CN2627505Y - Poisonous gas transducer - Google Patents
Poisonous gas transducer Download PDFInfo
- Publication number
- CN2627505Y CN2627505Y CN 03260264 CN03260264U CN2627505Y CN 2627505 Y CN2627505 Y CN 2627505Y CN 03260264 CN03260264 CN 03260264 CN 03260264 U CN03260264 U CN 03260264U CN 2627505 Y CN2627505 Y CN 2627505Y
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Abstract
The utility model provides a poisonous gas transmitter which is a transmitter capable of real-time detection of the concentration of poisonous gas in the dangerous work environment. A sensor (2) and a signal control circuit board (3) are both arranged inside an explosion-proof shell (1). A grate electrode of a field effect transistor (Q1) is connected with a power supply (+Ec), a source electrode of the field effect transistor (Q1) is connected with a reference electrode (A1) of the sensor (2), and a drain electrode of the field effect transistor (Q1) is connected with a sensitive electrode (A2) of the sensor (2). A reversed phase input terminal of an operational amplifier (M1) is connected with the sensitive electrode (A2) of the sensor (2) by a resistor (R1), and a reversed phase output terminal of the operational amplifier (M1) is connected with pins of a signal output and insert row (E1) of the operational amplifier (M1). A resistor (R4) is connected with a resistor (R6) and the negative electrode of a voltage-stabilizing tube (DW1). With the addition of the automatic identification circuit of the electrochemical sensor, the utility model can automatically convert the sensor parameters according to the types of electrochemical sensors. Additionally, the utility model has advantages reduced routine maintenance, standardized workload, easy operation and improved reliability.
Description
Technical field: the utility model relates to a kind of transmitter that can detect dangerous work environment toxic gas concentration in real time.
Background technology: present poisonous gas transmitter, the general sensor that adopts mainly contains two kinds: semiconductor-type sensor and electrochemical transducer[sensor.Wherein, the gas-selectively of semiconductor-type sensor is relatively poor, and temperature influence is bigger, the gas least concentration that detects is more than hundreds of PPM, so gas situation complexity at the scene, environmental change is bigger, under the demanding situation of accuracy of detection, can not satisfy the detection requirement.And the gas-selectively of electrochemical transducer[sensor is stronger, is subjected to temperature, humidity effect less, and the gas concentration of detection can reach 0.1PPM, but the life-span of electrochemical sensor is shorter, generally has only 2 years, and detects different types of poison gas and will use different sensors.Because the contour structures of the sensor of variety classes poisonous gas is identical with the mode of connection, just the gas that detects is not different to the sensitivity of gas simultaneously yet.Will adopt explosion-proof casing at the hazardous area gas transmitter, be very unsafe and open at the scene that explosion-proof casing demarcates.In present existing harmful gas detecting device, use semiconductor devices more as detecting element, but it can not reach the requirement of 1PPM measuring accuracy.And adopt electrochemical sensor few as detecting element, and in circuit design, only noted the subsequent treatment of signal, and do not handled in shortcomings such as the life-span that is directed to electrochemical sensor itself are short, sensitivity changes in time, replacing sensor is frequent.For example Chinese patent 98212325.6, and " carbon monoxide alarm ", it adopts hot-wire semiconductor sensitive element, and its cost is low, only suitable average family usefulness, but still exist precision lower, bigger shortcoming affected by environment.
