JP6010475B2 - Constant potential electrolytic gas sensor, storage method thereof, and storage jig for constant potential electrolytic gas sensor - Google Patents

Description

  The present invention relates to a constant potential electrolytic gas sensor, a storage method thereof, and a storage jig for a constant potential electrolytic gas sensor.

  At present, for example, when detecting a toxic gas in a semiconductor manufacturing factory, the gas concentration can be detected with high sensitivity and high accuracy with excellent selectivity of the target gas to be detected. A constant potential electrolytic gas sensor using an electrolytic reaction is widely used.

  The constant potential electrolysis gas sensor is based on the detection principle that measures the electrolysis current associated with the oxidation reaction or reduction reaction when the detection target gas is electrolyzed at a constant potential, and maintains the equilibrium state in which the reaction between the working electrode and the counter electrode is stable. Is required.

  Thus, in the initial state when the constant potential electrolytic gas sensor is used for the first time, for example, after the constant potential electrolytic gas sensor is mounted on the gas detector (including after sensor replacement), the constant potential electrolytic gas sensor is used. There is a problem that it takes a long time to obtain a stable output.

  In order to solve such a problem, for example, in Patent Document 1, in a case where an applied voltage is not required for measurement, that is, in a case where the electrolytic potential of the detection target gas is 0 mV, a short plug is used, for example. It is described that the surface state of each gas detection electrode including the reference electrode is made uniform.

  In addition, in the case where an applied voltage is required for measurement and the electrolytic potential of the detection target gas is not 0 mV, for example, a dedicated jig capable of applying a potential to each gas detection electrode is used. For example, the same potential state is maintained.

JP 2010-185855 A

  The present invention has been made based on the circumstances as described above, and its purpose is to short-circuit the connection terminals related to each gas detection electrode in order to shorten the time required for output stabilization during use. Is to provide a constant-potential electrolytic gas sensor, a storage method thereof, and a storage jig for the constant-potential electrolytic gas sensor.

The constant potential electrolytic gas sensor of the present invention has at least a working electrode and a counter electrode, and each of a plurality of planar connection terminals connected to the working electrode and the counter electrode via power feeding leads is one end surface of the casing. A constant potential electrolytic gas sensor exposed to the outside at
Each of the connection terminals is made of a metal having magnetism,
When the constant potential electrolytic gas sensor is stored, a conductive magnet for short-circuiting each of the connection terminals is configured to be mountable using the magnetic force of the conductive magnet.

In the constant potential electrolytic gas sensor of the present invention, each of the connection terminals can be made of a stainless steel having magnetism.
In the constant potential electrolysis gas sensor of the present invention, it is preferable that a magnet mounting portion for receiving a part of the conductive magnet is formed on one end surface of the casing.

  Furthermore, the constant potential electrolytic gas sensor of the present invention may further include a reference electrode, and a connection terminal related to the reference electrode may be exposed to the outside at one end surface of the casing.

  The method for storing a constant potential electrolytic gas sensor according to the present invention is characterized in that it has at least a working electrode and a counter electrode, and each of the connection terminals related to the working electrode and the counter electrode is electrically conductive with respect to a constant potential electrolytic gas sensor made of a metal having magnetism. The conductive magnet is mounted using the magnetic force of the conductive magnet, and each of the connection terminals is stored in a state of being short-circuited by the conductive magnet.

  In the storage method of the constant potential electrolytic gas sensor of the present invention, a neodymium magnet can be used as the conductive magnet.

Further, in the storage method for the constant potential electrolytic gas sensor of the present invention, the constant potential electrolytic gas sensor further includes a reference electrode, and a connection terminal related to the reference electrode is exposed to the outside at one end surface of the casing. And
The connection terminals related to the working electrode, the counter electrode, and the reference electrode are short-circuited by the conductive magnet.

The storage jig of the constant potential electrolytic gas sensor of the present invention comprises a sensor holding part consisting of a recess for receiving the above constant potential electrolytic gas sensor,
A conductive magnet is fixed to the bottom surface of the sensor holding unit, and the constant potential electrolytic gas sensor is held by the magnetic force of the conductive magnet in a state where each connection terminal is short-circuited by the conductive magnet. It is characterized by.

