CN210427436U - Reference electrode, non-liquid-filling ORP sensor and ORP measuring device - Google Patents

Abstract

The utility model provides a reference electrode, non-liquid filling formula ORP sensor and ORP measuring device, the reference electrode includes: an electrode protection tube; the salt bridge is arranged at the sensing end of the electrode protection tube; a gel electrolyte filled in the electrode protection tube; a reference electrode conductor, one end of which is arranged in the gel electrolyte and the other end of which extends out of the electrode protection tube; and the reference electrode lead is connected with the other end of the reference electrode conductor. The reference electrode and the non-liquid-filling ORP sensor effectively solve the problem of liquid leakage caused by filling saturated Kcl solution, and improve the stability; the reference electrode effectively eliminates the liquid contact potential, and improves the detection precision of the sensor.

Description

Reference electrode, non-liquid-filling ORP sensor and ORP measuring device

Technical Field

The utility model relates to an oxidation reduction measures and sets up technical field, specific theory has related to a reference electrode, non-liquid filling formula ORP sensor and ORP measuring device.

Background

In water, each substance has its own redox properties, which can be simply understood as: microscopically, each different substance has a certain oxidation-reduction capability, and the substances with different oxidation-reduction capabilities can mutually influence each other to finally form a certain macroscopic oxidation-reduction capability. ORP (Oxidation-Reduction Potential) can be used as a comprehensive index considering the environmental conditions of a medium (including soil, natural water and the like), and can also represent the Oxidation-Reduction capacity of the medium environment. ORP value is commonly used to indicate the degree of cleanliness of a water environment, and its value is in mV, which indicates the concentration of chlorinated water that is effective in killing bacteria and preventing microbial growth, and is an important measure of the redox capacity of an aqueous solution. Many of the natural phenomena, chemistry, and production processes involved in aqueous solutions are related to the redox capacity of the water body, i.e., the ORP value. Therefore, the ORP value of water quality needs to be detected in various aspects such as industry, agriculture, medicine, environmental protection, scientific research, civil use and the like.

The ORP value is the value reflecting the macroscopic oxidation-reduction reaction of all species in the aqueous solution. The higher the redox potential, the stronger the oxidation, and the lower the potential, the weaker the oxidation. A positive potential indicates that the solution exhibits some degree of oxidation, while a negative potential indicates that the solution exhibits reduction.

A conventional ORP sensor includes an ORP measurement electrode, a reference electrode, and an mv meter. The interior of the ORP sensor needs to be added with filling liquid (KCL), and the reference electrode is immersed in the filling liquid (KCL) to protect the reference electrode, so that the service life of the sensor is prolonged. However, conventional ORP sensors suffer from the following disadvantages:

(1) filling liquid (KCL) needs to be added into the ORP sensor, so that the problem of liquid leakage exists;

(2) the assembly is complicated and time and labor consuming.

In order to solve the above problems, people are always seeking an ideal technical solution.

Disclosure of Invention

The utility model aims at the not enough of prior art to a reference electrode and non-liquid filling formula ORP sensor are provided.

In order to realize the purpose, the utility model discloses the technical scheme who adopts is:

the utility model discloses the first aspect provides a reference electrode, and this reference electrode includes:

an electrode protection tube;

the salt bridge is arranged at the sensing end of the electrode protection tube;

a gel electrolyte filled in the electrode protection tube;

a reference electrode conductor, one end of which is arranged in the gel electrolyte and the other end of which extends out of the electrode protection tube;

and the reference electrode lead is connected with the other end of the reference electrode conductor.

A second aspect of the present invention provides a non-flooded ORP sensor comprising the reference electrode; the device also comprises a measuring electrode and a measuring electrode lead wire connected with the measuring electrode.

Based on the above, the non-liquid filling type ORP sensor further comprises a sensor shell and a sealing gasket;

one end of the sensor shell is provided with a lead outlet, and the other end of the sensor shell is matched with the sealing washer;

and the sensing end of the measuring electrode and the sensing end of the electrode protection tube are clamped on the sealing gasket.

The utility model discloses the third aspect provides an ORP measuring device, ORP measuring device includes voltage measurement device, voltage measurement device with non-liquid-filled type ORP sensor's reference electrode lead wire and measuring electrode pin connection.

The utility model discloses relative prior art has substantive characteristics and progress, specific theory:

1) the utility model provides a reference electrode, which is different from the reference electrode in the traditional ORP sensor, the reference electrode structure effectively solves the leakage problem of the traditional ORP sensor caused by filling saturated Kcl solution, and also avoids the unstable sensor signal caused by the liquid fluidity;

the reference electrode adopts gel electrolyte, so that the volatilization of liquid is avoided; the reference electrode can effectively eliminate liquid contact potential, and improves the detection precision of the ORP sensor;

2) the utility model provides a non-liquid-filling ORP sensor, wherein a sensor shell, a reference electrode and a measuring electrode are packaged through a sealing washer, the assembly mode is simple, time and labor are saved, and the production efficiency is greatly improved;

and the sensor shell, the reference electrode and the measuring electrode are independent, so that a user can replace and freely combine the sensor shell, the reference electrode and the measuring electrode as required, and the repeatability is very good.

Drawings

Fig. 1 is a schematic structural diagram of a reference electrode of the present invention.

FIG. 2 is a schematic diagram of the structure of a non-flooded ORP sensor of the present invention.

Fig. 3 is a schematic structural diagram of the measuring electrode of the present invention.

