CN220983184U - PH pen test probe - Google Patents
PH pen test probe Download PDFInfo
- Publication number
- CN220983184U CN220983184U CN202322271253.XU CN202322271253U CN220983184U CN 220983184 U CN220983184 U CN 220983184U CN 202322271253 U CN202322271253 U CN 202322271253U CN 220983184 U CN220983184 U CN 220983184U
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- China
- Prior art keywords
- reference electrode
- plastic shell
- shell main
- main body
- probe
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- 239000000523 sample Substances 0.000 title claims abstract description 56
- 238000012360 testing method Methods 0.000 title claims abstract description 23
- 239000011521 glass Substances 0.000 claims abstract description 43
- 239000007788 liquid Substances 0.000 claims abstract description 5
- 230000000149 penetrating effect Effects 0.000 claims abstract description 5
- 238000005259 measurement Methods 0.000 abstract description 6
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 4
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- 238000009529 body temperature measurement Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 235000011837 pasties Nutrition 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Landscapes
- Measuring Temperature Or Quantity Of Heat (AREA)
Abstract
The utility model relates to a PH pen test probe, which comprises a plastic shell main body and a glass probe arranged in the plastic shell main body and penetrating out of a bottom through hole of the plastic shell main body, wherein a temperature sensor and a positive reference electrode are arranged in the glass probe, a reference liquid is filled in a space between the outer wall of the glass probe and the inner wall of the plastic shell main body, a negative reference electrode is arranged between the outer wall of the glass probe and the inner wall of the plastic shell main body, and the bottom end of the negative reference electrode also penetrates out of the bottom through hole of the plastic shell main body and is exposed out of the side wall of the end part of the glass probe. The utility model has the advantages that: firstly, the negative reference electrode is exposed, the assembly is simpler and more firm, and the negative reference electrode is directly contacted with a measured medium, so that the formed measuring signal is more stable and accurate, accessories such as a signal amplifier and the like can be omitted, and the cost is saved; and secondly, the temperature sensor lead adopts a PVC covered wire, so that the anti-interference performance is better compared with the traditional coated wire, and the improvement of the measurement accuracy is facilitated.
Description
Technical field:
The utility model relates to the technical field of test instruments, in particular to a test probe of a PH pen.
The background technology is as follows:
PH pens, also known as PH test pens or PH meters, are used to measure the PH value of various media. The test probe of the PH pen mainly comprises a plastic shell, a glass electrode, a reference electrode and a temperature sensor, wherein a reference silver wire serving as a negative reference electrode in the existing PH pen is usually hidden in the plastic shell, only the bottom of the glass electrode is exposed, the negative reference electrode is required to be positioned in a design structure in the plastic shell, or is supported by a pasty reference liquid, so that the problems of infirm and the like are easy to occur, and the measurement is unstable; in addition, in the existing PH pen, the lead wire of the temperature sensor is a common coating wire, and the lead wire is easy to interfere with the temperature sensor during working, so that the measurement accuracy is improved.
The utility model comprises the following steps:
The utility model aims to overcome the defects in the prior art and provide a test probe of a PH pen.
The technical scheme adopted by the utility model is as follows: the utility model provides a PH pen's test probe, its includes plastic shell main part, installs in the plastic shell main part and the glass probe that wears out from its bottom through-hole, is provided with temperature sensor and positive reference electrode in the glass probe, is equipped with the reference liquid in the space between glass probe outer wall and the plastic shell main part inner wall, is equipped with negative reference electrode between glass probe outer wall and plastic shell main part inner wall, and the bottom of this negative reference electrode also wears out the bottom through-hole of plastic shell main part and exposes in the tip lateral wall of glass probe.
The part of the glass probe penetrating out of the through hole at the bottom of the plastic shell main body is in a tip shape. More test occasions or more narrow space tests can be applied.
The temperature sensor is located at the tip of the bottom of the glass probe, the lead of the temperature sensor is a PVC covered wire, and the upper end of the PVC covered wire penetrates out of the upper end of the glass probe.
The upper end of the positive reference electrode penetrates out of the upper end of the glass probe, and the lower end of the positive reference electrode is positioned in the bottom tip of the glass probe.
The upper end of the negative reference electrode is also higher than the upper end of the glass probe.
The utility model has the advantages that: firstly, the negative reference electrode is exposed, the assembly is simpler and more firm, and the negative reference electrode is directly contacted with a measured medium, so that the formed measuring signal is more stable and accurate, a signal amplifier can be omitted, and the cost is saved; and secondly, the temperature sensor lead adopts a PVC covered wire, so that the anti-interference performance is better compared with the traditional coated wire, and the improvement of the measurement accuracy is facilitated.
Description of the drawings:
FIG. 1 is a schematic cross-sectional view of a PH test probe of the present utility model;
Fig. 2 is an enlarged view of a portion of fig. 1 in accordance with the present utility model.