The storage jig for a constant potential electrolytic gas sensor according to the present invention can be configured to include a plurality of sensor holding portions.
Moreover, in the storage jig of the constant potential electrolytic gas sensor of the present invention, the conductive magnet can be composed of a neodymium magnet.

  According to the constant potential electrolysis gas sensor of the present invention, the connection terminals related to each gas detection electrode provided in an exposed state on one end surface of the casing are made of magnetic metal, so to speak, a short plug pin. A conductive magnet can be used. Therefore, by attaching the conductive magnet during storage of the constant potential electrolytic sensor, a state in which each connection terminal is short-circuited can be obtained very easily and reliably.

  According to the method for storing a constant potential electrolytic gas sensor of the present invention, an extremely simple operation is performed in which a conductive magnet is attached to a connection terminal of a constant potential electrolytic gas sensor using the magnetic force of the conductive magnet. Therefore, when the constant potential electrolytic gas sensor is stored, it is possible to obtain a state where each connection terminal is short-circuited very easily and reliably, and the management of the constant potential electrolytic gas sensor itself is facilitated.

  According to the storage jig for a constant potential electrolytic gas sensor of the present invention, the magnetic force of the conductive magnet is measured in a state where the connection terminal of each gas detection electrode is short-circuited by the conductive magnet. By being configured to be used and held, a state in which each connection terminal is short-circuited can be obtained very easily and reliably when the constant potential electrolytic gas sensor is stored. In addition, the structure of the storage jig itself can be simplified, and it can also be used as a carrier during transportation of the constant potential electrolytic gas sensor, so that high convenience can be obtained.

It is a disassembled perspective view which shows the outline of a structure in an example of the constant potential electrolytic gas sensor of this invention. It is sectional drawing along the center axis | shaft of a sensor case of the constant potential electrolytic gas sensor shown in FIG. It is a top view which shows the outline of a structure in an example of the storage jig | tool of the constant potential electrolytic gas sensor of this invention. It is the sectional view on the AA line in FIG. It is sectional drawing for description which shows the other use condition of the storage jig | tool shown in FIG. It is a perspective view which shows the other example of the storage method of a constant potential electrolytic gas sensor.

  Hereinafter, embodiments of the present invention will be described in detail.

[Constant potential electrolysis gas sensor]
The constant potential electrolysis gas sensor according to the present invention is, for example, one that does not require an applied voltage at the time of measurement, that is, one in which the electrolysis potential of the gas to be detected is 0 mV. The connection terminal related to the gas detection electrode is short-circuited (conducted).

FIG. 1 is an exploded perspective view showing an outline of a configuration of an example of a constant potential electrolytic gas sensor of the present invention. FIG. 2 is a cross-sectional view of the potentiostatic gas sensor shown in FIG. 1 along the central axis of the sensor case.
The constant potential electrolytic gas sensor 10 includes a sensor case 11 including a substantially bottomed cylindrical case body 12 and a lid 15 attached to an opening of the case body 12. Inside the sensor case 11, an electrolytic solution storage space S in which the electrolytic solution is stored is formed.

  On the outer surface (the lower surface in FIG. 2) of the bottom wall of the case body 12, ribs 12a extending over the entire circumference are formed so as to protrude in the axial direction so that the outer circumferential surface is continuous. A magnet mounting portion 13 is formed which is a recess for receiving a part of a later-described conductive magnet 70 used when the gas sensor 10 is stored.

  A plurality of gas permeable through holes 16 each extending in the axial direction of the sensor case 11 are formed in the central portion of the outer surface (the upper surface in FIG. 2) of the lid 15, and these gas permeable through holes 16 are formed on the outer surface. A sheet-like dustproof filter 20 is disposed in a state of covering from the side. Further, a gas permeable diaphragm 21 is provided on the outer surface of the dust filter 20 with its peripheral edge fixed to the outer surface of the lid 15.

