Modular sensor assembly

1. A modular sensor assembly for performing measurement comprising:

a sensing module comprising a threaded spigot, a first slip ring conductive track, and a second slip ring conductive track,

a base module comprising a threaded receptacle, a first conductor, and a second conductor; and

wherein said sensing module is detachably mounted to said base module by rotating said threaded spigot into said threaded receptacle thereby forming a first electrical connection between said first slip ring conductive track and said first conductor, and a second electrical connection between said second slip ring conductive track and said second conductor.

2. The assembly of claim 1 , wherein said first electrical connection provides power transmission from said base module to said sensing module, and said second electrical connection provides data transmission between said base module and said sensing module.

3. The assembly of claim 2 , wherein said data transmission is provided by a first universal asynchronous receiver transmitter (UART) in said sensing module, a second UART in said base module, and a data line formed by said second electrical connection.

4. The assembly of claim 1 , wherein an electrical ground connection is formed between said threaded spigot and said threaded receptacle.

5. The assembly of claim 1 , wherein said base module further comprises a base module inside volume, and said sensing module further comprises a sensing module inside volume; and

wherein said threaded spigot further comprises a first opening and said threaded receptacle further comprises a second opening, said first opening and said second opening allowing gas or liquid to move freely between said sensing module inside volume and said base module inside volume.

6. The assembly of claim 5 , wherein said base module further comprises an isolation valve for controlling the movement of said gas or liquid through said second opening, said isolation valve in a normally closed state and configured to be pushed to an open state by said threaded spigot when said sensing module is mounted to said base module.

7. The assembly of claim 1 , wherein said first conductor is a spring loaded pin.

8. The assembly of claim 1 , wherein said first slip ring conductive track is molded into a plastic substrate.

9. The assembly of claim 1 , wherein said sensing module has a substantially cylindrical form factor.

10. The assembly of claim 1 , wherein said sensing module is selected from the group consisting of: a pressure sensor, a voltage sensor, a temperature sensor, a humidity sensor, a flow sensor, a pressure calibrating module, a voltage calibrating module, and a current calibrating module.

11. The assembly of claim 1 , wherein said sensing module further comprises an o-ring between said sensing module and said base module.

12. The assembly of claim 1 , wherein a majority portion of said sensing module is external to said base module when mounted to said base module.

13. A method of detachably mounting a sensing module to a base module to form a modular sensor assembly for performing measurement, said method comprising:

rotating a threaded spigot of said sensing module into a threaded receptacle of said base module thereby forming

a first electrical connection between a first slip ring conductive track of said sensing module and a first conductor of said base module, and

a second electrical connection between a second slip ring conductive track of said sensing module and said second conductor of said base module.