Fuel pressure gauge questions

Is the Auto Meter fuel pressure gauge with isolator (for mounting inside the car) accurate?

Are any of the electric fuel pressure gauges accurate?

I need a fuel pressure gauge but don't want to mount one on the hood.

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Is the Auto Meter fuel pressure gauge with isolator (for mounting inside the car) accurate?

Are any of the electric fuel pressure gauges accurate?

I need a fuel pressure gauge but don't want to mount one on the hood.

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They both can be acurate. The isolator style uses
glycerin on the line side of the diaphram and if
it full to the top it works great, that will give
you a 1 to 1 ratio. Thats the most common problem
with the isolator style, the line isnt full. On all
gauges they can be checked for accuracy if you have
some equipment but most of us dont have accurate stuff
at home to test with. I had to test all gauges for
accuracy before installing them on our tests at
work but we had the equipment