It is not a measurable 0-5V wideband sensor like the aftermarket ones you probably refer to (in fact the aftermarket sensors aren't 0-5V either, that's just an analog output from the amplifier). The amplifier for the sensor is inside the ECU. The ECU measures current and therefore you can't get a 0-5V analog voltage out of the wires or anything (ie. can't connect an aftermarket AFR gauge).
RSX Type-S (USDM) and JDM EP3 CTR both have the same exact sensor.
RSX Type-S (USDM) and JDM EP3 CTR both have the same exact sensor.