The utility model content: the utility model has been developed a kind of reliability and practical poisonous gas transmitter, the utility model has significantly reduced the workload of daily servicing, demarcation, simple to operate, can conveniently adjust the sensitivity of electrochemical sensor, increased the reliability of transmitter.The utility model is made up of explosion-proof casing 1, sensor 2, signal control circuit plate 3, and sensor 2 and signal control circuit plate 3 are installed in the explosion-proof casing 1; Described sensor 2 is by reference utmost point A
1, responsive utmost point A
2, collector A
3, identification resistance R, K switch form; Described signal control circuit plate 3 is made up of 10G CPU Control Unit 3-1, sensor control panel 3-2; Described sensor control panel 3-2 is by electrochemical sensor automatic identification circuit 3-2-3, automatic memory circuit 3-2-2 of life-span, poison gas signal acquisition circuit 3-2-1, insert row E
1Form; Insert row E
11 pin meet power supply+Ec, insert row E
18 pin ground connection.Described poison gas signal acquisition circuit 3-2-1 is by six resistance R
1-R
6, three operational amplifier M
1-M
3, capacitor C
1, field effect transistor Q
1Form field effect transistor Q
1Grid meet power supply+Ec, field effect transistor Q
1Source electrode meet the reference utmost point A of sensor 2
1, field effect transistor Q
1Drain electrode meet the responsive utmost point A of sensor 2
2Operational amplifier M
1Inverting input through resistance R
1Meet the responsive utmost point A of sensor 2
2, operational amplifier M
1Inverting input through resistance R
3Meet operational amplifier M
1Signal output part and insert row E
12 pin; Operational amplifier M
1In-phase input end meet operational amplifier M
3Signal output part and inverting input, operational amplifier M
3In-phase input end connecting resistance R
5, R
4An end, resistance R
5Other end ground connection, resistance R
4Other end connecting resistance R
6An end and stabilivolt DW
1Negative pole, resistance R
6Another termination power+Ec, stabilivolt DW
1Plus earth; Operational amplifier M
2Signal output part meet the collector A of sensor 2
3, operational amplifier M
2In-phase input end meet operational amplifier M
3Signal output part, operational amplifier M
2Inverting input connecting resistance R
2An end and capacitor C
1An end, resistance R
2The reference utmost point A of another termination sensor 2
1, capacitor C
1Another termination operational amplifier M
2Signal output part; Described electrochemical sensor automatic identification circuit 3-2-3 is by two resistance R
7, R
8, operational amplifier M
4, the identification resistance R forms operational amplifier M
4In-phase input end connecting resistance R
7, R
8An end and sensor 2 in identification resistance R an end, identification resistance R the other end and resistance R
8Other end ground connection, resistance R
7Another termination power+Ec, operational amplifier M
4Inverting input meet operational amplifier M
4Signal output part and insert row E
13 pin; The described life-span, automatic memory circuit 3-2-2 was by clock chip IC
1, crystal oscillator X
1, electric battery BAT forms clock chip IC
1The positive pole of power supply termination electric battery BAT, the minus earth of electric battery BAT, clock chip IC
12,3 pin meet crystal oscillator X
1Two ends, clock chip IC
1Signal input part connect an end of the K switch of sensor 2, the other end of K switch patches row E
14 pin, clock chip IC
1Signal output part patch row E
15,6 pin.Principle of work: sensor control panel 3-2 and sensor 2 acquired signal are sent into 10G CPU Control Unit 3-1 after computing is amplified, by the voltage of 10G CPU Control Unit 3-1 according to identification resistance R in the different adjustment sensor of tested gas, and 10G CPU Control Unit 3-1 is according to clock chip IC
1Time, calculate service time of sensor, will regulate the size of output voltage when using automatically when surpassing certain time limit.The utility model reliability and practicality are all very high, add by identification resistance R and operational amplifier M in control circuit
4The electrochemical sensor automatic identification circuit of forming.According to the difference of the identification resistance R resistance on the different electrochemical sensors, when inserting the electrochemical sensor of gas with various, at operational amplifier M
4Output terminal produce different change in voltage, and output to CPU board, through the voltage-frequency conversion, CPU is according to the electrochemical sensor of the different automatic distinguishing gas with various of frequency.In sensor control panel 3-2, add by K switch and clock circuit IC
3Form automatic memory circuit of life-span, write down sensor service time automatically.After inserting electrochemical sensor, the K switch on the electrochemical sensor is with clock circuit IC in the control circuit
1Connect with 10G CPU Control Unit 3-1, year, month, day, the time of CPU pickup use at any time, 10G CPU Control Unit 3-1 changes the compensate for sensitivity of sensor automatically according to the time length that is write down, or points out more emat sensor.The beneficial effects of the utility model are: after 1, having increased the electrochemical sensor automatic identification circuit, when changing different types of gas sensor, CPU can be according to the difference of electrochemical sensor kind, parameter with sensor, as show conversions automatically such as gas type, digital enlargement factor, the value of setting of reporting to the police, make transmitter significantly reduce the workload of daily servicing, demarcation, operate very simply.2, increased electrochemical sensor life-span automatic identification circuit after, after service time of electrochemical sensor surpassing life cycle,, at regular intervals simultaneously, adjust the sensitivity of electrochemical sensor with the demonstration sign that exceeds the time limit, increased the reliability of transmitter.
Description of drawings: Fig. 1 is a structural representation of the present utility model, and Fig. 2 is the electrical block diagram of signal control circuit plate 3 and sensor 2 in the utility model.
