Self-calibrating fluid measuring device

A self-calibrating fluid measuring device for calculating density and velocity of a fluid comprising:

• a. a hollow body for receiving and emitting the fluid, the hollow body comprising:
• an exterior surface, an interior surface, and a chamber;
• b. a ledge formed from the interior surface of the hollow body;
• c. a conical section mount, wherein the conical section mount is concentrically disposed within the hollow body and secured to the ledge, and further wherein the conical section mount comprises a mounting surface to create a flush mount with the ledge;
• d. an upstream static pressure sensor mounted in a static upstream pressure port, the upstream static pressure sensor extending into the chamber;
• e. a cone downstream pressure sensor mounted in a downstream pressure port, the downstream pressure port extending into the conical section mount downstream from the static upstream pressure port;
• f. a temperature sensor extending into a temperature port, wherein both the temperature sensor and the temperature port extend into the conical section mount;
• g. a ram velocity sensor mounted in a ram velocity port, the ram velocity port extending into the chamber proximate an upstream end of the hollow body;
• h. a ram inlet bore fluidly engaging the ram velocity port to receive pressure generated by the fluid impacting the ram inlet bore;
• i. a detachable and re-attachable conical area ratio changer connected the conical section mount, wherein the detachable and re-attachable conical area ratio changer comprises a central bore fluidly communicating with the downstream pressure port;
• j. a bore in the conical section mount;
• and
• k. a hollow fastener with a hollow fastener bore fluidly connected to the bore, wherein the hollow fastener aligns and centers the detachable and re-attachable conical area ratio changer to the conical section mount.