Winsen MQ135 Скачать руководство пользователя страница 4

 

Zhengzhou Winsen Electronics Technology Co., Ltd               

www.winsen-sensor.com

 

Tel: 86-371-67169097/67169670    Fax: 86-371-60932988                                Email: 

[email protected]

 

 

Basic Circuit 

 

 

 

 

 

 

 

 

 

 

Fig2. MQ135 Test Circuit 

Instructions: 

The  above  fig  is  the  basic  test  circuit  of  MQ135.The  sensor  requires  two  voltage  inputs: 

heater  voltage  (V

H

)  and  circuit  voltage(V

C

).  V

H

  is  used  to  supply  standard  working  temperature  to  the 

sensor and it can adopt DC or AC power, while V

RL

 is the voltage of load resistance R

which is in series with 

sensor. Vc supplies the detect voltage to load resistance R

L

 and it should adopts DC power.

 

Description of Sensor Characters

 

           

 

 

 

 

Fig3.Typical Sensitivity Curve

 

The  ordinate  is  resistance  ratio  of  the  sensor  (Rs/R

0

),  the 

abscissa is concentration of gases. Rs means resistance in 

target  gas  with  different  concentration,  R

means 

resistance  of  sensor  in  clean  air.  All  tests  are  finished 

under standard test conditions. 

 

Fig4.Typical temperature/humidity characteristics

 

The  ordinate  is  resistance  ratio  of  the  sensor  (Rs/Rso).Rs 

means  resistance  of  sensor  in  400ppm  H

2

  gas  under 

different  tem.  and  humidity.  Rso  means  resistance  of  the 

sensor in 400ppm H

2

 gas under 20

/55%RH. 

 

H

2

 

Air 
NH

3

 

Toluene 

Concentration (ppm) 

Содержание MQ135

Страница 1: ...Air Quality Gas Sensor Model MQ135 Manual Version 1 4 Valid from 2015 03 10 Zhengzhou Winsen Electronics Technology Co Ltd...

Страница 2: ...ance with the instructions If users disobey the terms or remove disassemble change the components inside of the sensor we shall not be responsible for the loss The specific such as color appearance si...

Страница 3: ...s in wide range and has advantages such as long lifespan low cost and simple drive circuit etc Main Applications It is widely used in domestic gas alarm industrial gas alarm and portable gas detector...

Страница 4: ...ensor Vc supplies the detect voltage to load resistance RL and it should adopts DC power Description of Sensor Characters Fig3 Typical Sensitivity Curve The ordinate is resistance ratio of the sensor...

Страница 5: ...osed to high concentration corrosive gas such as H2S SOX Cl2 HCl etc it will not only result in corrosion of sensors structure also it cause sincere sensitivity attenuation 1 3 Alkali Alkali metals sa...

Страница 6: ...eriod sensors sensitive will be decreased 2 2 Used in high gas concentration No matter the sensor is electrified or not if it is placed in high gas concentration for long time sensors characteristic w...

Страница 7: ...g the following conditions should be obey Soldering flux Rosin soldering flux contains least chlorine Speed 1 2 Meter Minute Warm up temperature 100 20 Welding temperature 250 10 One time pass wave cr...

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