# US 8,570,508 B2 · Pressure-proof probe > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,570,508 B2 - Document ID: US8570508B2 - Status: Granted - Kind: B2 - Application number: 12/817,559 - Filed: 2010-06-17 - Published: 2010-12-23 - Granted: 2013-10-29 - Earliest claimed: 2010-06-17 - Assignees: Bayer MaterialScience AG - Applicants: Andreas Rose; Martin Gotter; Thomas Schwindack; Christoph Schwinning; Patrick Eckert; Holm Kändler; Christof-Krzysztof Koltunski; Hannes Ebding - Inventors: Andreas Rose; Martin Gotter; Thomas Schwindack; Christoph Schwinning; Patrick Eckert; Holm Kändler; Christof-Krzysztof Koltunski; Hannes Ebding - Web page: https://patentgrep.com/patent/US8570508B2 ## CPC - G01N 21/8507: {Probe photometers, i.e. with optical measuring part dipped into fluid sample} - G01N 21/85: Investigating moving fluids or granular solids - G01N 21/0317: {High pressure cuvettes; (G01N21/0332 - G01N21/15 take precedence)} - G01N 21/09: adapted to resist hostile environments or corrosive or abrasive materials - G01N 2021/8535: {presenting a cut} - G01N: INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES (measuring or testing apparatus or processes other than immunoassay, involving enzymes or microorganisms C12M, C12Q) ## Abstract A probe for monitoring a pressurised process space includes a casing enclosing a cavity and having a first window configured to be brought into contact with the process space, and a second window. A sealing means is configured to seal the first window to the casing. At least once coupling line is disposed within the cavity between the first and second windows and is configured to guide electromagnetic radiation entering through one of the two windows to the other of the two windows. A method for monitoring a pressurised process space, in which one or more hazardous substances occur, is also disclosed. ## Claims ### Claim 1 A probe for monitoring a pressurised process space in which one or more hazardous substances occur, the probe comprising: a casing enclosing a first cavity and having a first window, configured to be brought into contact with the pressurised process space, the first window having a first pressure-tight seal formed between the first cavity and the pressurised process space, and a second window having a second pressure-tight seal formed between the first cavity and a second cavity which is sealed off from the pressurized process space, preventing passage of the one or more hazardous substances to the second cavity, wherein the first pressure-tight seal and the second pressure-tight seal are positioned in the casing to form the cavity; a first coupling line disposed within the cavity between the first and second windows and configured to guide electromagnetic radiation entering through one of the two windows to the other of the two windows; a first lens disposed between the first coupling line and the first window; a second lens disposed between the first coupling line and the second window; a second coupling line positioned in the secondary cavity and disposed on an opposite side of the second window from the first coupling line, the second coupling line configured to guide electromagnetic radiation to or from the first coupling line; and a third lens positioned in the secondary cavity and disposed between the second coupling line and the second window, wherein the second and third lenses optically couple electromagnetic radiation between the first and second coupling lines through the second window. ### Claim 2 (depends on 1) The probe according to claim 1, wherein the first window is replaceable. ### Claim 3 (depends on 1) The probe according to claim 1, wherein the second window is fixed and integrated pressure-tightly in the casing. ### Claim 4 (depends on 1) The probe according to claim 1, wherein the casing includes connections for flushing the cavity. ### Claim 5 (depends on 1) The probe according to claim 1, further comprising one of a pressure sensor for monitoring the pressure in the cavity and a flushing gas supply and a sensor for recording a substance entering the cavity. ### Claim 6 (depends on 1) The probe according to claim 1, wherein the coupling line is configured as a waveguide. ### Claim 7 (depends on 1) The probe according to claim 1, wherein the coupling line is configured as a light guide. ### Claim 8 (depends on 7) The probe according to claim 7, wherein the probe is configured as a process window. ### Claim 9 (depends on 7) The probe according to claim 7, wherein the probe is configured as an immersible probe. ### Claim 10 A method for monitoring a process space in which one or more hazardous substances occur, the method comprising: inputting electromagnetic radiation into a first cavity within a casing, the electromagnetic radiation emerging from a first coupling line outside the first cavity, the first cavity being pressure-tightly sealed-off from the process space, preventing passage of the one or more hazardous substances into the first cavity from the process space with a pressure-tight seal formed between the first cavity and the process space, passing through a first lens outside the first cavity, through a first pressure-tight window, through a second lens disposed within the first cavity, and into a second coupling line disposed within the first cavity; and transmitting, using the second coupling line, the electromagnetic radiation through a third lens disposed within the first cavity, out of the first cavity and into the process space through a second pressure-tight window. ### Claim 11 (depends on 10) The method according to claim 10, further comprising: receiving the electromagnetic radiation into the first cavity from the process space through a third pressure-tight window lying opposite the second pressure-tight window, through a fourth lens, and into a third coupling line disposed within the first cavity; and transmitting, using the third coupling line, the received electromagnetic radiation through a fifth lens and then through the first pressure-tight window and to a spectrometer. ### Claim 12 (depends on 11) The method according to claim 11, further comprising monitoring the first cavity for indications of substances passing from the process space into the first cavity. ### Claim 13 (depends on 10) The method according to claim 10, further comprising: receiving the electromagnetic radiation into a second cavity from the process space through a third pressure-tight window lying opposite the second pressure-tight window, through a fourth lens, and into a third coupling line disposed within the second cavity; and transmitting, using the second coupling line, the received electromagnetic radiation through a fifth lens and then through a third pressure-tight window and to a spectrometer. ### Claim 14 (depends on 13) The method according to claim 13, further comprising monitoring at least one of the first cavity and the second cavity for indications of substances passing from the process space into the first cavity or the second cavity, respectively. ### Claim 15 (depends on 10) The method according to claim 10, wherein phosgene occurs as a hazardous substance within the process space. ### Claim 16 A probe for monitoring a process within a pressurised process space, the probe comprising: a casing enclosing a cavity and having a first window that is replaceable, configured to be brought into contact with the process space, and a second window is fixed and integrated pressure-tightly in the casing, both windows having a pressure tight seal with the casing to form the cavity; a first coupling line disposed within the cavity between the first and second windows and configured to guide electromagnetic radiation entering through one of the two windows to the other of the two windows; a first lens disposed between the first coupling line and the first window; a second lens disposed between the first coupling line and the second window; a second coupling line disposed on an opposite side of the second window from the first coupling line, the second coupling line configured to guide electromagnetic radiation to or from the first coupling line; and a third lens disposed between the second coupling line and the second window, wherein the second and third lenses optically couple electromagnetic radiation between the first and second coupling lines through the second window.