--- title: "Calibration: Sensors & instruments | Nexus Observatory" description: "Calibration, inside Sensors & instruments: calibration laboratories and traceability, measurement uncertainty, field calibration and intercomparison…" url: https://observatory.global/sensors/calibration/ publisher: Nexus Observatory Inc. updated: 2026-10-27 --- [Nexus Observatory](https://observatory.global/) / [Sensors & instruments](https://observatory.global/sensors/) / **Calibration** # Traceable to reference, recorded, repeated. Calibration, inside Sensors & instruments: calibration laboratories and traceability, measurement uncertainty, field calibration and intercomparison, WIGOS metadata and more. Every item is traced to its specification, from ISO/IEC 17025:2017 to CIPM MRA (BIPM), and runs on the open Observatory Protocol. [Plan with us](https://observatory.global/contact/) Architecture [The protocol](https://observatory.global/protocol/specification/) **Technologies**: 9 **At the frontier**: 0 **Protocol functions**: 3 of 8 **Industries served**: 21 Reference design, drawn to scale · drag to turn · hover a part **01** What it is ## Calibration, metadata and quality control. Instruments placed in the air, water, ground and spectrum, from weather stations to seismometers, radars and cameras, with the calibration, metadata and quality control that make their readings evidence. Each technology below carries what it is, what we do with it, and the standard it is drawn against. In situ sensors and instruments ### Calibration laboratories and traceability Calibrations tied to SI standards through accredited laboratories with stated uncertainty. We design, operate and maintain. ISO/IEC 17025:2017 · CIPM MRA (BIPM) In situ sensors and instruments ### Measurement uncertainty Uncertainty budgets that travel with every reading. We design and operate. JCGM 100:2008 (GUM) · JCGM 200:2012 (VIM) In situ sensors and instruments ### Field calibration and intercomparison Travelling standards, field checks and intercomparisons between instruments. We deploy, operate and maintain. WMO Regional Instrument Centres · WMO instrument intercomparisons In situ sensors and instruments ### WIGOS metadata Station and instrument metadata to the WMO standard so others can interpret observations. We design and operate. WMO-No. 1192 (WIGOS Metadata Standard) · WMO-No. 1160 (Manual on WIGOS, station identifiers) · OSCAR/Surface In situ sensors and instruments ### Sensor and procedure descriptions Machine-readable descriptions of sensors, processes and sampling. We design and operate. OGC SensorML 2.1 · ISO 19156:2023 · W3C/OGC SOSA/SSN In situ sensors and instruments ### Automated quality control Range, rate, flat-line, spike and neighbour tests with flags on every value. We design, integrate and operate. IOOS QARTOD manuals · WMO WIGOS Data Quality Monitoring System (WDQMS) In situ sensors and instruments ### Instrument lifecycle records Install, swap, calibration and fault history for each serial number. We deploy, operate and maintain. WMO-No. 1192 (instrument and maintenance categories) In situ sensors and instruments ### Reference gas analysers Continuous analysers for nitrogen oxides, ozone, carbon monoxide and sulphur dioxide by reference methods. We design, integrate, deploy, operate and maintain. EN 14211 (NOx) · EN 14625 (O3) · EN 14626 (CO) In situ sensors and instruments ### Particulate matter monitors Gravimetric and automated PM10 and PM2.5 measurement. We design, integrate, deploy, operate and maintain. EN 12341 (gravimetric PM) · EN 16450 (automated PM monitors) · US EPA 40 CFR Part 53 (reference and equivalent methods) **02** Architecture ## Where it sits, and what it speaks. Calibration draws on 1 domain and 8 layers of the spectrum; the highlighted layers carry this area. It speaks 3 of the protocol's 8 core functions. Meteorology (WMO No. 8 classes) 10 Air quality and atmospheric composition 7 Hydrology and water 7 Ocean and coastal 7 Seismic, geodetic, geomagnetic and radiation 8 RF, acoustics, cameras and radar 9 Calibration, metadata and quality control 7 Frontier and research 6 01**Join** Identity, attestation quote, signed policy. 02**Admit** Admitted for a stated scope, nothing wider. 03**Describe** What, where, how and by whom, with calibration. 04**Time** One clock across the grid, with its error bound. 05**Observe** Every value with quality and provenance. 06**Qualify** Tested against the specification, state on record. 07**Federate** Signed exchange across grids and trust domains. 