Keysight
4261 A LCR Meter
Provisional entry — research in progress
This page was generated automatically from cited public sources and hasn't completed the full research pass yet. Every specification shown carries its source; more detail is added as research completes.
The Keysight 4261 A LCR Meter is an LCR meter. The Keysight 4261 A LCR Meter measures capacitance, inductance, resistance, and dissipation factor. The Keysight 4261 A LCR Meter measures at test frequencies of 120Hz and 1kHz.[1]
What it is
General reference — not yet source-verifiedAn LCR meter is a bench instrument used to characterize the electrical behavior of passive parts and other impedance-bearing devices. LCR meters are used in laboratories, incoming inspection, failure analysis, and electronics manufacturing where capacitance, inductance, resistance, and loss behavior need to be checked.
How it works
The 4261A measures at test frequencies of 120 Hz and 1 kHz. The 4261A uses a five-terminal connection configuration between the component and the instrument. The 4261A supports both parallel and series equivalent circuit measurements. The 4261A displays measured values on two three-full-digit LED displays on the front panel.[1][3]
Where it fits in the process flow
General reference — not yet source-verifiedLCR meters are used around semiconductor and electronics production where discrete components, substrates, fixtures, and packaged parts need electrical characterization. LCR meters typically sit outside patterning or deposition tools and support engineering, quality, and test activities before assembly, during process development, and after build completion.
Applications
The 4261 A LCR Meter measures capacitance, inductance, resistance, and dissipation factor for passive components and other impedance elements. The instrument measures inductance-dissipation factor, capacitance-dissipation factor, and resistance. The 4261A is intended for component measurements.[3][4][5]
What do the numbers mean?
Vintage & configurations
What does it need to run?
Site utility requirements, footprint, and infrastructure needed to install and operate this tool. Sourced from public records.
Where are the manuals?
Generated from public-source data on file. Enter your email to access — nothing is published; details are routed privately.
Not publicly documented
Field notes
No research found yet — worked with this tool? Share what you know.
Frequently asked questions
Not publicly documented
The following facts about the 4261 A LCR Meter are absent from this record as of this revision. First-hand knowledge or a citation closes a gap; every submission is reviewed before publication.
No publicly documented production dates or lifecycle milestones (introduction, end of production, EOL) for the 4261 A LCR Meter are on record.
Answerable by: OEM historical records or a trade-press announcement
The control-system platform and OS era of the 4261 A LCR Meter are not on record.
Answerable by: an engineer who operated it or OEM installation records
No publicly documented failure modes or field errata for the 4261 A LCR Meter are on record.
Answerable by: a field service engineer, process engineer, or maintenance technician
The process node or technology generation of the 4261 A LCR Meter is not on record.
Answerable by: an OEM datasheet or a fab qualification report
No publicly documented compatible parts, consumables, or accessories for the 4261 A LCR Meter are on record.
Answerable by: an OEM parts catalog or a service engineer
No research found yet — worked with this tool? Share what you know.
Sources & citations
Sources (5)Every fact above is drawn from these public sources
- [1]lost-manuals.com — lost-manuals.comlost-manuals.com
- [2]Inventory photo
- [3]waferpedia.com — waferpedia.comwaferpedia.com
- [4]4261 A LCR Meter — Agilent | Specs, Sourcing & Service | Waferpedia — waferpedia.comwaferpedia.com
- [5]Agilent/ HP 4261A LCR Meter - Calright Instruments — calright.comcalright.com
Last updated Oct 20, 2026.
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