App note: Trimmers interfacing with surveillance system sensors

App note from Bourns about the robustness of trimmers used on surveillance system, typically sealed to protect agaisnt harsh environment. Link here (https://www.bourns.com/docs/technical-documents/technical-library/trimmers/application-notes/bourns_trimmers_interfacing_with_surveillance_system_sensors_appnote.pdf?sfvrsn=1deb5bf6_11) (PDF)

Trimmer technology is designed for use in applications where the unit must be calibrated before it is shipped to a retailer, and eventually the end user. Typically, these pre-calibrated electronics use a trimmer for required adjustments to account for component variations over time. Medical and industrial designs frequently take advantage of the system calibration convenience of a trimmer. In surveillance systems, the trimmer is adjusted to obtain the best resolution of the sensors at an installation point.