US 12,072,269 B2
Self-contained calibration apparatus for gas sensor
Jacob J. Smedsrud, Blaine, MN (US); Ryan T. Lindsey, Eden Prairie, MN (US); Greg E. Gindele, Maple Lake, MN (US); Todd L. Larson, Shakopee, MN (US); and Sean P. McLeskey, Eden Prairie, MN (US)
Assigned to Rosemount Inc., Shakopee, MN (US)
Filed by Rosemount Inc., Shakopee, MN (US)
Filed on Mar. 29, 2019, as Appl. No. 16/369,231.
Prior Publication US 2020/0309647 A1, Oct. 1, 2020
Int. Cl. G01N 1/22 (2006.01); G01N 33/00 (2006.01)
CPC G01N 1/2205 (2013.01) [G01N 33/0006 (2013.01); G01N 2001/2288 (2013.01)] 15 Claims
OG exemplary drawing
 
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.