CN2301723Y - Replaceable gas sensor - Google Patents
Replaceable gas sensor Download PDFInfo
- Publication number
- CN2301723Y CN2301723Y CN 96208520 CN96208520U CN2301723Y CN 2301723 Y CN2301723 Y CN 2301723Y CN 96208520 CN96208520 CN 96208520 CN 96208520 U CN96208520 U CN 96208520U CN 2301723 Y CN2301723 Y CN 2301723Y
- Authority
- CN
- China
- Prior art keywords
- gas sensor
- resistor
- sensor
- gas
- resistance
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Investigating Or Analyzing Materials By The Use Of Fluid Adsorption Or Reactions (AREA)
Abstract
The utility model relates to a replaceable gas sensor, which comprises a resistance type gas sensor of a general semiconductor. A load resistor R< L > which is configured according to the resistance and sensitivity of every gas sensitive element, and the voltages value which is desired to put out under the condition of specific gas concentration is connected with a resistor R< X > for gas sensitive elements in series, the intersection point of the load resistor R< L > and the resistor R< X > is used as an output end V< O > of the sensor, the other end of the load resistor R< L > and the other end of the resistor R< X > are respectively used as the lead-in for the earth contact of the sensor and the lead-in of an operating voltage V< C >, and the load resistor R< L > is sealed with the gas sensor into a whole. The gas sensor has the advantages of replaceable property, and convenient production, use and maintenance.
Description
The utility model relates to gas sensor, the replaceable gas sensor of particularly exportable constant voltage signal.
In industrial circles such as metallurgy, chemical industry, oil, traffic, semiconductor resistor formula gas sensor is widely used in gas-monitoring, concentration control, leakage alarm etc., is the ideal probe of these detectors, alarm.Existing such gas sensor in use in order to obtain output signal, needs at the outside of gas sensor serial connection pull-up resistor usually.Especially some gas-monitoring alarms often require to send alerting signal under the regulation gas concentration.But because the isoparametric discreteness of resistance, sensitivity of gas sensor is very big, when the pull-up resistor of being connected adopted fixed resistance, then the alarm set point of each monitoring alarm just was difficult to reach consistent, and then departed from setting so that misoperation occurs.For solving this contradiction, existing conventional method all is to adopt tunable load resistance, but this has not only increased the debugging work load in the production run, increased cost, more inconvenient is, when gas sensor damages, because of the user lacks necessary knowledge and correcting device, and can't change voluntarily, thereby bring difficulty for the maintenance of monitoring alarm.
The purpose of this utility model be to provide a kind of under the regulation gas concentration the replaceable gas sensor of exportable constant voltage signal.
The purpose of this utility model is achieved in that resistance, the sensitivity according to each gas sensor and requires the size of output voltage signal under the regulation gas concentration, determines corresponding pull-up resistor R
LAfter, with this pull-up resistor R
LWith the gas sensor resistance R
XBe in series R
LWith R
XJoining as the output end vo of sensor, R
LWith R
XThe other end respectively as the leading-in end of sensor ground connection and operating voltage Vc, then gas sensor and pull-up resistor are packaged as a whole, can constitute one does not need the yet replaceable gas sensor of exportable constant voltage of external load resistance.And pull-up resistor R
LDetermine, as long as then record the resistance R of gas sensor under certain regulation gas concentration
X, according to the sensor output voltage Vo that stipulates under this gas concentration, promptly available Ohm law is calculated required pull-up resistor R again
L
The utility model is owing to accomplished that the gas sensor that mass-produces has identical output voltage under the regulation gas concentration, thereby need not to carry out complicated loaded down with trivial details machine debugging when using, especially can be when the maintenance complete machine as changing bad bulb, the gas sensor dial-out that arbitrarily will damage is changed new, need not special maintenance technique, need not adjust, its monitoring alarm performance is still constant.Thereby the utlity model has replaceability, characteristics easy to maintenance, and help various watch-dog large-scale productions and after sale service, reduce cost, increase economic efficiency.
Below in conjunction with drawings and Examples the utility model is described in further detail.
Accompanying drawing is an electrical schematic diagram of the present utility model.
Among the figure, be existing general semiconductor resistance-type gas sensor, R in the empty frame
XBe the resistance of gas sensor, will be according to the resistance of each gas sensor, sensitivity and the pull-up resistor R that under the regulation gas concentration, requires the size of output voltage to dispose
LWith R
XBe in series R
LWith R
XJoining as the output end vo of sensor, R
LWith R
XThe other end respectively as the leading-in end of sensor ground connection and operating voltage Vc, then with R
LWith R
XBe packaged as a whole, can constitute one does not need the yet replaceable gas sensor of exportable constant voltage of external load resistance.Pull-up resistor is according to R
L=(VoRx)/(Vc-Vo) calculate.
For example the replaceable butane gas sensor of making by this method can have following performance index: 1, when air contained butane concentration and is 300PPm, sensor output voltage was 1.5 volts; 2, when air contained butane concentration and is 1000PPm, sensor output voltage was 2 volts; 3, the error of output voltages at different levels≤± 10%.
Claims (1)
- A kind of replaceable gas sensor, it comprises a general semiconductor resistance-type gas sensor, it is characterized in that the pull-up resistor R with configuration LWith the gas sensor resistance R XBe in series R LWith R XJoining as the output end vo of sensor, R LWith R XThe other end respectively as the leading-in end of sensor ground connection and operating voltage Vc, pull-up resistor R LAs a whole with the gas sensor encapsulation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96208520 CN2301723Y (en) | 1996-04-12 | 1996-04-12 | Replaceable gas sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96208520 CN2301723Y (en) | 1996-04-12 | 1996-04-12 | Replaceable gas sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2301723Y true CN2301723Y (en) | 1998-12-23 |
Family
ID=33892493
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 96208520 Expired - Fee Related CN2301723Y (en) | 1996-04-12 | 1996-04-12 | Replaceable gas sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2301723Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9689827B2 (en) | 2013-10-09 | 2017-06-27 | Honeywell International Inc. | Potentiostatic circuits for electrochemical sensors |
| CN110455869A (en) * | 2018-05-07 | 2019-11-15 | 中国石油化工股份有限公司 | The gas sensing monitoring probe and its application of included sampling resistor |
-
1996
- 1996-04-12 CN CN 96208520 patent/CN2301723Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9689827B2 (en) | 2013-10-09 | 2017-06-27 | Honeywell International Inc. | Potentiostatic circuits for electrochemical sensors |
| CN104569086B (en) * | 2013-10-09 | 2018-04-06 | 霍尼韦尔国际公司 | Potentiostatic circuit for electrochemical sensor |
| CN110455869A (en) * | 2018-05-07 | 2019-11-15 | 中国石油化工股份有限公司 | The gas sensing monitoring probe and its application of included sampling resistor |
| CN110455869B (en) * | 2018-05-07 | 2023-07-25 | 中国石油化工股份有限公司 | Gas-sensitive sensing monitoring probe with sampling resistor and application thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |