Removable sensor port insert apparatus

1. An apparatus configured for insertion into a sensor port of a flow cell, the apparatus comprising: an insert body comprising a first end, a second end axially opposite of the first end, and a surface defining a cavity having an opening at the first end of the insert body and a base at the second end of the insert body; a sensor located in the cavity and comprising a first portion proximate to the base of the cavity, wherein the first portion of the sensor has a first outer diameter; a first insert body holding nut comprising a first side, a second side opposite of the first side, a center opening having an inner diameter greater than the first outer diameter of the first portion of the sensor, and threads encircling the first insert body holding nut between the first side and the second side for engaging with a threaded portion of the interior surface of the sensor port, wherein the second side of the first insert body holding nut is proximate to and applies a compressive force against the first end of the insert body in a first axial direction; and a sensor holding nut comprising: a nut portion comprising a first side, a second side opposite of the first side, and threads encircling the nut portion between the first side and the second side for engaging with the threaded portion of the interior surface of the sensor port, and a cylinder portion comprising a center opening having an inner diameter less than the first outer diameter of the first portion of the sensor, wherein the cylinder portion extends from the second side of the nut portion through the center opening of the first insert body holding nut into the cavity, wherein the distal end of the cylinder portion is proximate to and applies a compressive force against the first portion of the sensor in the first axial direction.

2. The apparatus of claim 1 , further comprising:

a second insert body holding nut comprising a first side, a second side opposite of the first side, a center opening having an inner diameter greater than the first outer diameter of the first portion of the sensor, and threads for engaging with the threaded portion of the interior surface of the sensor port, wherein the second side of the second insert body holding nut is proximate to and applies a compressive force against the first side of the first insert body holding nut.

3. The apparatus of claim 1 , wherein the sensor further comprises a second portion proximate to the opening of the cavity, wherein the second portion of the sensor has a second outer diameter that is less than the first outer diameter of the first portion of the sensor.

4. The apparatus of claim 3 , wherein the inner diameter of the center opening of the cylinder portion of the sensor holding nut is greater than the second outer diameter of the second portion of the sensor.

5. The apparatus of claim 4 , wherein the second portion of the sensor extends through the cylinder portion of the sensor holding nut.

6. The apparatus of claim 1 , wherein the sensor is a transducer.

7. The apparatus of claim 6 , wherein the first portion of the sensor comprises a piezoelectric crystal.

8. The apparatus of claim 1 , wherein the first insert body holding nut is a jamb nut.

9. The apparatus of claim 1 , further comprising an o-ring installed between the distal end of the cylinder portion and the first portion of the sensor.

10. The apparatus of claim 1 , wherein the first outer diameter of the first portion of the sensor is the maximum outer diameter of the sensor.

11. The apparatus of claim 1 , wherein the first insert body holding nut comprises a first key way pattern on the first side of the first insert body holding nut.

12. The apparatus of claim 11 , wherein the first key way pattern comprises a plurality of key way grooves.

13. The apparatus of claim 1 , wherein the sensor holding nut comprises a second key way pattern on the first side of the sensor holding unit.

14. The apparatus of claim 13 , wherein the second key way pattern comprises a plurality of key way grooves.

15. The apparatus of claim 14 , wherein the first key way pattern is different than the second key way pattern.

16. An apparatus configured for insertion into a sensor port of a flow cell, the apparatus comprising: an insert body comprising a first end, a second end axially opposite of the first end, and a surface defining a cavity; a sensor located in the cavity; a first insert body holding nut comprising a first side, a second side opposite of the first side, a first key way pattern on the first side, and threads encircling the first insert body holding nut between the first side and the second side for engaging with a threaded portion of the interior surface of the sensor port, wherein the second side of the first insert body holding nut is proximate to and applies a compressive force against the first end of the insert body in a first axial direction; and a sensor holding nut comprising a first side, a second side opposite of the first side, a second key way pattern on the first side, and threads encircling the sensor holding nut between the first side and the second side for engaging with the threaded portion of the interior surface of the sensor port, wherein the sensor holding nut applies a compressive force against the first portion of the sensor in the first axial direction, wherein the first key way pattern is different than the second key way pattern.

17. The apparatus of claim 16 , wherein the first key way pattern comprises a plurality of key way grooves.

18. An apparatus configured for insertion into a sensor port of a flow cell, the apparatus comprising: an insert body comprising a first end, a second end axially opposite of the first end, and a surface defining a cavity having an opening at the first end of the insert body and a base at the second end of the insert body; a sensor located in the cavity and comprising a first portion proximate to the base of the cavity, wherein the first portion of the sensor has a first outer diameter; a first insert body holding nut comprising a first side, a second side opposite of the first side, a center opening having an inner diameter greater than the first outer diameter of the first portion of the sensor, and threads encircling the first insert body holding nut between the first side and the second side for engaging with a threaded portion of the interior surface of the sensor port, wherein the second side of the first insert body holding nut is proximate to and applies a compressive force against the first end of the insert body in a first axial direction; a second insert body holding nut comprising a first side, a second side opposite of the first side, a center opening having an inner diameter greater than the first outer diameter of the first portion of the sensor, and threads encircling the second insert body holding nut between the first side and the second side for engaging with the threaded portion of the interior surface of the sensor port, wherein the second side of the second insert body holding nut is proximate to and applies a compressive force against the first side of the first insert body holding nut in the first axial direction; and a sensor holding nut comprising: a nut portion comprising a first side, a second side opposite of the first side, and threads encircling the nut portion between the first side and the second side for engaging with the threaded portion of the interior surface of the sensor port, and a cylinder portion comprising a center opening having an inner diameter less than the first outer diameter of the first portion of the sensor, wherein the cylinder portion extends from the second side of the nut portion through the center openings of the first insert body holding nut and the second insert body holding nut into the cavity, wherein the distal end of the cylinder portion is proximate to and applies a compressive force against the first portion of the sensor in the first axial direction.

19. The apparatus of claim 18 , wherein first insert body holding nut and the second insert body holding nut comprises: a first key way pattern on the first sides of the first insert body holding nut and the second insert body holding nut and the sensor holding nut comprises a second key way pattern on the first face of the sensor holding unit.

20. The apparatus of claim 19 , wherein the first key way pattern is different than the second key way pattern.