Self-contained calibration apparatus for gas sensor

Patent metadata

Field	Value
Publication number	US-12072269-B2
Application number	US-201916369231-A
Country	US
Kind code	B2
Filing date	Mar 29, 2019
Priority date	Mar 29, 2019
Publication date	Aug 27, 2024
Grant date	Aug 27, 2024

Abstract

A detachable filter assembly includes a filter, a filter assembly housing defining a body of the filter assembly, an attachment mechanism configured to couple to a sensor installation, a securing mechanism configured to mate with a mating feature on the sensor installation, and a calibration port configured to provide a direct fluid pathway to the sensor installation.

First claim

What is claimed is:

1. A detachable filter assembly comprising:
a filter;
a filter assembly housing defining a body of the filter assembly;
an attachment mechanism configured to couple to a sensor installation;
a securing mechanism configured to mate with a mating feature on the sensor installation;
a calibration port built into the filter assembly, the calibration port having a cylindrical shape and an outer diameter configured to receive a calibration hose and configured to provide a direct fluid pathway to the sensor installation;
a plurality of port attachments molded as a continuous piece with the calibration port and the filter assembly, each port attachment being coupled to the calibration port and extending radially to the filter assembly;
a calibration hose having a first end coupled to the calibration port; and
a calibration fitting coupled to a second end of the calibration hose, the calibration fitting being mounted relative to the detachable filter assembly, wherein the calibration fitting is mounted to the attachment mechanism.

2. The detachable filter assembly of claim 1 , wherein the fluid pathway is substantially enclosed.

3. The detachable filter assembly of claim 1 , wherein the body comprises open sensor detection areas configured to provide fluid access to a sensing element.

4. The detachable filter assembly of claim 1 , wherein the sensor module includes a guide that positions the sensor module into a correct installation configuration.

5. The detachable filter assembly of claim 1 , wherein the calibration port comprises coupling mechanisms configured to secure a calibration hose to the calibration port.

6. The detachable filter assembly of claim 1 , wherein the calibration port is at an offset angle relative to the sensor installation.

7. The detachable filter assembly of claim 1 , wherein the plurality of port attachments are equally spaced radially from one another.

8. The detachable filter assembly of claim 7 , wherein the plurality of port attachments comprise at least four port attachments.

9. The detachable filter assembly of claim 1 , and further comprising a processor configured to compare a sensor-related output to a pre-set threshold for calibration.

10. The detachable filter assembly of claim 1 , and further comprising a processor configured to compare a sensor-related output to a pre-set threshold for determining accuracy.

11. The detachable filter assembly of claim 1 , and further comprising a processor configured to compare a sensor-related output to a pre-set threshold for determining whether an adjustment to process flow is required.

12. The detachable filter assembly of claim 1 , wherein a calibration fluid is selectably caused to flow through the calibration hose by opening a gas cylinder coupled to the calibration hose.

13. The detachable filter assembly of claim 1 , wherein a calibration fluid is selectably caused to flow through the calibration hose by an automated control system.

14. The detachable filter assembly of claim 13 , wherein the calibration fluid is selectably caused to flow through the calibration hose automatically.

15. The detachable filter assembly of claim 1 , wherein the attachment mechanism is a clamp.

Assignees

• Rosemount Inc

Inventors

• Smedsrud Jacob J
• Lindsey Ryan T
• Gindele Greg E
• Larson Todd L
• Mcleskey Sean P

Classifications

• G01N33/0006 Primary

  Calibrating gas analysers · CPC title

• G01N2001/2288

  Filter arrangements · CPC title

• G01N1/2273

  Atmospheric sampling · CPC title

• G01N33/0009

  General constructional details of gas analysers, e.g. portable test equipment (devices for withdrawing samples in the gaseous state G01N1/22) · CPC title

• G01N33/0036

  specially adapted to detect a particular component (physical analysis of gaseous biological material G01N33/497) · CPC title