Gauge Comparison Demo 0-100-0 Psi

For any one just looking at going digital and seeing this
So you know and don’t know good or bad this stuff is similar vintage and the newer generation testo 523 is field “zeroed” and has different pressure sensors than this 1st generation 523. My high side will vary in pressure when compared to the low side depending on current temperature and atmospheric pressure and it gets more technical.

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