Traitement en cours

Veuillez attendre...

Paramétrages

Paramétrages

Aller à Demande

1. WO1997041429 - DISPOSITIF SERVANT A DETECTER LA CONDUCTIVITE ET LE pH D'UN ECOULEMENT DE LIQUIDE

Note: Texte fondé sur des processus automatiques de reconnaissance optique de caractères. Seule la version PDF a une valeur juridique

[ EN ]

What is claimed is:
1. A sensor for measuring at least one of pH and conductivity for liquids comprising:
a housing comprising a pH cell;
a pH cell fluid inlet disposed within said pH cell;
a pH cell fluid outlet disposed within said pH cell, said pH cell fluid inlet and said pH cell fluid outlet defining a pH fluid flow path therebetween;
an aperture within said pH cell adapted to receive an electronic pH probe therein, said
aperture being configured to position an end of said electronic pH probe having a pH sensing
area therein in juxtaposition to said pH fluid flow path, wherein fluid flowing within said
fluid flow path is exposed to the pH sensing
area of said electronic pH sensor.
2. The sensor of claim 1 further comprising a conductivity cell, said conductivity cell being adapted for placement of a conductivity sensor therein, said conductivity sensor being disposed between a conductivity cell fluid inlet and a
conductivity cell fluid outlet wherein fluid flowing from said conductivity cell fluid inlet through said conductivity cell fluid outlet contacts said
conductivity sensor therebetween.
3. The sensor of claim 2 wherein said pH cell fluid outlet is adapted for placement in fluid flow relationship to said conductivity cell fluid flow inlet wherein fluid flowing from said pH cell fluid outlet will then flow into said conductivity cell fluid inlet.
4. The sensor of claim 3 further comprising means for retaining said electronic pH probe within said aperture of said pH cell.
5. The sensor of claim 3 wherein said retaining means comprises a threaded area adapted for receiving a retaining nut therein, said retaining nut having an aperture for retaining said electronic pH probe therethrough .
6. The sensor of claim 4 further comprising means for sealing fluid within said pH cell.
7. The sensor of claim 6 wherein said sealing means comprises an 0-ring disposed on a lip of said pH-probe, said 0-ring contacting a ridge within said pH fluid cell to form a liquid tight seal when said pH probe is inserted into said aperture.
8. The sensor of claim 6 wherein said pH fluid flow path is further defined by said end of said electronic pH probe having a pH sensing area inserted into said receptacle.
9. The sensor of claim 8 wherein a first portion of said flow path starting from said pH cell fluid inlet and ending at said pH sensing area of said pH sensing probe progressively expands in width to a point .
10. The sensor of claim 9 wherein a second portion of said flow path starting from said pH sensing area of said pH sensing probe and ending at said pH cell fluid outlet progressively decreases in width from said point .
11. The sensor of claim 10 wherein the widest cross sectional area of said flow path adjacent said sensing area is between one and two times the cross sectional area of said pH cell fluid inlet.
12. The sensor of claim 11 wherein a portion of said end wall defining said flow path is oriented at an angle .
13. The sensor of claim 12 wherein said angle is approximately twelve degrees.
14. The sensor of claim 12 wherein a second portion of said end wall defining said flow path is oriented at a second angle.
15. The sensor of claim 14 wherein the second angle is the negative of the first angle.
16. The sensor of claim 2 or 14 wherein said conductivity sensor comprises a first positive electrode and a second negative electrode, said electrodes being separated by a gap therebetween.
17. The sensor of claim 16 wherein said
conductivity sensor is further disposed to allow liquid flowing within said conductivity cell through said conductivity cell fluid inlet to flow into said gap between said electrodes .
18. The sensor of claim 17 wherein said
electrodes each comprise an aperture extending therethrough, said aperture being disposed to allow said liquid flowing within said conductivity cell to flow therethrough and into said gap.
19. The sensor of claim 18 wherein said
electrodes are disposed so that said apertures of each electrode are coaxially aligned.
20. The sensor of claim 19 wherein said
apertures are coaxially aligned with said
conductivity cell fluid inlet and said conductivity cell fluid outlet.
21. The sensor of claim 20 further comprising means for supporting said electrodes within said conductivity cell.
22. The sensor of claim 21 when said supporting means comprises a first receptacle in juxtaposition to a second receptacle, said receptacle being further oriented to maintain coaxial alignment between the apertures of said electrodes and to maintain said gap between said electrode.
23. The sensor of claim 22 wherein said
electrodes are cylindrically shaped and wherein said apertures extend through the center of said
cylindrically shaped electrodes.
24. The sensor of claim 23 further comprising means for sealing said conductivity sensor.
25. The sensor of claim 24 wherein said sealing means comprises a pair of O-rings, each of said pair of O-rings being disposed about said electrodes to prevent fluid from flowing outside of said apertures.

