barometer
Enable an AI agent to recognise a barometer, assess whether its atmospheric-pressure readings are usable, and decide how it may be read, positioned, checked or serviced.
Bundle → Layer → Finding → Questions Filled
5 bundles · 9 layers · 9 findings · 17 questions
Pressure-sensing identity Establishes what senses atmospheric pressure and how that sensing produces the observed indication.
Sensing principle
Identifies the pressure-sensitive mechanism and its reference.
Atmospheric-pressure function
Record evidence that the instrument is intended to measure atmospheric pressure and identify its sensing mechanism.
- What documentation or physical features establish that this instrument measures atmospheric pressure? definition
- What sensing mechanism and pressure reference does this instrument use? definition
Sensor and indication
Connects the physical sensor to the dial, column, screen or transmitted reading.
Reading origin
Identify the sensor responsible for each indication and separate pressure measurement from adjacent functions.
- Is this indication produced by an internal sensor or received from a separately identified instrument? provenance
- Which outputs indicate pressure, and which instead express altitude, weather labels or other derived quantities? boundary
Pressure reading and reference Preserves the observed pressure and the transformations needed to interpret it.
Observed indication
Captures what was actually read and when.
Pressure observation
Record the pressure value, unit, acquisition time and limits imposed by the indication.
- What pressure value and unit were indicated at the recorded observation time? measurement
- What scale division, display increment or acquisition interval limits interpretation of this observation? measurement
Reference and corrections
Explains whether the indication is local pressure or a corrected value.
Reported pressure basis
Record the pressure basis and any applied corrections without treating configuration changes as atmospheric changes.
- Does the indication represent local absolute pressure, sea-level-reduced pressure or another documented basis? definition
- Which elevation, temperature, offset or other correction settings affected this reading, and where are their methods documented? provenance
Atmospheric exposure and installation Connects the measurement to the air being sampled and the instrument's placement.
Sampled air
Identifies the air volume communicating with the sensing element.
Ambient-pressure path
Record the pressure path and evidence that it represents the intended atmosphere.
- Which room, enclosure or outdoor air volume communicates with the pressure-sensitive element? boundary
- What evidence indicates an unobstructed pressure path or possible influence from enclosure pressure, ventilation or airflow? measurement
Placement conditions
Records installation details that affect this instrument's interpretation or operation.
Installation suitability
Assess elevation, orientation and environmental conditions against requirements for the identified instrument.
- What are the instrument's elevation, orientation and relevant environmental conditions? measurement
- Does its documentation require repositioning, levelling or an equilibration period before readings are used? action
Measurement trust and intervention Determines whether readings are credible and which checks or interventions are appropriate.
Calibration and comparison
Establishes evidence for measurement quality using compatible reference observations.
Pressure agreement
Record calibration evidence or comparison results with matching pressure bases and relevant conditions.
- What calibration or reference-comparison record supports the instrument's current measurement quality? provenance
- After accounting for time, elevation and pressure basis, what discrepancy and uncertainty remain? measurement
Faults and permitted actions
Links observed defects and instrument construction to reading restrictions and servicing decisions.
Reading validity and service
Record symptoms such as a stuck indication, interrupted liquid column, blocked port or electronic fault, and identify documented responses.
- Which observed symptoms make this reading suspect, invalid or unavailable? measurement
- Which checks, adjustments or servicing actions are documented and authorised for this mechanism and its contained materials? action
Evidence and external alignment What the world already says about this thing, gathered so the model can be checked against it.
Reported evidence
Findings from the breadth pass, kept separate from the structural claims.
Kinds and varieties
Reported by the breadth pass; each item needs checking against its source before it becomes normative.
- Which of these kinds and varieties hold for the sense of barometer this model covers, and on what evidence? provenance
Classifiers Filled
- Family
- Thing Registry
- Category
- Physical world and living systems
- Entry kind
- thing
- Plane
- PHY
- Domain
- PHY.OBJ
- Other names and narrower kinds
- aneroid, mercury barometer, microbarometer
What it is Filled
A barometer is a scientific instrument that measures atmospheric pressure, typically to forecast weather, determine altitude, or provide a pressure reference for calibration and process control.
In scope
- Instrument identity and atmospheric-pressure sensing mechanism
- Pressure readings, units, timestamps and reference basis
- Exposure to ambient air and installation conditions
- Calibration, compensation, faults and reading uncertainty
- Instrument-specific reading, adjustment and servicing constraints
Out of scope
- Weather systems, forecasts and meteorological observations beyond this instrument
- Altitude determination and navigation performed using pressure
- General-purpose pressure gauges for vessels, pipes or process systems
- The complete weather station or building containing the barometer
- Regional pressure datasets and their aggregation services
Why it exists Filled
Enable an AI agent to recognise a barometer, assess whether its atmospheric-pressure readings are usable, and decide how it may be read, positioned, checked or serviced.