08**Orchestrate** Software and configuration by signed plan. **03** On the grid ## Every site joins one observing grid. The open networks on the grid today, over real relief and the geodesic cells we count them into, filtered to the atmosphere domain this area serves. A site built here enrols into the same grid. **04** In the field ## Where this runs, sector by sector. 6 deployment scenarios from the sector research that rely on calibration. [Energy Bankable solar and wind measurement campaignsAccepted standards, traceable calibration and transparent data handling.](https://observatory.global/sectors/energy/) [Government and public safety National GBON surface and upper-air networkWMO-grade stations reporting through WIS 2.0, funded through the systematic-observations financing pathway.](https://observatory.global/sectors/public-safety/) [Government and public safety Wildfire camera network and fire-weather stationsCamera towers with edge inference and co-located fire-weather stations, utility- or agency-funded.](https://observatory.global/sectors/public-safety/) [Government and public safety Urban street-flood sensor networkOpen-hardware depth sensors with open data and alerts to emergency management.](https://observatory.global/sectors/public-safety/) [Government and public safety Alerting integration with the Common Alerting Protocol and cell broadcastSoftware-heavy: sensor triggers feed an alert origination tool; the alert authority keeps every decision.](https://observatory.global/sectors/public-safety/) [Cities Hybrid air-quality networkReference analysers plus calibrated low-cost nodes; low-cost sensors alone do not meet regulatory requirements.](https://observatory.global/sectors/cities/) **05** Open and enterprise ## Open by default. Enterprise by contract. The open counterpart lives on the main site for anyone to read and run. The enterprise service is designed, deployed and operated with you, under contract. Open, on the main site - Metadata and quality rules - Open networks on the grid Enterprise, on this site - Sensing as a Service - Calibration programmes - Qualification **06** The rest of the line ## Sensors & instruments, area by area. [Sensors & instruments InstrumentsAtmosphere, water, ground and sky.](https://observatory.global/sensors/instruments/) [Sensors & instruments Weather and environmentWMO siting practice, WIGOS metadata.](https://observatory.global/sensors/weather-and-environment/) [Sensors & instruments RF sensingOccupancy and interference, measured in the band.](https://observatory.global/sensors/rf-sensing/) [Sensors & instruments Sensing as a ServiceYou take the observations; we run the hardware.](https://observatory.global/sensors/sensing-as-a-service/) ## Bring us the site. Survey, design, deployment and operation for calibration. The form names who receives your details. [Talk to us](https://observatory.global/contact/) [contact@observatory.global](mailto:contact@observatory.global?subject=Sensors%20%26%20instruments%3A%20Calibration) [Nexus Observatory](https://observatory.global/)**Sensors & instruments** . Measurements that carry their own proof.[Talk to us](https://observatory.global/contact/) Sensors & instruments - [Instruments](https://observatory.global/sensors/instruments/) - [Weather and environment](https://observatory.global/sensors/weather-and-environment/) - [RF sensing](https://observatory.global/sensors/rf-sensing/) - [Calibration](https://observatory.global/sensors/calibration/) - [Sensing as a Service](https://observatory.global/sensors/sensing-as-a-service/) Technologies - [Meteorology (WMO No. 8 classes)](https://observatory.global/technologies/sensors/meteorology-wmo-no-8-classes/) - [Air quality and atmospheric composition](https://observatory.global/technologies/sensors/air-quality-and-atmospheric-composition/) Industries - [Public safety](https://observatory.global/sectors/public-safety/) - [Government](https://observatory.global/industries/) - [Cities](https://observatory.global/sectors/cities/) - [Civil resilience](https://observatory.global/industries/) - [Communities](https://observatory.global/sectors/communities/) - [Humanitarian](https://observatory.global/sectors/humanitarian/) - [Climate](https://observatory.global/industries/) Service platforms - [Observatory Protocol](https://observatory.global/protocol/) - [Protocol & Grid](https://observatory.global/grid-services/) - [Software](https://observatory.global/software/) - [Hardware & power](https://observatory.global/hardware/) - [Connectivity](https://observatory.global/connectivity/) - [Edge compute & AI](https://observatory.global/edge-ai/) - [Earth observation & GeoAI](https://observatory.global/earth-observation/) © 2026 Nexus Observatory Inc. 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