# F1 Fuel Meter Supplier Sues Replacement

> Sentronics sues Allengra over US patent infringement ahead of Austin GP.
- Title: F1 Fuel Meter Supplier Sues Replacement · Motorsport
- Summary: Sentronics sues Allengra over US patent infringement ahead of Austin GP. Sentronics Holdings Ltd claims Allengra's fuel flow meters infringe its US patent…
- Keywords: sentronics, allengra, fia, fuel flow meter, us grand prix, patent infringement, formula 1, sports, cars, Fuel, Meter, Supplier
- Source: Motorsport — https://motorsport.com/f1/news/f1s-former-fuel-flow-meter-supplier-sues-its-replacement-in-texas/10866487
- Author: Alex Harrington
- Published: 2026-10-20T11:35:28+00:00
- Read time: 1 min
- Topics: sentronics, allengra, fia, f1, fuel flow meter, us grand prix, patent infringement, formula 1, sports, cars
## Sentronics sues Allengra
Sentronics Holdings Ltd, FIA's fuel flow meter supplier until 2025, sued Allengra GmbH in Texas court.
## Patent infringement claim
Sentronics claims Allengra's sensors infringe its US patent 11,391,609 granted in July 2022.
## Patent details
Patent measures fuel flow rate using ultrasonic signals traveling with and against flow.
## Infringement evidence
Sentronics' lab tests in late 2024 confirmed infringement and shared technical details under NDA.
## US Grand Prix unaffected
Race weekend not affected as Sentronics hasn't requested emergency ban for parts.
## Key takeaway

Sentronics Holdings Ltd claims Allengra's fuel flow meters infringe its US patent 11,391,609, seeking permanent ban and tripled damages.