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Figure 1 Idealized Automatic Piston Prover
In order to make an intrinsically volumetric device useful for measurement of gases, it is generally necessary to adjust the readings to a
standardized temperature and pressure, yielding mass flow. For this reason, we include temperature and pressure transducers to allow
computation of standard (mass) flow by the internal computer (Figure 2).
Bypass Valve
Vent
Temperature
Transducer
Inventory Volume
Inlet Filter
Inlet
Cylinder
Piston
Absolute
Transducer
Light
Emitter
Photodiode
/ Collimator
Figure 2 Practical Piston Prover
Bypass Valve
Vent
Inventory Volume
Inlet Filter
Inlet
Cylinder
Piston
Light
Emitter
Photodiode
/ Collimator