The specific embodiment is as follows:
As shown in fig. 1-2, the utility model relates to a test probe of a PH pen, which comprises a plastic housing main body 1, a glass probe 2 installed in the plastic housing main body 1 and penetrating from a bottom through hole 10 thereof, a temperature sensor 3 and a positive reference electrode 4 are arranged in the glass probe 2, a reference liquid 5 is filled in a space between the outer wall of the glass probe 2 and the inner wall of the plastic housing main body 1, a negative reference electrode 6 is arranged between the outer wall of the glass probe 2 and the inner wall of the plastic housing main body 1, the bottom end of the negative reference electrode 6 also penetrates through the bottom through hole 10 of the plastic housing main body 1 and is exposed out of the end side wall of the glass probe 2, and the length of the negative reference electrode 6 exposed out of the bottom through hole 10 of the plastic housing main body 1 is 0.1mm-10mm, preferably 1mm-6mm.
Through the exposure of the negative reference electrode 6, on one hand, the negative reference electrode 6 can be clamped between the outer wall of the glass probe 2 and the inner wall of the bottom through hole 10 because the negative reference electrode and the glass probe 2 pass through the bottom through hole 10 of the plastic shell main body 1 together when exposed, so that more firm positioning and assembly are realized, other assembly structures are not required, and the modeling and die design of the plastic shell main body 1 can be simplified; on the other hand, the exposed negative reference electrode 6 can be in direct contact with a medium during testing, so that the testing result is more stable and accurate.
The part of the glass probe 2 penetrating out of the through hole 10 at the bottom of the plastic shell main body 1 is in a tip shape, so that the glass probe can be suitable for more testing occasions or more narrow space tests.
The temperature sensor 3 is located at the tip of the bottom of the glass probe 1, the lead wire of the temperature sensor 3 is the PVC covered wire 31, the upper end part of the PVC covered wire 31 penetrates out of the upper end part of the glass probe 2, the PVC covered wire 31 is adopted as the lead wire of the temperature sensor 3, the temperature sensor 3 can be effectively prevented from being interfered, the accuracy of temperature measurement is improved, and the measurement accuracy of the whole PH pen is improved.
The upper end of the positive reference electrode 4 penetrates out of the upper end of the glass probe 1, and the lower end of the positive reference electrode is positioned in the bottom tip of the glass probe 1.
The upper end of the negative reference electrode 6 is also higher than the upper end of the glass probe 1 so as to be connected with a circuit board of the PH pen.
In summary, the advantages of the present utility model are mainly: firstly, the negative reference electrode is exposed, the assembly is simpler and more firm, and the negative reference electrode is directly contacted with a measured medium, so that the formed measuring signal is more stable and accurate, a signal amplifier can be omitted, and the cost is saved; and secondly, the temperature sensor lead adopts a PVC covered wire, so that the anti-interference performance is better compared with the traditional coated wire, and the improvement of the measurement accuracy is facilitated.
It is to be understood that the above embodiments are merely illustrative of the application of the principles of the present utility model, but not in limitation thereof. Various modifications and improvements may be made by those skilled in the art without departing from the spirit and substance of the utility model, and are also considered to be within the scope of the utility model.
Claims (6)
1. The utility model provides a PH pen's test probe, its includes the plastic shell main part, installs in the plastic shell main part and the glass probe that wears out from its bottom through-hole, is provided with temperature sensor and positive reference electrode in the glass probe, and the filling is equipped with the reference liquid in the space between glass probe outer wall and the plastic shell main part inner wall, its characterized in that: a negative reference electrode is arranged between the outer wall of the glass probe and the inner wall of the plastic shell main body, and the bottom end of the negative reference electrode also penetrates out of the bottom through hole of the plastic shell main body and is exposed out of the side wall of the end part of the glass probe.
2. The PH pen test probe according to claim 1, wherein: the length of the through hole of the negative reference electrode exposed out of the bottom of the plastic shell main body is 0.1mm-10mm.
3. The PH pen test probe according to claim 1, wherein: the part of the glass probe penetrating out of the through hole at the bottom of the plastic shell main body is in a tip shape.
4. The PH pen test probe according to claim 1 or 2, wherein: the temperature sensor is located at the tip of the bottom of the glass probe, the lead of the temperature sensor is a PVC covered wire, and the upper end of the PVC covered wire penetrates out of the upper end of the glass probe.
5. The PH pen test probe according to claim 1, wherein: the upper end of the positive reference electrode penetrates out of the upper end of the glass probe, and the lower end of the positive reference electrode is positioned in the bottom tip of the glass probe.
6. The PH pen test probe according to claim 1 or 2 or 5, wherein: the upper end of the negative reference electrode is also higher than the upper end of the glass probe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322271253.XU CN220983184U (en) | 2023-08-22 | 2023-08-22 | PH pen test probe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322271253.XU CN220983184U (en) | 2023-08-22 | 2023-08-22 | PH pen test probe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220983184U true CN220983184U (en) | 2024-05-17 |
Family
ID=91065531
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322271253.XU Active CN220983184U (en) | 2023-08-22 | 2023-08-22 | PH pen test probe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220983184U (en) |
-
2023
- 2023-08-22 CN CN202322271253.XU patent/CN220983184U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |