Measuring device with a plunge-in electrode

• US 20030057952A1
• Filed: 10/21/2002
• Published: 03/27/2003
• Est. Priority Date: 02/02/2000
• Status: Active Grant

• Current Assignee: Testo AG
• Original Assignee: Testo AG
• Inventors: Derr, Andreas
• Granted Patent: US 7,755,345 B2
• Time in Patent Office: Days
• US Class Current: 324/446
• CPC Class Codes: G01N 27/283 Means for supporting or introducing electrochemical probes
• CPC Class Codes: G01N 33/12 Meat; fish

Abstract

The invention relates to a measuring device, especially for measuring the pH value in food, comprising an extended first electrode (2) for plunging into a good to be measured (40) and a sheath (4) which at least partially surrounds said first electrode (2). The first electrode (2) is pivotally mounted in order to prevent breakage as a result of transversal loads exerted perpendicularly to the axial direction of said first electrode (2).

Claims

1. A measuring device having an extended first electrode (2) for insertion into a material to be measured (40) and a sheath (4) which at least partially surrounds the first electrode (2),

wherein the first electrode (2) is pivotably mounted.

2. The measuring device as recited in claim 1,

wherein the first electrode (2) is pivotably mounted on one end using a holding fixture (6, 6a, 6b, 6c).

3. The measuring device as recited in claim 1 or 2,

wherein the sheath (4) is made of a flexible material, preferably a flexible plastic.

5. The measuring device as recited in one of the preceding claims,

wherein a diameter of the sheath (4) increases in the region of the holding fixture (6).

6. The measuring device as recited in one of the preceding claims,

wherein the first electrode (2) and/or a sheath for the first electrode is made of glass.

7. The measuring device as recited in one of the preceding claims,

wherein the holding fixture (6) has an accommodating recess (8) which forms a support for an axial end (10) of the first electrode (2).

8. The measuring device as recited in claim 7,

wherein lateral support is provided by arranging, between the first electrode (2) and a side face (14) of the recess, a ring-shaped element (12A, 12B) which surrounds the first electrode (2).

9. The measuring device as recited in claim 7,

wherein the ring-shaped element (12A) has an essentially circular cross-section.

10. The measuring device as recited in claim 9,

wherein the ring-shaped element (12A) is situated in the region of the opening in the recess (8).

11. The measuring device as recited in claim 8,

wherein the ring-shaped element has a sleeve-like design, and at least partially surrounds the first electrode (2) at one end section introduced into the recess (8).

12. The measuring device as recited in one of the preceding claims,

wherein the ring-shaped element (12A, 12B) is made of a flexible material, preferably an elastomer.

13. The measuring device as recited in one of the preceding claims,

wherein the recess (8) has a truncated cone-shaped design and forms a support for the axial end (10) of the first electrode (2) at its end having the smallest diameter.

14. The measuring device as recited in one of the preceding claims,

wherein the sheath (4) closely surrounds the first electrode (2) at at least one point (22).

15. The measuring device as recited in one of the preceding claims,

wherein the sheath (4) is situated at the point (22) displaceably with respect to the first electrode (2).

16. The measuring device as recited in one of the preceding claims,

wherein the sheath (4) is detachably placed on the first electrode (2).

17. The measuring device as recited in one of the preceding claims,

wherein the holding fixture (6b) has a joint (7a, 7b).

19. The use of a measuring device as recited in one of claims 1 through 14 for measuring the pH in foodstuffs.

4. The measuring device as recited in [omission],

wherein a chamber is formed between the first electrode (2) and the sheath (4) in which a second electrode (3) for the measuring device is mounted.

18. A measuring device having an extended first electrode (2) for inserting into a material to be measured (40) and a sheath (4) which at least partially surrounds the first electrode (2),

wherein the sheath (4) is formed from a flexible material.