Embodiment: this embodiment as shown in Figure 1, 2, it is made up of explosion-proof casing 1, sensor 2, signal control circuit plate 3, sensor 2 and signal control circuit plate 3 are installed in the explosion-proof casing 1; Described sensor 2 is by reference utmost point A
1, responsive utmost point A
2, collector A
3, identification resistance R, K switch form; Described signal control circuit plate 3 is made up of 10G CPU Control Unit 3-1, sensor control panel 3-2; Described sensor control panel 3-2 is by electrochemical sensor automatic identification circuit 3-2-3, automatic memory circuit 3-2-2 of life-span, poison gas signal acquisition circuit 3-2-1, insert row E
1Form; Insert row E
11 pin meet power supply+Ec, insert row E
18 pin ground connection.Described poison gas signal acquisition circuit 3-2-1 is by six resistance R
1-R
6, three operational amplifier M
1-M
3, capacitor C
1, field effect transistor Q
1Form field effect transistor Q
1Grid meet power supply+Ec, field effect transistor Q
1Source electrode meet the reference utmost point A of sensor 2
1, field effect transistor Q
1Drain electrode meet the responsive utmost point A of sensor 2
2Operational amplifier M
1Inverting input 2 pin through resistance R
1Meet the responsive utmost point A of sensor 2
2, operational amplifier M
1Inverting input 2 pin through resistance R
3Meet operational amplifier M
1Signal output part 1 pin and insert row E
12 pin; Operational amplifier M
1In-phase input end 3 pin meet operational amplifier M
3Signal output part 1 pin and inverting input 2 pin, operational amplifier M
3In-phase input end 3 pin connecting resistance R
5, R
4An end, resistance R
5Other end ground connection, resistance R
4Other end connecting resistance R
6An end and stabilivolt DW
1Negative pole, resistance R
6Another termination power+Ec, stabilivolt DW
1Plus earth; Operational amplifier M
2Signal output part 7 pin meet the collector A of sensor 2
3, operational amplifier M
2In-phase input end 5 pin meet operational amplifier M
3Signal output part 1 pin, operational amplifier M
2Inverting input 6 pin connecting resistance R
2An end and capacitor C
1An end, resistance R
2The reference utmost point A of another termination sensor 2
1, capacitor C
1Another termination operational amplifier M
2Signal output part 7 pin; Described electrochemical sensor automatic identification circuit 3-2-3 is by two resistance R
7, R
8, operational amplifier M
4, the identification resistance R forms operational amplifier M
4In-phase input end 5 pin connecting resistance R
7, R
8An end and sensor 2 in identification resistance R an end, identification resistance R the other end and resistance R
8Other end ground connection, resistance R
7Another termination power+Ec, operational amplifier M
4Inverting input 6 pin meet operational amplifier M
4Signal output part 7 pin and insert row E
13 pin; The described life-span, automatic memory circuit 3-2-2 was by clock chip IC
1, crystal oscillator X
1, electric battery BAT forms clock chip IC
1Select the DS1302 model for use, clock chip IC
1Power end 1 pin connect the positive pole of electric battery BAT, the minus earth of electric battery BAT, clock chip IC
12,3 pin meet crystal oscillator X
1Two ends, clock chip IC
1Signal input part 7 pin connect an end of the K switch of sensor 2, the other end of K switch patches row E
14 pin, clock chip IC
1Signal output part patch row E
15,6 pin, clock chip IC
14,8 pin ground connection.Described 10G CPU Control Unit is by 3-1 single-chip microcomputer IC
3, electric current and voltage conversion chip IC
2, two voltage chip IC
5, IC
6, chip IC resets
4, 13 resistance R
9-R
21, 11 capacitor C
2-C
12, field effect transistor Q
2, resistance row RD, LCD display devices, crystal oscillator X
2, three K switch
1-K
3, diode D
1, socket E
2Form single-chip microcomputer IC
3Select the 97C2051 model for use, electric current and voltage conversion chip IC
2Select the XTR110 model for use, the voltage chip IC
5, IC
6Select the LM331 model for use, chip IC resets
4Select the X25045 model for use, single-chip microcomputer IC
31 pin connect the chip IC that resets
47 pin and resistance R
17An end, resistance R
17Other end ground connection, chip IC resets
44 pin ground connection, chip IC resets
43 pin, 8 pin meet power supply+Ec, chip IC resets
48 foot meridian capacitor C
9Ground connection, chip IC resets
41,2,5,6 pin and single-chip microcomputer IC
319,18,16,17 pin one by one correspondence be connected; Single-chip microcomputer IC
32 pin combination hub E
25 pin; Single-chip microcomputer IC
33 pin combination hub E
24 pin; Single-chip microcomputer IC
34,5 pin meet crystal oscillator X respectively
2Two ends, single-chip microcomputer IC
34,5 pin respectively through capacitor C
10, C
11Ground connection; Single-chip microcomputer IC
36 pin connect the voltage chip IC
5Signal output part 3 pin, the voltage chip IC
54 pin ground connection, the voltage chip IC
52 pin through resistance R
13Ground connection, the voltage chip IC
58 pin meet power supply+Ec, the voltage chip IC
51 pin connect the voltage chip IC
56 pin, capacitor C
5An end and resistance R
12An end, resistance R
12The other end and capacitor C
5Other end ground connection, the voltage chip IC
55 pin connect capacitor C
6An end and resistance R
21An end, capacitor C
6Other end ground connection, resistance R
21Another termination power+Ec, the voltage chip IC
5Signal input part 7 pin combination hub E
22 pin; Single-chip microcomputer IC
37 pin connect the voltage chip IC
6Signal output part 3 pin, the voltage chip IC
64 pin ground connection, the voltage chip IC
62 pin through resistance R
14Ground connection, the voltage chip IC
58 pin meet power supply+Ec, the voltage chip IC
61 pin connect the voltage chip IC
66 pin, capacitor C
7An end and resistance R
16An end, resistance R
16The other end and capacitor C
7Other end ground connection, the voltage chip IC
65 pin connect capacitor C
8An end and resistance R
15An end, capacitor C
8Other end ground connection, resistance R
15Another termination power+Ec, the voltage chip IC
6Signal input part 7 pin combination hub E
23 pin, socket E
28 pin meet power supply+Ec, socket E
21 pin ground connection; Single-chip microcomputer IC
38,9,11 connect K switch respectively
3, K
2, K
1Movable contact, K switch
3, K
2, K
1Fixed juncture ground connection all, single-chip microcomputer IC
38,9,11 respectively through resistance R
18, R
19, R
20Meet power supply+Ec; Single-chip microcomputer IC
310 pin ground connection; Single-chip microcomputer IC
3Signal output part 12,13 pin connect the signal input part of LCD display devices; Single-chip microcomputer IC
314 pin combination hub E
26 pin; Single-chip microcomputer IC
315 pin connect capacitor C
4An end and resistance R
11An end, resistance R
11Other end connecting resistance R
10An end and capacitor C
3An end, capacitor C
3, C
4Other end ground connection, resistance R
10Another termination electric current and voltage conversion chip IC
2Signal input part 5 pin, electric current and voltage conversion chip IC
2Power end 16 pin meet power supply+Ec, electric current and voltage conversion chip IC
22 pin ground connection, electric current and voltage conversion chip IC
23,4 pin through resistance R
9Meet electric current and voltage conversion chip IC
28 pin, electric current and voltage conversion chip IC
21,13 pin meet field effect transistor Q
2Drain electrode, field effect transistor Q
2Grid meet electric current and voltage conversion chip IC
214 pin, field effect transistor Q
2Source electrode meets diode D
1Positive pole, diode D
1Negative pole meet power supply+V; Single-chip microcomputer IC
3Power end 20 pin connect power supply+Ec and capacitor C
12An end, capacitor C
12Other end ground connection; Single-chip microcomputer IC
312,13,14,15,16,17,18,19 pin and corresponding one by one being connected of 8,7,6,5,4,3,2,1 pin of resistance row RD, 9,10,11,12,13,14,15,16 pin of resistance row RD all meet power supply+Ec.During use with insert row E
1With socket E
2Peg graft mutually and get final product.
