National institutes require instruments traceable to the international system.
National metrology institutes (NMIs) and legal metrology authorities are the apex of the traceability chain — their reference standards must be traceable to the SI system and to OIML recommendations, and must serve as the reference for all downstream calibration in the country.
Lonetti has a long history of supplying prover tanks, test measures, and water draw systems to NMIs and legal metrology authorities — including INTI (Argentina), INMETRO (Brazil), and equivalent agencies across Latin America, the Middle East, and Africa. Our equipment is designed and manufactured to the OIML recommendations that govern national reference standards.
For government procurement, Lonetti provides full documentation: material certificates, dimensional inspection reports, INTI calibration certificates, and the technical file required for import and homologation.
What operators in this industry need to solve.
SI-traceable accuracy
Reference standards must be traceable to BIPM, OIML, and the SI system. Lonetti calibration certificates establish this chain from INTI to the instrument.
OIML R117 / R120 compliance
National reference standards for liquid measurement must comply with OIML R117 (dynamic systems) and R120 (test measures) — Lonetti's standard build.
Field inspection equipment
Weights & measures inspectors require portable, certified test measures for retail fuel, water, and chemical meter inspection across their territory.
International audit support
OIML mutual recognition and peer-review audits require documentation of reference standards and full calibration records.
Equipment specified in this vertical.
Custom Stainless Steel Prover Tanks
Volumetric reference vessels from 50L to 5,000L+, built in 304 SS to OIML R117 and API MPMS Ch.
Precision Test Measures & Calibration Cans
Handheld volumetric reference cans from 1L to 50L — for verifying fuel dispensers, retail pumps, and small meters in the field.
Waterdraw Pipe Prover Calibration Systems
Complete water draw systems for pipe prover base-volume determination — including reference vessels, pump skid, valving, and instrumentation.
Custom Liquid Calibration Test Benches
Fixed and mobile test benches for meter verification — flow loop, reference standard, control panel, and instrumentation engineered around your meter portfolio.
MINILAB® — Self-Contained Mobile Calibration Laboratories
A complete calibration laboratory built into a van.
The regulations Lonetti equipment is built to satisfy.
Specific use cases in this industry.
National reference standards
Primary and secondary reference prover tanks for national metrology institutes, calibrated directly to BIPM/OIML recommendations.
Inspector field kits
Portable test measure sets (1L–50L) for weights & measures inspectors conducting retail fuel and water meter checks.
Regional calibration centers
Complete test bench installations for regional metrology laboratories serving multiple provinces or states.
Training and education
Reference equipment for metrology training academies and university measurement programs.
Pipe prover verification
Water draw systems for NMIs verifying pipe provers at petroleum terminals under their jurisdiction.
MINILAB® inspector vehicles
Mobile calibration laboratories for national inspection bodies serving remote areas and distributed meter populations.
Common questions.
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