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View of the heat exchanger LOX supply line.

Picture 4 of 4.

Inserted into the LOX supply line is a LOX flowmeter, flight instrumentation which measures the flow of LOX to the heat exchanger. It is visible here, between and behind the two top heat exchanger lines. One of two orange electrical connectors are visible here, perpendicular to the flowmeter.

The stamp on the flowmeter reads

Transducer - Lox
Range
20 to 100 GPM
Max. Freq.
450 CPS
2500 PSI Max.