Claims (2)
1, poisonous gas transmitter, it is made up of explosion-proof casing (1), sensor (2), signal control circuit plate (3), and sensor (2) and signal control circuit plate (3) are installed in the explosion-proof casing (1); Described sensor (2) is by the reference utmost point (A
1), the responsive utmost point (A
2), collector (A
3), identification resistance (R), switch (K) form; Described signal control circuit plate (3) is made up of 10G CPU Control Unit (3-1), sensor control panel (3-2); It is characterized in that described sensor control panel (3-2) is by electrochemical sensor automatic identification circuit (3-2-3), automatic memory circuit of life-span (3-2-2), poison gas signal acquisition circuit (3-2-1), insert row (E)
1Form; Insert row (E
1) (1) pin connect power supply (+Ec), insert row (E
1) (8) pin ground connection; Described poison gas signal acquisition circuit (3-2-1) is by six resistance (R
1)-(R
6), three operational amplifier (M
1)-(M
3), electric capacity (C
1), field effect transistor (Q
1) form field effect transistor (Q
1) grid connect power supply (+Ec), field effect transistor (Q
1) source electrode meet the reference utmost point (A of sensor (2)
1), field effect transistor (Q
1) drain electrode meet the responsive utmost point (A of sensor (2)
2); Operational amplifier (M
1) inverting input through resistance (R
1) meet the responsive utmost point (A of sensor (2)
2), operational amplifier (M
1) inverting input through resistance (R
3) meet operational amplifier (M
1) signal output part and insert row (E
1) (2) pin; Operational amplifier (M
1) in-phase input end meet operational amplifier (M
3) signal output part and inverting input, operational amplifier (M
3) in-phase input end connecting resistance (R
5), (R
4) an end, resistance (R
5) other end ground connection, resistance (R
4) other end connecting resistance (R
6) an end and stabilivolt (DW
1) negative pole, resistance (R
6) another termination power (+Ec), stabilivolt (DW
1) plus earth; Operational amplifier (M
2) signal output part meet the collector (A of sensor (2)
3), operational amplifier (M
2) in-phase input end meet operational amplifier (M
3) signal output part, operational amplifier (M
2) inverting input connecting resistance (R
2) an end and electric capacity (C
1) an end, resistance (R
2) the reference utmost point (A of another termination sensor (2)
1), electric capacity (C
1) another termination operational amplifier (M
2) signal output part; Described electrochemical sensor automatic identification circuit (3-2-3) is by two resistance (R
7), (R
8), operational amplifier (M
4), identification resistance (R) forms operational amplifier (M
4) in-phase input end connecting resistance (R
7), (R
8) an end and sensor (2) in identification resistance (R) an end, identification resistance (R) the other end and resistance (R
8) other end ground connection, resistance (R
7) another termination power (+Ec), operational amplifier (M
4) inverting input meet operational amplifier (M
4) signal output part and insert row (E
1) (3) pin; Automatic memory circuit of described life-span (3-2-2) is by clock chip (IC
1), crystal oscillator (X
1), electric battery (BAT) forms clock chip (IC
1) the positive pole of power supply termination electric battery (BAT), the minus earth of electric battery (BAT), clock chip (IC
1) (2), (3) pin meet crystal oscillator (X
1) two ends, clock chip (IC
1) signal input part connect an end of the switch (K) of sensor (2), the other end of switch (K) patches row (E
1) (4) pin, clock chip (IC
1) signal output part patch row (E
1) (5), (6) pin.
2, poisonous gas transmitter according to claim 1 is characterized in that described 10G CPU Control Unit is by (3-1) single-chip microcomputer (IC
3), electric current and voltage conversion chip (IC
2), two voltage chips (IC)
5, (IC
6), chip (IC resets
4), 13 resistance (R
9)-(R
21), 11 electric capacity (C
2)-(C
12), field effect transistor (Q
2), resistance row (RD), display device (LCD), crystal oscillator (X
2), three switch (K
1)-(K
3), diode (D
1), socket (E
2) form single-chip microcomputer (IC
3) (1) pin meet the chip (IC that resets
4) (7) pin and resistance (R
17) an end, resistance (R
17) other end ground connection, chip (IC resets
4) (4) pin ground connection, chip (IC resets
4) (3) pin, (8) pin connect power supply (+Ec), chip (IC resets
4) (8) foot meridian capacitor (C
9) ground connection, chip (IC resets
4) (1), (2), (5), (6) pin and single-chip microcomputer (IC
3) (19), (18), (16), (17) pin one by one correspondence be connected; Single-chip microcomputer (IC
3) (2) pin combination hub (E
2) (5) pin; Single-chip microcomputer (IC
3) (3) pin combination hub (E
2) (4) pin; Single-chip microcomputer (IC
3) (4), (5) pin meet crystal oscillator (X respectively
