Question 1

Can Lonetti prover tanks be used for water measurement, not just petroleum?

Accepted Answer

Yes. Lonetti manufactures prover tanks and test measures in 304 stainless steel for any liquid application — petroleum, water, chemical, food. For potable water applications, materials comply with relevant hygiene standards. The calibration certificate is issued per OIML R117, which covers liquids other than water as well as water itself.

Question 2

What test measures are used by water meter inspectors?

Accepted Answer

Municipal weights & measures inspectors typically use 5L, 10L, or 20L Lonetti stainless steel test measures for field verification of commercial and industrial water meters. Each unit carries an INTI calibration certificate traceable to OIML R120. Portable carry cases are available for inspector field kits.

Question 3

How accurate are Lonetti prover tanks for water measurement?

Accepted Answer

Lonetti prover tanks achieve ±0.05% volumetric accuracy (OIML R117 class 0.05). Each unit is individually calibrated by INTI, Argentina's national metrology institute, and carries a traceable calibration certificate. This accuracy class satisfies the reference-instrument requirements of OIML R49, ISO 4064, and most national water utility regulations.

Question 4

Are Lonetti test measures suitable for electromagnetic meter verification?

Accepted Answer

Yes. Lonetti test measures (1L–50L) and prover tanks (50L–5,000L+) are the reference standard against which electromagnetic, turbine, positive-displacement, and ultrasonic meters are all verified — regardless of meter technology. The reference vessel doesn't interact with the meter's sensing technology; it simply measures the volume that passed through.

Test Measures & Calibration Equipment for Water Utilities

What calibration equipment do water utilities need?

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