In the figure: 1. a sensor housing; 2. a reference electrode; 21. a reference electrode conductor; 22. a gel electrolyte; 23. an electrode protection tube; 24. a salt bridge; 3. a measurement electrode lead; 31. a sensing end of the measurement electrode; 4. a sealing gasket; 5. a voltage measurement device.

Detailed Description

The technical solution of the present invention will be described in further detail through the following embodiments.

Example 1

As shown in fig. 1, a reference electrode 2 comprises: an electrode protection tube 23; a salt bridge disposed at a sensing end of the electrode protection tube 23; a gel electrolyte 22 filled in the electrode protection tube 23; a reference electrode conductor 21, one end of the reference electrode conductor 21 being disposed in the gel electrolyte 22, and the other end being disposed to protrude out of the electrode protection tube 23; and a reference electrode lead connected to the other end of the reference electrode conductor 21.

In this embodiment, the gel electrolyte 22 is colloidal potassium chloride; the reference electrode conductor 21 is a silver wire, and a silver chloride layer is laid on the end of the silver wire arranged in the gel electrolyte 22. The salt bridge 24 adopts a sand core, so that the liquid connection potential can be effectively eliminated, and the detection precision of the sensor is improved.

Example 2

Based on example 1, this example presents a specific implementation of a non-liquid filled ORP sensor, as shown in fig. 2 and 3, that includes the reference electrode 2; the device also comprises a measuring electrode and a measuring electrode lead 3 connected with the measuring electrode.

In this embodiment, the non-liquid filled ORP sensor further includes a sensor housing 1 and a sealing gasket 4; a lead outlet is formed in one end of the sensor shell 1 to allow the reference electrode lead and the measuring electrode lead to extend out of the sensor shell 1, and the other end of the sensor shell is matched with the sealing gasket 4; the sensing end 31 of the measuring electrode and the sensing end of the electrode protection tube are clamped on the sealing washer 4; the sealing performance of the non-liquid-filling ORP sensor is improved, and the stability of the non-liquid-filling ORP sensor is ensured.

During the equipment, will reference electrode 2 with measuring electrode installs in sensor housing 1, through seal ring 4 encapsulate can, the equipment mode is simple and convenient, labour saving and time saving has improved production efficiency greatly. And the sensor shell, the reference electrode and the measuring electrode of the non-liquid-filling ORP sensor are independent, so that a user can replace and freely combine the parts as required even if a certain part has a problem, the repeatability is very good, and the cost is saved for the user.

In this embodiment, the gel electrolyte is colloidal potassium chloride; the reference electrode conductor is a silver wire, and a silver chloride layer is laid on one end of the silver wire; the measuring electrode is made of platinum metal. In other embodiments, the measuring electrode is made of gold or silver.

Example 3

This embodiment provides an ORP measuring device, uses non-liquid-filled formula ORP sensor, ORP measuring device includes voltage measurement device 5, voltage measurement device 5 with non-liquid-filled formula ORP sensor's reference electrode lead wire and measuring electrode lead wire 3 are connected.

When the device works, a measuring electrode, a reference electrode 2 and a water sample to be measured of the non-liquid-filling ORP sensor form a primary battery; the measurement is performed by the measuring electrode, the measuring electrode produces a millivolt output based on the oxidation or reduction reaction that occurs, while the reference electrode produces a constant millivolt output, and the voltage measuring device measures the potential difference between the measuring electrode and the reference electrode. Therefore, a reference basis is provided for obtaining the ORP value of the water sample to be measured.

In this embodiment, the voltage measuring device 5 is a voltmeter.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention and not to limit it; although the present invention has been described in detail with reference to preferred embodiments, it should be understood by those skilled in the art that: the invention can be modified or equivalent substituted for some technical features; without departing from the spirit of the present invention, it should be understood that the scope of the claims is intended to cover all such modifications and variations.

Claims (9)

1. A reference electrode, comprising:

an electrode protection tube;

the salt bridge is arranged at the sensing end of the electrode protection tube;

a gel electrolyte filled in the electrode protection tube;

a reference electrode conductor, one end of which is arranged in the gel electrolyte and the other end of which extends out of the electrode protection tube;

and the reference electrode lead is connected with the other end of the reference electrode conductor.

2. The reference electrode of claim 1, wherein: the gel electrolyte is colloidal potassium chloride.

3. The reference electrode of claim 1, wherein: the reference electrode conductor is a silver wire, and a silver chloride layer is laid on one end of the silver wire.

4. A non-liquid filled ORP sensor is characterized in that: comprising the reference electrode of claim 1; the device also comprises a measuring electrode and a measuring electrode lead wire connected with the measuring electrode.

5. The non-flooded ORP sensor of claim 4, wherein: the measuring electrode is made of platinum metal.

6. The non-flooded ORP sensor of claim 4, wherein: the measuring electrode is made of gold or silver.

7. The non-flooded ORP sensor of claim 4, wherein: the gel electrolyte is colloidal potassium chloride; the reference electrode conductor is a silver wire, and a silver chloride layer is laid on one end of the silver wire.

8. A non-liquid filled ORP sensor according to any one of claims 5 to 7 wherein: the sensor also comprises a sensor shell and a sealing gasket;

one end of the sensor shell is provided with a lead outlet, and the other end of the sensor shell is matched with the sealing washer;

and the sensing end of the measuring electrode and the sensing end of the electrode protection tube are clamped on the sealing gasket.

9. An ORP measurement device, using the non-flooded ORP sensor of claim 8, wherein: the ORP measuring device comprises a voltage measuring device, and the voltage measuring device is connected with a reference electrode lead and a measuring electrode lead of the non-liquid-filling ORP sensor.

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