Definition & axiom
⚠ Conflicts with the ISO 15926-4 primary definition
Label (EN)
level transmitter
Label (PT-BR)
Definition (EN)
Definition (PT-BR)
Semi-formal axiom (Aristotelian)
Axiom type
LLM classification basis: function-based → ≡
Level transmitters are defined by their function of measuring level and transmitting the corresponding signal, regardless of the physical sensing mechanism used (capacitance, radar, ultrasonic, etc.). The numerous constructive subtypes (capacitance, radar, ultrasonic) all share the same functional identity.
Validation status
Why primitive (necessary only)
Reviewer notes
FOL theory & disjointness
First-order logic theory (generated)
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Disjoint with
▸
Expert review
— accepted
Axiomatization steps
1
Identity-Giving Function
✓ done
LevelMeasurementAndTransmissionFunction → LevelMeasurementAndTransmissionProcess ⊑ MeasurementProcess
▼
COPI-Core operation
MeasurementProcess via process parent MeasurementProcess
LLM rationale:
The identity-giving function combines level measurement with signal transmission. This is what distinguishes a level transmitter from other transmitters (pressure, temperature, flow) and from level instruments that don't transmit signals.
▸
Expert review
— accepted
2
Genus Proximus
✓ done
Transmitter · MaterialArtifact
▼
Genus (genus proximum)
Most specific superclass — may be a domain class like "Valve" or an IOF-Core root.
BFO/IOF-Core Root
bfo:Object branch
bfo:ObjectAggregate branch
bfo:ImmaterialEntity branch
LLM rationale:
From parent candidates, 'transmitter' is the most specific and appropriate genus. ISO 15926 defines level transmitter as a subtype of PROCESS VARIABLE TRANSMITTER, and transmitter is already enriched in our ontology with SignalTransmissionFunction. Level transmitter adds the specific level measurement capability to the general transmission function.
▸
Expert review
— accepted
3
Differentia Specifica
✓ done
∃bearerOf.LevelMeasurementFunction
▼
Conditions that distinguish
Level Transmitter
from sibling classes under genus
Transmitter.
Only what is not already entailed by the genus.
Differentia expression
Differentia (natural language)
LLM rationale:
The differentia is the level measurement function. The genus already provides signal transmission capability, so the differentia only needs to specify what process variable is being measured - level in this case.
▸
Expert review
— accepted
4
Necessary Parts
✓ done
no necessary parts
▼
Consider part-whole relations beyond subsumption:
hasComponentPartAtAllTimes (universal, structurally essential)
· hasComponentPartAtSomeTime (contingent, optional component)
LLM rationale:
Level transmitters universally require a sensing element for level detection and signal conditioning electronics to produce the standardized output signal. The specific sensor technology varies by subtype.
▸
Expert review
— accepted
5
Process Participation Signature ⟨I, O, T⟩
✓ done
LevelMeasurementResult → InformationContentEntity
▼
Inputs (I)
Outputs (O)
Transformation (T)
LLM rationale:
Level transmitters receive level information from the process and electrical power, converting level data to standardized electrical output signals (typically 4-20mA)
▸
Expert review
More
Alternative labels
none
▼
Synonyms / alternative labels (comma-separated) — skos:altLabel
Language auto-detected on export (PT if the label contains accents, EN otherwise).
Properties as BFO qualities
0 of 5 selected
▼
Select which CFIHOS/DEXPI properties inhere in every instance of Level Transmitter as
bfo:Quality subclasses.
Each selected property →
:LevelTransmitterQuality ⊑ bfo:Quality, inheres in :LevelTransmitter
Custom axioms
none
▼
Axioms not produced by the pipeline. Each is appended verbatim as an
rdfs:subClassOf restriction on Level Transmitter.
Write the restriction block in Turtle syntax (without the leading
rdfs:subClassOf).
Example: [ owl:onProperty :hasPart ; owl:someValuesFrom :Wellhead ]
Cross-standard divergences
none detected yet
▼
Click "Detect divergences" to analyse cross-standard disagreements for this cluster.
Source Definitions (4)
LEVEL TRANSMITTER — ClassOfFunctionalObject
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cfihos V2.0
level transmitter — TagAndEquipmentClass
Definition text hidden (copyrighted standard) — sign in to view, or follow the source link above.
Level Transmitter — ISA Tag Abbreviation
Definition text hidden (copyrighted standard) — sign in to view, or follow the source link above.
Level Transmitter — Class
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Provenance tiers (4)
Sources the pipeline cited while building this entry. Verbatim = the quote was copied word-for-word from that source; summary = paraphrased.
Linked competency questions
- answered What planned processes involve Transmitters as measurement participants?
- answered What distinguishes a level sight glass from a level transmitter?
OWL/Turtle preview
Download .ttl
Numeric
COPI_* IRIs from copi-iri-map.tsv, with the readable name as a trailing comment. Names not yet in the map stay readable.
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ID 67 · claude-sonnet-4-20250514
Created 2026-04-13 23:41
Updated 2026-09-08 12:26