  Inside the sensor case 11, a sheet-like counter electrode 30 is provided so as to cover the gas transmission through hole 16 of the lid 15 from the inner surface side. The counter electrode 30 has its peripheral edge fixed to the inner surface of the lid 15 by, for example, a ring-shaped double-sided adhesive tape 22.

  Further, inside the sensor case 11, an electrode holder 25 having a holding portion 26 for holding the working electrode 40 and the reference electrode 50 formed on one surface (upper surface in FIG. 2) is a sealing member made of, for example, an O-ring 24. And is fixed to the lid 15 in a pressed state. A sheet-like electrolyte solution holding member 28 made of, for example, water-containing paper is interposed between one surface (the upper surface in FIG. 2) of the electrode holder 25 and the inner surface (the lower surface in FIG. 2) of the counter electrode 30. ing.

  Reference numeral 31 in FIGS. 1 and 2 denotes a power supply lead wire for the counter electrode 30, one end of which is connected to the counter electrode 30 and the other end is formed side by side with the electrolyte solution containing space S. It is led into the magnet mounting portion 13 in the case main body 12 through the working space L and connected to the connection terminal 32 related to the counter electrode 30. Although not shown, the power supply leads 41 and 51 related to the working electrode 40 and the reference electrode 50 also have one end connected to the working electrode 40 and the reference electrode 50 and the other end connected to the case body 12. Are connected to connection terminals 42 and 52 related to the working electrode 40 and the reference electrode 50, respectively. Here, the power supply lead wires 31, 41, 51 are made of, for example, platinum.

  The connection terminals 42, 32, and 52 related to the working electrode 40, the counter electrode 30, and the reference electrode 50 are configured by, for example, land-shaped planar terminals, and are terminal arrangements that are formed by recesses formed on the outer surface of the bottom wall of the case body 12. For example, it is press-fitted and fixed to a portion (not shown). In the magnet mounting portion 13, for example, a sealing member 56 a filled with a ceramic adhesive is provided, and outer surfaces (terminal surfaces) 43, 33, 53 of the connection terminals 42, 32, 52 are provided. It is in a state exposed to the outside (see FIG. 6). Here, the terminal surfaces 43, 33, 53 of the connection terminals 42, 32, 52 are located, for example, in the same plane.

  Each of the connection terminals 42, 32, and 52 is made of a magnetic metal having magnetism, and for example, magnetic stainless steel, iron, nickel, or the like can be used. Specifically, for example, SUS430 (ferrite type) can be exemplified, but martensitic or austenitic ferrite (dual phase) stainless steel may be used.

  1 and 2, reference numeral 23 denotes a display label member that serves as a mark for positioning. For example, a detection target gas name is written on the outer surface of the display label member. 57 is a pressure adjusting member, 55 is an electrode wire assembly in which the power supply lead wires 41, 31, 51 are related to each gas detection electrode in a state where electrical insulation is ensured, and 56b is, for example, ceramic-based adhesive It is the sealing member which consists of an agent.

  Hereinafter, the storage jig of the above-described potentiostatic gas sensor 10 will be described.

[Storage jig]
FIG. 3 is a plan view schematically showing the configuration of an example of a storage jig of the constant potential electrolytic gas sensor according to the present invention. 4 is a cross-sectional view taken along line AA in FIG.
The storage jig 60 in this example has a rectangular parallelepiped shape elongated in one direction, and is formed at a position where a plurality of through holes 61 each having a circular opening shape are arranged in one direction. The internal space of each through hole 61 is partitioned by a partition wall 62, and a part of the constant potential electrolytic gas sensor 10 is received by a space portion (upper space portion in FIG. 4) on one surface side in the central axis direction of the through hole 61. A sensor holding part 63 is formed to hold.

