CN202770804U - Multi-parameter sensor for measuring pH (potential of hydrogen) value, conductivity and temperature - Google Patents

Multi-parameter sensor for measuring pH (potential of hydrogen) value, conductivity and temperature Download PDF

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Publication number
CN202770804U
CN202770804U CN 201220504924 CN201220504924U CN202770804U CN 202770804 U CN202770804 U CN 202770804U CN 201220504924 CN201220504924 CN 201220504924 CN 201220504924 U CN201220504924 U CN 201220504924U CN 202770804 U CN202770804 U CN 202770804U
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sensor
electrode
housing
temperature
conductivity
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CN 201220504924
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王学良
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ZHAOYUAN DAMING METER CO Ltd
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ZHAOYUAN DAMING METER CO Ltd
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Abstract

The utility model relates to the technical field of water quality testing devices, and particularly discloses a multi-parameter sensor for measuring a pH (potential of hydrogen) value, conductivity and temperature. The multi-parameter sensor comprises a sensor shell and a glass electrode shell, and is characterized in that the glass electrode shell is sleeved in the sensor shell, and a conductivity measuring component and a temperature measuring element are respectively arranged on the sensor shell. The conductivity measuring component comprises a first conductivity electrode, an insulator and a second conductivity electrode which are sequentially sleeved on the sensor shell. An annular cavity is arranged between the sensor shell and the glass electrode shell, replenishing liquor and compressed gas are filled in the annular cavity, and a replenishing liquor hole for communicating the annular cavity with the inside of the glass electrode shell is arranged on the glass electrode shell. A measuring probe is used for simultaneously measuring three parameters including the pH value, the conductivity and the temperature, field installation and uniform signal extraction are facilitated, the cost performance of the sensor is greatly improved, and the service life of the sensor is greatly prolonged.

