CN203232334U - Constant temperature protective device of electrochemical sensor - Google Patents
Constant temperature protective device of electrochemical sensor Download PDFInfo
- Publication number
- CN203232334U CN203232334U CN 201320158841 CN201320158841U CN203232334U CN 203232334 U CN203232334 U CN 203232334U CN 201320158841 CN201320158841 CN 201320158841 CN 201320158841 U CN201320158841 U CN 201320158841U CN 203232334 U CN203232334 U CN 203232334U
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- electrochemical sensor
- constant temperature
- housing
- protective device
- gas
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Abstract
The utility model relates to a constant temperature protective device of an electrochemical sensor. The constant temperature protective device comprises a housing, a gas inlet pipe and an exhaust pipe communicating with the housing, and a resistance wire winding outside the housing, wherein the housing is a hollow body composed of a pedestal and a top cover in screw connection, an insulation cover is sleeved over the pedestal, a resistance wire winds outside the outer wall of the pedestal, a gas intake and a gas outlet are arranged in the pedestal, the gas inlet pipe winds outside the resistance wire and then communicates with the gas intake, and the exhaust pipe communicates with the gas outlet, and the outer ports of the gas inlet pipe and the exhaust pipe extend out of the insulation cover. The constant temperature protective device allows electrochemical sensors of a portable apparatus or on-line monitoring device to work under any gas temperature. The constant temperature measuring system of the electrochemical sensor has low requirements on work power, and current signals are converted by a circuit into 4-20mA standard signals for output, thereby allowing direct integration into a gas detection apparatus for data connection. The influence of temperature on the electrochemical sensor is eliminated, and the measuring precision is effectively improved.
Description
Technical field
The utility model relates to a kind of attemperator, relates in particular to a kind of constant temperature protective device of electrochemical sensor.
Background technology
Electrochemical sensor the earliest can be traced back to the 1950's, is used for oxygen monitoring at that time.To 20th century the mid-80s, the small electrical chemical sensor begins for detection of the multiple different toxic gases in the PEL scope, and has demonstrated good sensitivity and selectivity.At present, various electrochemical sensors are widely used in many on-line monitoring systems and Portable Measurement Instrument.
Typical electrochemical sensor is made up of sensing electrode and counter electrode, and is separated by a thin electrolyte layers.Gas at first reacts by the small perforate of hollow billet type and sensor, is the hydrophobic barrier then, finally arrives electrode surface.Sensing electrode can adopt oxidation mechanism or reduction mechanism.These reactions are carried out catalysis by the electrode material that designs at tested gas.By the resistor that connects between electrode, the electric current that is directly proportional with tested gas concentration can flow between positive pole and negative pole.Measure this electric current and can determine gas concentration.Because can produce electric current in this process, electrochemical sensor often is called as electric current gas sensor or micro fuel cell again.
Electrochemical sensor is very responsive to temperature, and generally speaking, when temperature was higher than 25 ° of C, sensor reading was higher; When being lower than 25 ° of C, reading is lower.Temperature effect is generally every degree centigrade 0.5% to 1.0%, decides on manufacturer and sensor type.Temperature can exert an influence to range and baseline output at zero point.
All be to adopt appearance to install heat-insulation layer additional simply to be incubated to this kind electrochemical sensor now, effect is undesirable.
Summary of the invention
The purpose of this utility model is to provide a kind of cost low, can be incubated electrochemical sensor, guarantees the constant temperature protective device of the electrochemical sensor of its steady operation.
The purpose of this utility model is achieved in that the constant temperature protective device of electrochemical sensor; comprise housing; the draft tube that is communicated with housing, gas outlet; be wrapped in the outer resistance wire of housing; the cavity body that housing is spun and formed by base and top cover; outside base, be with muff; base outer wall is wound with resistance wire; offer air intake opening and gas outlet in the base; draft tube is wrapped in resistance wire and is communicated with air intake opening more outward; gas outlet is communicated with the gas outlet, and draft tube and gas outlet external port are stretched out muff.
Because carry out technique scheme, the utility model is suitable for the job applications of electrochemical sensor under all gases environment temperature in portable instrument or the on-line monitoring equipment.The constant temperature measurement system of electrochemical sensor is less demanding to working power, current signal is the standard signal output of 4～20mA through processing of circuit, can directly be incorporated in the instrument and equipment that gas detects and carry out the data butt joint, eliminate the influence of temperature to electrochemical sensor to greatest extent, improved measuring accuracy effectively.
Description of drawings: the technical solution of the utility model is provided by following drawings and Examples:
Fig. 1 is the constant temperature protective device structural representation of electrochemical sensor.
Legend: 1, draft tube, 2, muff, 3, electrochemical sensor, 4, circuit board, 5, top cover, 6, the circuit chamber, 7, incubation cavity, 8, base, 9, resistance wire, 10, gas outlet, 11, temperature-sensing probe.
Embodiment:
The utility model is not subjected to the restriction of following embodiment, can determine concrete embodiment according to the technical solution of the utility model and actual conditions.
Embodiment: as shown in Figure 1, the constant temperature protective device of electrochemical sensor comprises housing, and the draft tube 1 that is communicated with housing, gas outlet 10 are wrapped in the outer resistance wire 9 of housing.The cavity body that housing is spun and formed by base 8 and top cover 5, top cover 5 internal cavities are the circuit chamber, installing circuit board 4 in it, base 8 internal cavities are incubation cavity 7, installing electrochemical sensor 3 in it, outside base 8, be with muff 2, fill heat-preservation cotton in the muff 2, base 8 outer walls are wound with resistance wire 9, offer air intake opening and gas outlet in the base 8, draft tube 1 is wrapped in outside the resistance wire 9 and is communicated with air intake opening, and gas outlet 10 is communicated with the gas outlet.Draft tube 1 and gas outlet 10 external port are stretched out muff 2.Offer a through hole in base 8 bottom surfaces, the hole interpolation has temperature-sensing probe 11, and temperature-sensing probe 11 adopts the PT1000 platinum resistance, and its temperature-sensitive trueness error is no more than 0.5%.
During use, with resistance wire 9 energising, thus to heating in the muff 2, and then will enter air heat in the draft tube 1, make that the air that enter in the incubation cavity 7 are hot-air.Can accurately know temperature in the incubation cavity 7 by temperature-sensing probe 11, thereby the air size of current changes the heat that resistance wire 9 produces, and regulates air themperature in the draft tube 1, changes temperature in the incubation cavity 7.
Above technical characterictic has constituted most preferred embodiment of the present utility model, and it has stronger adaptability and best implementation result, can increase and decrease inessential technical characterictic according to actual needs, satisfies the needs of different situations.
Claims (4)
1. the constant temperature protective device of an electrochemical sensor; comprise housing; the draft tube that is communicated with housing, gas outlet are wrapped in the outer resistance wire of housing, it is characterized in that: the cavity body that housing is spun and formed by base and top cover; outside base, be with muff; base outer wall is wound with resistance wire, offers air intake opening and gas outlet in the base, and draft tube is wrapped in resistance wire and is communicated with air intake opening more outward; gas outlet is communicated with the gas outlet, and draft tube and gas outlet external port are stretched out muff.
2. the constant temperature protective device of electrochemical sensor as claimed in claim 1, it is characterized in that: the top cover internal cavity is the circuit chamber, installing circuit board in it, the base internal cavity is incubation cavity, installing electrochemical sensor in it.
3. the constant temperature protective device of electrochemical sensor as claimed in claim 1 is characterized in that: fill heat-preservation cotton in the muff.
4. the constant temperature protective device of electrochemical sensor as claimed in claim 1, it is characterized in that: offer a through hole at base end face, the hole interpolation has temperature-sensing probe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320158841 CN203232334U (en) | 2013-04-02 | 2013-04-02 | Constant temperature protective device of electrochemical sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320158841 CN203232334U (en) | 2013-04-02 | 2013-04-02 | Constant temperature protective device of electrochemical sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203232334U true CN203232334U (en) | 2013-10-09 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320158841 Expired - Lifetime CN203232334U (en) | 2013-04-02 | 2013-04-02 | Constant temperature protective device of electrochemical sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203232334U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103235616A (en) * | 2013-04-02 | 2013-08-07 | 国家电网公司 | Thermostatic protector for electrochemical sensor |
| CN103728416A (en) * | 2013-11-20 | 2014-04-16 | 哈尔滨东方报警设备开发有限公司 | Gas sensor module capable of realizing automatic cooling or heating |
| CN110501665A (en) * | 2019-09-27 | 2019-11-26 | 广电计量检测（成都）有限公司 | A kind of comparison device of system for radiated susceptibility test equipment |
-
2013
- 2013-04-02 CN CN 201320158841 patent/CN203232334U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103235616A (en) * | 2013-04-02 | 2013-08-07 | 国家电网公司 | Thermostatic protector for electrochemical sensor |
| CN103728416A (en) * | 2013-11-20 | 2014-04-16 | 哈尔滨东方报警设备开发有限公司 | Gas sensor module capable of realizing automatic cooling or heating |
| CN110501665A (en) * | 2019-09-27 | 2019-11-26 | 广电计量检测（成都）有限公司 | A kind of comparison device of system for radiated susceptibility test equipment |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20131009 |
|
| CX01 | Expiry of patent term |