公开(公告)号：US20170234820A1

公开(公告)日：2017-08-17

申请号：US15502861

申请日：2015-08-13

Applicant: VORBECK MATERIALS CORP.

Inventor： John S. LETTOW

IPC: G01N27/12

CPC classification number: G01N27/12 ,  G01M3/045 ,  G01M3/18 ,  G01M3/40

Abstract: In some embodiments, apparatus and methods are provided herein useful to monitor surfaces of vessels. In some embodiments, apparatus for monitoring surfaces of vessels and may include a substrate disposed proximate to the surface. By one approach, a Wheatstone bridge circuit is affixed to the substrate and comprises a sampling resistor configured to undergo a predetermined binding event. The sampling resistor comprises a conductive composition that includes fully exfoliated single sheets of graphene and is configured to undergo a conductivity change as a result of the predetermined binding event. The conductivity change corresponds to a change in an ambient environment of the surface. The sampling resistor is configured to undergo a resistivity change as a result of the predetermined binding event. The apparatus is configured to be disposed proximate to the surface.