observations separate in the test log:

• Unloaded baseline: record the output before applying the agreed load. Note any contact or preload from the housing, adhesive or actuator.
• Loaded hold: record the initial loaded reading at a defined time and its change during the hold. Keep the applied load and contact position controlled; otherwise the log combines a changing input with a changing response.
• Released recovery: record the output after removing the load and the time needed to meet the agreed released-state criterion. Do not call a delayed reset a failed force range without checking the mounting and readout.

These records describe the behavior of the tested assembly. They do not, by themselves, distinguish intrinsic film behavior from actuator creep, mounting preload or a circuit change.

Fix the comparison conditions before collecting more samples

Use a representative bench fixture and an agreed procedure. The equipment team remains responsible for device-level safety and release decisions; an auxiliary film-input screen is not a safety-function validation or calibrated force measurement.

Identify the reference and candidate sample, their drawing revisions and the load-contact geometry. Use the same support, contact location and loading direction for the paired runs. Record the actuator material and any foam, rubber or other layer between the load and the sensing area. A changed pad can change force transfer even when the sensor outline is identical.

Record the temperature near the mounted sensor, the warm-up condition and the interval used before taking readings. Compare an agreed reference condition with the intended warmer condition without changing the contact stack at the same time. If humidity or cleaning exposure is part of the intended use, identify that as a separate test condition rather than attributing every change to temperature.

Keep the supply, divider or interface values, sampling interval, filtering, calibration and trigger/reset rules identified in the record. Log raw output alongside the resulting threshold state. If the raw signal is similar but the pass/fail decision changes after a firmware revision, investigate the readout settings before rejecting the film.

Make the hold and reset decision explicit

Choose hold durations and repetition timing from the actual use: a tap, a sustained squeeze and a continuously loaded pad are different inputs. Record the ramp or loading sequence as well as the hold duration. Allow the agreed release interval before repeating the run; a different rest interval can make two otherwise similar samples hard to compare.

Set the permissible change and recovery criterion before reviewing the results. A threshold contact detector and a relative-force display need different decisions. Avoid promising a universal drift percentage or applying another manufacturer's published limit without its load, actuator, timing and environmental conditions.

When a result changes, repeat the paired comparison with one assembly or readout variable changed at a time. Retain the original run and the changed condition. If the available fixture cannot hold the required inputs consistently, record that limitation instead of assigning the difference to the sensor alone.

Start the supplier review with the uncertain condition

Review the FSR pressure sensor options to discuss film geometry, sensing-zone layout, tail direction and the proposed mounted comparison. Equipment-level threshold design, calibration and field release need the equipment team's evidence as well.

You can request a drift or sample review with an existing photo or drawing if available, the intended tap or hold use, an approximate quantity and the unresolved drift or reset question. A complete production drawing is not required for the first contact.

For the next technical exchange, add the reference/candidate identity, contact stack, measured mounted temperature, load and timing sequence, raw readings and trigger/reset settings. That gives both sides a repeatable sample question instead of an isolated reading with unknown conditions.