Might be an over generalization.
The Q&A only made it clear that pressure transducers were not permitted on the high pressure side.
They aren't illegal on the low pressure side, as long as they adhere to all other pneumatic rules, e.g., 125psi rating, etc.
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Originally Posted by Q&A Q428
Q.Are pressure transducers (analog pressure sensors) legal for use on the high pressure side of the pneumatic system, in addition to the standard pressure switch used to control the compressor? Assuming that all specification (maximum pressure, etc) are met.
A.No. Please see [R82].
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Originally Posted by R82
Only the compressor, relief valve (P/N: 16-004-011), pressure switch, pressure vent plug valve, pressure gauge, storage tanks, tubing, and connecting fittings may be in the high-pressure pneumatic circuit upstream from the regulator.
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