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      Zhengzhou Winsen Electronics Technology Co., Ltd                         

www.winsen-sensor.com

                                    

 

 

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

[email protected]

 

 

only result in corrosion of sensors structure, also it cause sincere sensitivity attenuation.   

1.3 Alkali, Alkali metals salt, halogen pollution 

The sensors performance will be changed badly if sensors be sprayed polluted by alkali metals salt especially 
brine, or be exposed to halogen such as fluorine.     

1.4 Touch water 
      Sensitivity of the sensors will be reduced when spattered or dipped in water.                                       

1.5 Freezing 

 

Do avoid icing on sensor’s surface, otherwise sensing material will be broken and lost sensitivity.           

 

1.6 Applied voltage 

Applied voltage on sensor should not be higher than 120mW, it will cause irreversible heater damaged, also 
hurt from static, so anti-static precautions should be taken when touching sensors. 

2 .Following conditions must be avoided 

2.1 Water Condensation   

  Indoor  conditions,  slight  water  condensation  will  influence 

sensors’  performance  lightly.  However,  if  water 

condensation on sensors surface and keep a certain period, 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 will be affected. If lighter gas sprays the sensor, it will cause extremely damage.   

                                               

2.3 Long time exposed to extreme environment 

  No  matter  the  sensors  electrified  or  not,  if  exposed  to  adverse  environment  for  long  time,  such  as  high 

humidity, high temperature, or high pollution etc., it will influence 

the sensors’ performance badly. 

 

2.4 Vibration 

Continual vibration will result in sensors down-lead response then break. In transportation or assembling line, 
pneumatic screwdriver/ultrasonic welding machine can lead this vibration.   

2.5 Concussion   
      If sensors meet strong concussion, it may lead its lead wire disconnected.   
2.6 Soldering 
      Soldering flux: Rosin soldering flux contains least chlorine and safeguard procedures. 
 
If disobey the above using terms, sensors sensitivity will be reduced. 

 

Zhengzhou  Winsen  Electronics  Technology 
Co., Ltd 
Add:

 No.299, Jinsuo Road, National Hi-Tech 

Zone, Zhengzhou 450001 China 

Tel:

 +86-371-67169097/67169670 

Fax:

 +86-371-60932988 

E-mail:

 

 

[email protected]

 

Website: 

www.winsen-sensor.com

 

Содержание GM-402B

Страница 1: ...y Co Ltd www winsen sensor com Tel 86 371 67169097 67169670 Fax 86 371 60932988 Email sales winsensor com MEMS Combustible Gas Sensor Model No GM 402B Manual Version 1 1 Valid from 2017 05 10 Zhengzho...

Страница 2: ...suse please read the manual carefully and operate it correctly in accordance with the instructions If users disobey the terms or remove disassemble change the components inside of the sensor we shall...

Страница 3: ...tible gases Small sizes and low power consumption Fast response and resume Simple drive circuit Long lifespan Application Gas leak detection for mobile phones computers and other consumer electronics...

Страница 4: ...B test circuit Instructions The above fig is the basic test circuit of GM 402B The sensor requires two voltage inputs heater voltage VH and circuit voltage VC VH is used to supply specific working tem...

Страница 5: ...4 Typical temperature humidity characteristics Rs means resistance of sensor in 5000ppm methane CH4 under different temp and humidity Rso means resistance of the sensor in 5000ppm methane under 20 55...

Страница 6: ...ases preheating time the relationship between input and output is not linear hysteretic and non repetitive For absolute concentration measurement they need regular calibration one point calibration mu...

Страница 7: ...sensors surface and keep a certain period 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 f...

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