  A conductive magnet 70 is disposed on one surface of the partition wall 62 in each sensor holding portion 63. In this example, for example, a ring-shaped neodymium magnet is used as the conductive magnet 70, and one magnet surface (flat surface, hatched for convenience in FIG. 3) 71 is formed from one surface of the partition wall 62. In a protruding state, it is embedded in the partition wall 62 and fixed by, for example, an adhesive. Reference numeral 62a in FIG. 4 denotes an adhesive escape for allowing the conductive magnet 70 to escape to the other side so that the adhesive does not protrude from the sensor terminal side when the conductive magnet 70 is adhered to the sensor holding portion 63 by an adhesive. This is a through hole.

  The inner diameter dimension of each sensor holding portion 63 is larger than the outer diameter dimension of the constant potential electrolytic gas sensor 10. For example, a gap is formed between the outer peripheral surface of the constant potential electrolytic gas sensor 10 and the inner peripheral surface of the sensor holding portion 63. It is preferable that it is set as a size. Thereby, since the dimensional error is compensated by the minute displacement of the constant potential electrolytic gas sensor 10 in the sensor holding part 63, the terminal surfaces 33, 43 of the connection terminals 32, 42, 52 in the constant potential electrolytic gas sensor 10 are compensated. , 53 can be securely attracted to the magnet surface 71 of the conductive magnet 70.

  As shown in FIG. 5, the storage jig 60 is formed so that a plurality of the same configuration can be stacked in the central axis direction of the through hole 61. The space portion on the other surface side in the axial direction (the lower space portion in FIG. 4) protrudes outward from one surface of the storage jig 60 of the potentiostatic gas sensor 10 held by another storage jig. It is configured as a part receiving part 64.

Thus, in the storage jig 60 described above, the gas detection electrodes of the working electrode 40, the counter electrode 30, and the reference electrode 50 can be obtained simply by inserting the constant potential electrolytic gas sensor 10 into the sensor holding portion 63. Each of the connection terminals 42, 32, 52 according to the above is magnetically attracted to the conductive magnet 70 and short-circuited (conducted).
That is, when the constant potential electrolytic gas sensor 10 is inserted into the sensor holding part 63, the conductive magnet protrudes in the sensor holding part 63 of the storage jig 60 to the magnet mounting part 13 of the constant potential electrolytic gas sensor 10. 70 is received and the terminal surfaces 33, 43, 53 of the connection terminals 32, 42, 52 associated with each gas detection electrode are brought into contact with the magnet surface 71 of the conductive magnet 70, so that the conductive magnet 70 Adsorbed and held by magnetic force. At this time, since there are three connection terminals of the constant potential electrolytic gas sensor 10, a conductive state by the conductive magnet 70 is ensured. The same applies to, for example, a constant-potential electrolysis gas sensor having no reference electrode (two electrodes).

  As described above, according to the constant potential electrolytic gas sensor 10 having the above-described configuration, the connection terminals 42 associated with the working electrode 40, the counter electrode 30, and the reference electrode 50 that are provided exposed on one end surface of the sensor case 11, Since each of 32 and 52 is made of a metal having magnetism, for example, when the constant potential electrolysis sensor 10 is stored, for example, before it is incorporated in a gas detector including sensor replacement, a conductive magnet is used. It can be used as a “short plug pin”. Accordingly, when the constant potential electrolytic gas sensor 10 is stored, the conductive magnet 70 is mounted on the magnet mounting portion 13 of the constant potential electrolytic gas sensor 10 by the magnetic force of the conductive magnet 70, thereby connecting the connection terminals 32 and 42. , 52 can be very easily and reliably obtained by short-circuiting (conducting) by the conductive magnet 70.

In addition, since it is only necessary to perform a very simple operation of mounting the conductive magnet 70 using the magnetic force of the conductive magnet 70, the management of the constant potential electrolytic gas sensor 10 itself becomes easy.
Furthermore, the structure of the storage jig 60 itself can be simplified, and it can also be used as a carrier during transportation of the potentiostatic gas sensor, so that high convenience can be obtained.

