Here you can see the sensor setup. If you look closely at about 11:00 on the sensor face, you can see the small blue potentiometer that is used for calibrating the sensor. It, along with the leads are embedded in black silicone sealant. The wires run up through the counterlung and the BC inflator, where they connect to the display. The sensor is a SeaTronics, with 27mV output.

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