Process monitoring device

A method comprising

• positioning a medical device within a sterilizing device, wherein, when a disinfectant flows through the sterilizing device, an outflow of the disinfectant is produced;
• positioning an article within a portion of the outflow;
• the article, comprising:
• a first substrate having a first major surface and opposite ends, wherein the opposite ends comprise a first end and a second end;
• and
• a process indicator disposed on at least a portion of the first major surface as a coating or film, wherein the process indicator is configured to react with at least one liquid disinfectant selected from the group consisting of glutaraldehyde, ortho-phthalaldehyde, hydrogen peroxide, peroxyacetic acid, and combinations thereof;
• wherein a flow channel is formed by a portion of the process indicator and extends between the opposite ends,
• wherein the flow channel defines a fluid pathway of a disinfectant from the first end through the second end;
• and
• contacting a portion of the outflow with the process indicator of the article;
• wherein positioning the article further comprises positioning the article such that a standoff distance between the outflow of the medical device and the flow channel is no greater than 3 inches.