As mentioned above, although embodiment of this invention was described, this invention is not limited to said embodiment, A various change can be added.
For example, the constant potential electrolytic sensor may have a configuration without a reference electrode.
As a method for storing the constant potential electrolytic gas sensor, for example, as shown in FIG. 6, the conductive magnet 70 is connected to the connection terminals 32, 42, 52 associated with the gas detection electrodes in the constant potential electrolytic gas sensor 10. It may be simply attached by magnetic adsorption.
Furthermore, the storage jig is not limited to the one according to the above-described embodiment, and may be a plate shape in which the sensor holding portions are formed side by side in the vertical and horizontal directions. It may be configured to hold a potential electrolysis gas sensor.

DESCRIPTION OF SYMBOLS 10 Constant potential electrolytic gas sensor 11 Sensor case 12 Case main body 12a Rib 13 Magnet mounting part 15 Cover body 16 Gas permeation through-hole 20 Dust-proof filter 21 Gas permeable diaphragm 22 Double-sided adhesive tape 23 Display label member 24 O-ring 25 Electrode Holder 26 Holding portion 28 Electrolyte holding member 30 Counter electrode 31 Lead wire for power supply related to counter electrode 32 Connection terminal related to counter electrode 33 Terminal surface 40 Working electrode 41 Lead wire for power supply related to working electrode 42 Connection terminal related to working electrode 43 Terminal surface DESCRIPTION OF SYMBOLS 50 Reference electrode 51 Lead wire for electric power feeding concerning reference electrode 52 Connection terminal concerning reference electrode 53 Terminal surface 55 Electrode wire assembly 56a, 56b Sealing member 57 Pressure adjusting member S Electrolyte storage space L Lead wire arrangement space 60 For storage Jig 61 Through hole 62 Partition 62a Adhesive escape through hole 63 Sensor holding part 64 Receiving part 70 Conductive magnet 71 Magnet surface

Claims (10)

Constant-potential electrolysis having at least a working electrode and a counter electrode, and each of a plurality of planar connection terminals connected to the working electrode and the counter electrode via power supply leads, respectively, exposed to one end surface of the casing Gas sensor,
Each of the connection terminals is made of a metal having magnetism,
A constant potential electrolytic gas sensor, characterized in that a conductive magnet for short-circuiting each of the connection terminals can be mounted using the magnetic force of the conductive magnet when the constant potential electrolytic gas sensor is stored. .   2. The constant potential electrolytic gas sensor according to claim 1, wherein each of the connection terminals is made of stainless steel having magnetism.   The constant potential electrolytic gas sensor according to claim 1 or 2, wherein a magnet mounting portion for receiving a part of the conductive magnet is formed on one end surface of the casing.   The constant potential electrolytic gas sensor according to any one of claims 1 to 3, further comprising a reference electrode, wherein a connection terminal related to the reference electrode is exposed to the outside at one end face of the casing. .   For a constant potential electrolytic gas sensor that has at least a working electrode and a counter electrode, and each of the connection terminals related to the working electrode and the counter electrode is made of a magnetic metal, the conductive magnet uses the magnetic force of the conductive magnet. A storage method for a constant potential electrolytic gas sensor, wherein the storage terminal is stored in a state where each of the connection terminals is short-circuited by the conductive magnet.   The storage method for a constant potential electrolytic gas sensor according to claim 5, wherein a neodymium magnet is used as the conductive magnet. The constant potential electrolytic gas sensor further includes a reference electrode, and a connection terminal related to the reference electrode is exposed to the outside at one end surface of the casing,
The storage of the potentiostatic gas sensor according to claim 5 or 6, wherein each connection terminal related to the working electrode, the counter electrode, and the reference electrode is short-circuited by the conductive magnet. Method. The sensor holding part which consists of a recess which receives the constant potential electrolytic gas sensor in any one of Claims 1-4 is provided,
A conductive magnet is fixed to the bottom surface of the sensor holding unit, and the constant potential electrolytic gas sensor is held by the magnetic force of the conductive magnet in a state where each connection terminal is short-circuited by the conductive magnet. A storage jig for a potentiostatic gas sensor characterized by   The jig for storing a potentiostatic gas sensor according to claim 8, comprising a plurality of sensor holding portions.   The storage jig for a potentiostatic gas sensor according to claim 8 or 9, wherein the conductive magnet is a neodymium magnet.

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