Description

A kind of pH value, conductivity and temperature multi-parameter sensor
Technical field
The utility model relates to water quality or solution parameter pick-up unit technical field, relates in particular to a kind of pH value, conductivity and temperature multi-parameter sensor.
Background technology
In commercial production or environmental protection, be the basic demand of carrying out Industry Control to the detection of solution parameter or water quality.Usually the determination and analysis of solution or water quality related to a plurality of parameters such as temperature, pH value and conductivity.Present same type of sensor mostly is simple function, and the occasion needing multiparameter to detect generally need to arrange respectively different sensors.This set not only make measure facility loaded down with trivial details, be not easy to that parameter signal is unified to be processed, and because the difference of each installation of sensors position can cause the error to solution or water quality analysis-by-synthesis, be single use and the manufacturing cost of also having increased of sensor function again.
In addition, because the pH glass electrode is in test, reference buffer solution need to permeate to detected solution by salt bridge, therefore inevitably causes following problem: the one, and the chlorine ion concentration in the reference solution has caused the slow drift of measurement result progressively changing.For the very high measurement occasion of pH accuracy requirement, need to electrode regular carry out verification, so not only bothersome, and be unfavorable for very much continuous coverage; The 2nd, when the pressure of reference solution is lower than the pressure of solution to be measured, can produce solution to be measured by the inverse osmosis of salt bridge to reference solution, can cause the metering misalignment like this, even cause sensor failure; The 3rd, along with the loss of reference solution, make measuring accuracy not reach requirement, and then cause sensor to scrap, serviceable life is short.
The utility model content
The utility model provides a kind of pH value, conductivity and temperature multi-parameter sensor for above-mentioned the deficiencies in the prior art.With the laying of simplifying the in-site measurement facility with increase water quality or the parameter precision of analysis of solution, and be conducive to improve the cost performance of sensor, also improve life-span and the stability of pH value measurement glass electrode simultaneously.
The technical scheme that the utility model solves the problems of the technologies described above is as follows: a kind of pH value, conductivity and temperature multi-parameter sensor, comprise sensor housing and glass electrode housing, it is characterized in that, described glass electrode housing is sleeved in the described sensor housing, also is respectively equipped with on described sensor housing for conductance measurement assembly and the temperature element of measuring the conductivity parameter.
The beneficial effects of the utility model are: the measurement original paper of pH value, conductivity and temperature parameter is integrated in the housing, realized that a measuring sonde measures three parameters simultaneously, the one, be convenient to on-the-spot the installation, the 2nd, processing is drawn in the unification that is convenient for measuring signal, and the 3rd, improved the analysis precision of solution or water quality.Also greatly improved in addition the cost performance of sensor.
On the basis of technique scheme, the utility model can also be done following improvement.
Further, described conductance measurement assembly comprises the first conductance electrode, insulator and the second conductance electrode that is sleeved on successively on the described sensor housing, and described temperature element is the platinum resistance that is embedded on the described sensor housing.
Adopt the beneficial effect of above-mentioned further scheme to be, the conductance measurement modular construction is simple, uses reliable.The small and exquisite practicality of platinum resistor temperature measuring element.
Further, described temperature element is embedded on the sensor housing of described conductance electrode inner side.
Adopt the beneficial effect of above-mentioned further scheme to be, temperature element is arranged on the sensor housing of described conductance electrode inner side, be conducive to reduce liquid flow to thermometric influence of fluctuations, conductance electrode also plays a protective role to temperature element simultaneously.
Further, be provided with toroidal cavity between described sensor housing and the glass electrode housing, charge additional liquid and pressure gas in the described toroidal cavity, be provided with the fluid infusion hole that is communicated with described toroidal cavity and described glass electrode enclosure interior at described glass electrode housing.
Adopt the beneficial effect of above-mentioned further scheme to be, because said structure setting, pressure by pressure gas so that the additional liquid in the toroidal cavity fill into endlessly in the reference buffer solution in the glass electrode housing, the life-span of this sensor is prolonged greatly, compare the prior art of not replenishing liquid, can improve 3~5 times its serviceable life, and external transfusion bottle electrolyte replenishing structure has compared to existing technology then dwindled sensor bulk greatly; In addition, because the compressed gas physical efficiency keeps the suitable pressure in the reference buffer solution, also avoided the inverse osmosis of detected solution, guaranteed the stable of reference system, therefore improved accuracy of detection, and avoided the loaded down with trivial details verification to detecting electrode.
Further, also be set with electrode shield in described glass electrode lower housing portion, the upper end of described electrode shield and the lower end of described sensor housing are tightly connected, be provided with O-ring seal between the top of described sensor housing and the described glass electrode housing, be provided with lower seal between described electrode shield and the described glass electrode housing.
Adopt the beneficial effect of above-mentioned further scheme to be, electrode shield has effectively been protected the glass ball bulb of glass electrode, adopts upper and lower O-ring seal can guarantee that the additional liquid in the toroidal cavity do not reveal.
Further, described sensor housing is provided with the pressurising hole that communicates with described toroidal cavity, also is provided with the stifled jackscrew that reaches of plug on the described pressurising hole.
Adopt the beneficial effect of above-mentioned further scheme to be, adopt the pressurising hole can be in the fluid infusion cover in good time supplementary pressure during the pressure step-down, further guarantee the stable of reference solution, significantly improve the serviceable life of sensor.
Further, the pressure of described pressure gas is 0.1MPa~0.8MPa.
Adopt the beneficial effect of above-mentioned further scheme to be, can the pressure of needs be set according to different measuring media, different working environments, so that between sensor serviceable life and measuring accuracy, reach best configuration.
Further, the upper end of described sensor housing is provided with socket and plug, the side of described sensor housing is provided with through wires hole, described conductance electrode, temperature element are respectively by lead-in wire, and make described lead-in wire pass described through wires hole to be electrically connected with described plug, be provided with working electrode and contrast electrode in the described glass electrode housing, described working electrode and contrast electrode also are electrically connected with described plug by lead-in wire.
Adopt the beneficial effect of above-mentioned further scheme to be, adopt the plugs and sockets syndeton so that signal electrical connection standard is reliable, and be convenient to on-the-spot mounting or dismounting.
Further, the top of described sensor housing is provided with the connecting pipe screw thread.
Adopt the beneficial effect of above-mentioned further scheme to be, adopt the connecting pipe screw thread to make things convenient for the scene of sensor to install.
Description of drawings
Fig. 1 is one-piece construction schematic diagram of the present utility model;
Fig. 2 is the B position partial enlarged drawing of Fig. 1;
Fig. 3 is that the A-A of Fig. 1 is to cut-open view.
In Fig. 3, the represented component names of each label is as follows at Fig. 1:
1, plug, 1-1, contact pin, 2, socket, 3, first groups of lead-in wires, 4, upper O-ring seal, 5, through wires hole, 6, sensor housing, 7, the glass electrode housing, 7-1, glass ball bulb, 8, the fluid infusion hole, the 9, first conductance electrode, 10, insulator, 11, the second conductance electrode, 12, electrode shield, 13, lower seal, 14, salt bridge, 15, temperature element, 16, the pressurising hole, 17, plug is stifled, 18, jackscrew, 19, replenish liquid, 20, pressure gas, 21, second groups of lead-in wires.
Embodiment
Below in conjunction with accompanying drawing principle of the present utility model and feature are described, institute gives an actual example and only is used for explaining the utility model, is not be used to limiting scope of the present utility model.
Arrive shown in Figure 3 such as Fig. 1, a kind of pH value, conductivity and temperature multi-parameter sensor, comprise sensor housing 6 and glass electrode housing 7, it is characterized in that, described glass electrode housing 7 is sleeved in the described sensor housing 6, also is respectively equipped with on described sensor housing 6 for conductance measurement assembly and the temperature element 15 of measuring the conductivity parameter.
Described conductance measurement assembly comprises the first conductance electrode 9, insulator 10 and the second conductance electrode 11 that is sleeved on successively on the described sensor housing 6, and described temperature element 15 is for being embedded in the platinum resistance on the described sensor housing 6.
Described temperature element 15 is embedded on the sensor housing 6 of described conductance electrode inner side.
Be provided with toroidal cavity between described sensor housing 6 and the glass electrode housing 7, charge additional liquid 19 and pressure gas 20 in the described toroidal cavity, be provided with the fluid infusion hole 8 that is communicated with described toroidal cavity and described glass electrode housing 7 inside at described glass electrode housing 7.
Also be set with electrode shield 12 in described glass electrode housing 7 bottoms, the lower end of the upper end of described electrode shield 12 and described sensor housing 6 is tightly connected, be provided with O-ring seal 4 between the top of described sensor housing 6 and the described glass electrode housing 7, be provided with lower seal 13 between described electrode shield 12 and the described glass electrode housing 7.
Described sensor housing 6 is provided with the pressurising hole 16 that communicates with described toroidal cavity, also is provided with plug stifled 17 and jackscrew 18 on the described pressurising hole 16.
The pressure of described pressure gas 20 is 0.1MPa~0.8MPa.
The upper end of described sensor housing 6 is provided with socket 2 and plug 1, the side of described sensor housing 6 is provided with through wires hole 5, described conductance electrode, temperature element 15 are respectively by second group of lead-in wire 21, and make described second group of lead-in wire 21 pass described through wires hole 5 to be connected with contact pin 1-1 on the described plug 1, be provided with working electrode and contrast electrode in the described glass electrode housing 7, described working electrode and contrast electrode are connected with contact pin 1-1 on the described plug 1 by first group of lead-in wire 3.In order to guarantee to be electrically connected reliably, adopt the way encapsulation of infusion epoxy resin in the lead outlet of plug 1.
The top of described sensor housing 6 is provided with the connecting pipe screw thread.
The utility model in use, the contact pin 1-1 of described plug is connected with the input circuit of transmitter, solution to be measured is put in glass electrode housing 7 bottoms, and so that glass ball bulb 7-2, salt bridge 14, conductance electrode immerse in the solution to be measured together, can enter normal measuring state.
The above only is preferred embodiment of the present utility model, and is in order to limit the utility model, not all within spirit of the present utility model and principle, any modification of doing, is equal to replacement, improvement etc., all should be included within the protection domain of the present utility model.