2) two ends, single-chip microcomputer (IC
3) (4), (5) pin respectively through electric capacity (C
10), (C
11) ground connection; Single-chip microcomputer (IC
3) (6) pin meet voltage chip (IC
5) signal output part (3) pin, voltage chip (IC
5) (4) pin ground connection, voltage chip (IC
5) (2) pin through resistance (R
13) ground connection, voltage chip (IC
5) (8) pin connect power supply (+Ec), voltage chip (IC
5) (1) pin meet voltage chip (IC
5) (6) pin, electric capacity (C
5) an end and resistance (R
12) an end, resistance (R
12) the other end and electric capacity (C
5) other end ground connection, voltage chip (IC
5) (5) pin meet electric capacity (C
6) an end and resistance (R
21) an end, electric capacity (C
6) other end ground connection, resistance (R
21) another termination power (+Ec), voltage chip (IC
5) signal input part (7) pin combination hub (E
2) (2) pin; Single-chip microcomputer (IC
3) (7) pin meet voltage chip (IC
6Signal output part (3) pin, voltage chip (IC
6(4 pin ground connection, voltage chip (IC
6) (2) pin through resistance (R
14) ground connection, voltage chip (IC
5) (8) pin connect power supply (+Ec), voltage chip (IC
6) (1) pin meet voltage chip (IC
6) (6) pin, electric capacity (C
7) an end and resistance (R
16) an end, resistance (R
16) the other end and electric capacity (C
7) other end ground connection, voltage chip (IC
6) (5) pin meet electric capacity (C
8) an end and resistance (R
15) an end, electric capacity (C
8) other end ground connection, resistance (R
15) another termination power (+Ec), voltage chip (IC
6) signal input part (7) pin combination hub (E
2) (3) pin, socket (E
2) (8) pin connect power supply (+Ec), socket (E
2) (1) pin ground connection; Single-chip microcomputer (IC
3) (8), (9), (11) meet switch (K respectively
3), (K
2), (K
1) movable contact, switch (K
3), (K
2), (K
1) fixed juncture ground connection all, single-chip microcomputer (IC
3) (8), (9), (11) respectively through resistance (R
18), (R
19), (R
2) connect power supply (+Ec); Single-chip microcomputer (IC
3) (10) pin ground connection; Single-chip microcomputer (IC
3) signal output part (12), the signal input part that (13) pin meets display device (LCD); Single-chip microcomputer (IC
3) (14) pin combination hub (E
2) (6) pin; Single-chip microcomputer (IC
3) (15) pin meet electric capacity (C
4) an end and resistance (R
11) an end, resistance (R
11) other end connecting resistance (R
10) an end and electric capacity (C
3) an end, electric capacity (C
3), (C
4) other end ground connection, resistance (R
10) another termination electric current and voltage conversion chip (IC
2) signal input part (5) pin, electric current and voltage conversion chip (IC
2) power end (16) pin connect power supply (+Ec), electric current and voltage conversion chip (IC
2) (2) pin ground connection, electric current and voltage conversion chip (IC
2) (3), (4) pin through resistance (R
9) meet electric current and voltage conversion chip (IC
2) (8) pin, electric current and voltage conversion chip (IC
2) (1), (13) pin meet field effect transistor (Q
2) drain electrode, field effect transistor (Q
2) grid meet electric current and voltage conversion chip (IC
2) (14) pin, field effect transistor (Q
2) source electrode meets diode (D
1) positive pole, diode (D
1) negative pole connect power supply (+V); Single-chip microcomputer (IC
3) power end (20) pin meet power supply (+Ec and electric capacity (C
12An end, electric capacity (C
12) other end ground connection; Single-chip microcomputer (IC
3) (12), (13), (14), (15), (16), (17), (18), (19) pin and resistance row (RD) (8), (7), (6), (5), (4, (3, (2), (1) pin is corresponding one by one is connected, (9), (10), (11), (12), (13), (14), (15), (16) pin of resistance row (RD) all connect power supply (+Ec).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03260264 CN2627505Y (en) | 2003-07-14 | 2003-07-14 | Poisonous gas transducer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03260264 CN2627505Y (en) | 2003-07-14 | 2003-07-14 | Poisonous gas transducer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2627505Y true CN2627505Y (en) | 2004-07-21 |
Family
ID=34255042
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03260264 Expired - Fee Related CN2627505Y (en) | 2003-07-14 | 2003-07-14 | Poisonous gas transducer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2627505Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110161937A (en) * | 2019-06-20 | 2019-08-23 | 应急管理部四川消防研究所 | Electrochemical sensor automatic identifying method |
-
2003
- 2003-07-14 CN CN 03260264 patent/CN2627505Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110161937A (en) * | 2019-06-20 | 2019-08-23 | 应急管理部四川消防研究所 | Electrochemical sensor automatic identifying method |
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