That is pretty nifty as you don't need to get a gauge into the inside of the car. By the same token I have seen a system on marine engines that monitors vacuum in the fuel line between the filter and engine that will alert you to a fuel filter getting restricted. Nice pics

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1985 Euro 240D 5 spd 140K
1979 240D 5 spd, 40K on engine rebuild
1994 Dodge/Cummins, 5 spd, 121K
1964 Allice Chalmers D15 tractor
2014 Kubota L3800 tractor
1964 VW bug

"Lifes too short to drive a boring car"