Distinguishing features Filled
- Its intended measured quantity is atmospheric pressure; a device intended to measure pressure inside a process line belongs to a neighbouring pressure-instrument model.
- Its sensing arrangement measures ambient pressure against an absolute reference, rather than merely comparing two external pressure ports.
- A pressure-derived altitude display alone identifies an altimeter function; establish whether atmospheric-pressure indication is also an intended function before treating the device as a barometer.
- A weather-labelled dial qualifies through a pressure-sensitive mechanism; labels such as rain or fair do not themselves establish pressure measurement.
- A remotely displayed pressure value does not establish a local barometer; identify the physical sensor and its relationship to the display.
What robots and AI may and may not do Filled
Must not
- Break or open a mercury barometer, or handle a spill without proper cleanup.
- Issue its own severe weather warnings that could be mistaken for official alerts.
- Use uncalibrated readings for aviation altimeter settings or process safety.
Only with a human decision
- Disposing of or repairing an antique mercury barometer.
- Acting on readings for safety-critical decisions such as flight or process control.
May
- Read and log pressure from a barometer and report trends.
- Calibrate and maintain barometers it is authorized to service.
Moral aspects Filled
- Mercury instruments can poison people and the environment when broken.
- Antique barometers are valued heritage objects.
Who is affected
- Owners and collectors
- Repair workers
- Pilots relying on pressure settings
Owners Filled
Steward
The person or organization that owns it.
Links to other meta-models Filled
parent
- Q216782 - registry parent class
- Q3743695 - registry parent class
What else AI and robots need to interact with it Filled
Identity and identifiers required Filled
- Vercy registry: vr.tr.barometer
- Wikidata: Q79757 (https://www.wikidata.org/wiki/Q79757)
Direct properties required Filled
- Sensing mechanism: Liquid-column, mechanical aneroid, electronic absolute-pressure sensor, other documented mechanism, unknown
- Atmospheric pressure indication: Recorded value and displayed unit, such as Pa, hPa, kPa, mbar, mmHg or inHg
- Pressure reference basis: Local absolute pressure, sea-level-reduced pressure, other documented adjustment, unknown
- Observation time: Timestamp with time zone; acquisition interval where applicable
- Pressure range: Lower and upper pressure limits with unit and documented source
- Resolution and measurement uncertainty: Scale division or digital increment and separately documented uncertainty or accuracy specification, in pressure units
- Ambient-pressure connection: Sensing port or exposed element linked to the sampled air volume
- Installation elevation: Metres relative to a named vertical datum, with uncertainty where known
- Correction configuration: Enabled corrections, parameter values, method or firmware version, unknown
- Calibration evidence: Link to calibration or comparison record, reference instrument, date and applicable conditions
- Reading validity: Unchecked, usable under recorded conditions, suspect, invalid, unavailable
- Contained working material: Documented liquid or other relevant material; absent, unidentified or unknown
Recognition required Filled
- A dial marked in pressure units and often words such as rain, change and fair.
- Or a glass tube of liquid metal in a long wall-mounted case.
Capabilities and actions required Filled
- Read and record atmospheric pressure with its unit, time and reference basis.
- Inspect placement and the ambient-pressure path for conditions that undermine the reading.
- Compare readings with a suitable reference under compatible conditions.
- Calculate pressure change from observations with consistent reference settings.
- Apply documented configuration or calibration adjustments when authorised and supported by evidence.
- Flag unreliable readings and route damaged or unsuitable instruments for appropriate servicing.
Hazards and failure modes required Filled
- Broken mercury barometers release toxic mercury.
- Uncalibrated instruments give misleading readings.
Standards and interfaces required Filled
- Minamata Convention on Mercury, United Nations Environment Programme.
Context of use required Filled
- Barometers are used in weather stations, laboratories and buildings to measure atmospheric pressure and follow its changes.
- They also support pressure-based altitude estimates and provide ambient pressure measurements for experiments and instrument checks.
Sources Filled
- Research in progress - Initial draft only; will be replaced after lookups.
- Wikidata item Q79757: barometer - identity and sense of the item
- Wikipedia: Barometer - general description of the item
Open questions
- Does the registry intend this entry to include embedded barometric sensors and remote sensor assemblies, or only complete instruments?
- Which authoritative documentation should define reading and correction procedures for each supported mechanism?
- What measurement uncertainty and calibration evidence are sufficient for each intended use?
- How should the model distinguish factory compensation, user display offsets and sea-level reduction when an instrument exposes only a single adjustment?
- Which mechanism-specific handling and service requirements must be represented, particularly for instruments containing an identified liquid?
Machine files
Provenance
thing registry research (pass 2) · unreviewed
Built from: models/things/publications/thing-q79757/spec.json