26. The sensor of claim 25 wherein each
electrode comprises a means for connecting an
electrical conductor thereto.
27. The sensor of claim 26 wherein said O-rings contact a top surface of said conductivity cell and bottom surface of said conductivity cell,
respectively.
28. The sensor of claim 27 further comprising a cap adapted to cover an opening to said conductivity cell.
29. The sensor of claim 28 wherein at least a portion of said conductivity cell is filled with a potting material.
30. The sensor of claim 29 further comprising means for securing said sensor.
31. The sensor of claim 30 further comprising a compression fitting in fluid flow relationship to said pH cell fluid inlet.
32. The sensor of claim 31 further comprising a compression fitting in fluid flow relationship to said conductivity cell fluid outlet .
33. A method of measuring at least one of pH and conductivity comprising:
flowing a fluid in a stream into pH cell fluid inlet;
passing said fluid past an electronic pH probe thereby electronically measuring the pH of said liquid;
widening the stream of fluid as it passes a pH sensing area of said electronic pH probe so that said stream covers said sensing area;
sensing the pH of said fluid within said stream covering said sensing area.
34. The method of claim 33 further comprising making the stream of fluid more shallow as it passes the pH sensing area.
35. The method of claim 34 wherein the widest cross sectional area of the fluid passing before sensing area is between one and two times the cross sectional area of the fluid passing into the pH cell fluid inlet .
36. The method of claim 33 or 35 further comprising flowing said fluid into a conductivity cell wherein the conductivity of said fluid is measured.
37. The method of claim 36 wherein said fluid is flowed in a stream into a gap located between electrodes of a conductivity sensor in said
conductivity cell.
38. The method of claim 37 wherein said fluid is flowed into an aperture extending through said electrodes .
39. A sensor for measuring pH and conductivity for liquids comprising:
a housing comprising a pH cell and a
conductivity cell;
a pH cell fluid inlet disposed within said pH cell;
a pH cell fluid outlet disposed within said pH cell, said pH cell fluid inlet and said pH cell fluid outlet defining a pH fluid flow path therebetween;
an aperture within said pH cell adapted to receive an electronic pH probe therein, said
aperture being configured to position an end of said electronic pH probe having a pH sensing
area therein in juxtaposition to said pH fluid flow path, wherein fluid flowing within said
fluid flow path is exposed to the pH sensing
area of said electronic pH sensor.
40. The sensor of claim 39 wherein said
conductivity cell being adapted for placement of a conductivity sensor therein, said conductivity sensor being disposed between a conductivity cell fluid inlet and a conductivity cell fluid outlet wherein fluid flowing from said conductivity cell fluid inlet through said conductivity cell fluid outlet contacts said conductivity sensor therebetween.
41. The sensor of claim 40 wherein said pH cell fluid outlet is in fluid flow relationship to said conductivity cell fluid inlet wherein fluid flowing from said pH cell fluid outlet will then flow into said conductivity cell fluid inlet.
42. The sensor of claim 41 wherein said housing comprises a threaded area adapted for receiving a retaining nut therein, said retaining nut having an aperture for retaining said electronic pH probe therethrough.
43. The sensor of claim 42 further comprising an O-ring disposed on a lip of said pH-probe, said O-ring contacting a ridge within said pH fluid cell to form a liquid tight seal when said pH probe is inserted into said aperture.
44. The sensor of claim 43 wherein said pH fluid flow path is further defined by said end of said electronic pH probe having a pH sensing area inserted into said receptacle.
45. The sensor of claim 44 wherein a first portion of said flow path starting from said pH cell fluid inlet and ending a point juxtaposed to said pH sensing area of said pH sensing probe progressively expands in width.
46. The sensor of claim 45 wherein a second portion of said flow path starting from a point juxtaposed to said pH sensing area of said pH sensing probe and ending at said pH cell fluid outlet
progressively decreases in width.
47. The sensor of claim 46 wherein the widest cross sectional area of said flow path adjacent said sensing area is between one and two times the area of said pH cell fluid inlet.
48. The sensor of claim 47 wherein a portion of said end wall defining said flow path is oriented at an angle .
49. The sensor of claim 48 wherein said angle is approximately twelve degrees.
50. The sensor of claim 49 wherein a second portion of said end wall defining said flow path is oriented at a second angle .
51. The sensor of claim 50 wherein the second angle is the negative of the first angle.
52. The sensor of claim 51 wherein said
conductivity sensor comprises a positive electrode and a negative electrode, said electrodes being separated by a gap therebetween.
53. A conductivity sensor comprising:
a positive electrode;
a negative electrode, said negative and
positive electrodes being separate by a gap;

said sensor being adapted for placement
between a fluid inlet and outlet of a
conductivity cell wherein fluid entering said inlet flows into said gap.
54. The conductivity sensor of claim 53 wherein said electrodes comprise a cylinder, said cylinder having an aperture extending therethrough, said aperture being disposed to allow said liquid flowing within said conductivity cell to flow therethrough and into said gap.
55. The conductivity sensor of claim 54 wherein said electrodes are disposed so that said apertures of each electrode are coaxially aligned.
56. The conductivity sensor of claim 55 wherein said apertures are coaxially aligned with said conductivity cell fluid inlet and said conductivity cell fluid outlet.
57. The conductivity sensor of claim 56 further comprising means for supporting said electrodes within said conductivity cell.
58. The conductivity sensor of claim 57 when said supporting means comprises a first receptacle in juxtaposition to a second receptacle, said
receptacles being further oriented to maintain coaxial alignment between the apertures of said electrodes and to maintain said gap between said electrode .
59. The conductivity sensor of claim 58 wherein said apertures extend through the center of said cylindrically shaped electrodes.
60. The conductivity sensor of claim 59 further comprising means for sealing said conductivity sensor .
61. The conductivity sensor of claim 60 wherein said sealing means comprises a pair of O-rings, each of said pair of O-rings being disposed about said electrodes to prevent fluid from flowing outside of said apertures.
62. The conductivity sensor of claim 61 wherein each electrode comprises a means for connecting an electrical conductor thereto.
63. The conductivity sensor of claim 62 wherein said O-rings contact a top surface of said
conductivity cell and bottom surface of said
conductivity cell, respectively.
64. The conductivity sensor of claim 63 further comprising a cap adapted to cover an opening to said conductivity cell.
65. The conductivity sensor of claim 64 wherein at least a portion of said conductivity cell is filled with a potting material.