Claims (9)

1. a pH value, conductivity and temperature multi-parameter sensor, comprise sensor housing and glass electrode housing, it is characterized in that, described glass electrode housing is sleeved in the described sensor housing, also is respectively equipped with on described sensor housing for conductance measurement assembly and the temperature element of measuring the conductivity parameter.
2. pH value according to claim 1, conductivity and temperature multi-parameter sensor, it is characterized in that, described conductance measurement assembly comprises the first conductance electrode, insulator and the second conductance electrode that is sleeved on successively on the described sensor housing, and described temperature element is the platinum resistance that is embedded on the described sensor housing.
3. pH value according to claim 1 and 2, conductivity and temperature multi-parameter sensor is characterized in that, described temperature element is embedded on the sensor housing of described conductance electrode inner side.
4. pH value according to claim 1 and 2, conductivity and temperature multi-parameter sensor, it is characterized in that, be provided with toroidal cavity between described sensor housing and the glass electrode housing, charge additional liquid and pressure gas in the described toroidal cavity, be provided with the fluid infusion hole that is communicated with described toroidal cavity and described glass electrode enclosure interior at described glass electrode housing.
5. pH value according to claim 4, conductivity and temperature multi-parameter sensor, it is characterized in that, also be set with electrode shield in described glass electrode lower housing portion, the upper end of described electrode shield and the lower end of described sensor housing are tightly connected, be provided with O-ring seal between the top of described sensor housing and the described glass electrode housing, be provided with lower seal between described electrode shield and the described glass electrode housing.
6. pH value according to claim 5, conductivity and temperature multi-parameter sensor is characterized in that, described sensor housing is provided with the pressurising hole that communicates with described toroidal cavity, also are provided with the stifled jackscrew that reaches of plug on the described pressurising hole.
7. pH value according to claim 6, conductivity and temperature multi-parameter sensor is characterized in that, the pressure of described pressure gas is 0.1MPa~0.8MPa.
8. pH value according to claim 7, conductivity and temperature multi-parameter sensor, it is characterized in that, the upper end of described sensor housing is provided with socket and plug, the side of described sensor housing is provided with through wires hole, described conductance electrode, temperature element are respectively by lead-in wire, and make described lead-in wire pass described through wires hole to be electrically connected with described plug, to be provided with working electrode and contrast electrode in the described glass electrode housing, described working electrode and contrast electrode also are electrically connected with described plug by lead-in wire.
9. pH value according to claim 8, conductivity and temperature multi-parameter sensor is characterized in that, the top of described sensor housing is provided with the connecting pipe screw thread.
CN 201220504924 2012-09-28 2012-09-28 Multi-parameter sensor for measuring pH (potential of hydrogen) value, conductivity and temperature Active CN202770804U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
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Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102879450A (en) * 2012-09-28 2013-01-16 招远市大明仪表有限公司 Multi-parameter sensor for pH, conductivity and temperature

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102879450A (en) * 2012-09-28 2013-01-16 招远市大明仪表有限公司 Multi-parameter sensor for pH, conductivity and temperature
CN102879450B (en) * 2012-09-28 2015-09-16 招远市大明仪表有限公司 A kind of pH value, conductivity and temperature multi-parameter sensor

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