GAS Sensor

INTRODUCTION TO GAS SENSOR

Features:

* High sensitivity to LPG, iso-butane, propane

* Small sensitivity to alcohol, smoke.

* Fast response.        

* Stable and long life        

* Simple drive circuit

Flex sensors are the sensors that change in resistance depending on the amount of bend on the sensor. They convert the change in bend to electrical resistance-the more the bend the more the resistance value. They are usually in the form of a thin strip from 1”=5” long that varies in resistance. They can be made uni-directional or bi-directional.

SPECIFICATIONS:

Standard work condition

Symbol	Parametername	Technical    condition	Remarks
Vc	Circuitvoltage	5V±0.1	AC OR DC
VH	Heatingvoltage	5V±0.1	ACOR DC
PL	Loadresistance	20KΩ
RH	Heaterresistance	33Ω±5%	Room Tem
PH	Heatingconsumption	less than 750mw

 Environment condition    

Symbol	Parameter name	Technical condition	Remarks
Tao	Using Tem	-10℃-50℃
Tas	Storage Tem	-20℃-70℃
RH	Related humidity	less than 95%Rh
O2	Oxygen concentration	21%(standardcondition)Oxygen concentration can affectsensitivity	minimum    value is over 2%

 

 Sensitivity characteristic

Symbol	Parameter name	Technical parameter	Remarks
Rs	Sensing    Resistance	10KΩ- 60KΩ (1000ppm LPG )	Detectingconcentrationscope： 200-10000ppmLPG , iso-butane,propane, LNG
α (1000ppm/ 4000ppm LPG)	Concentration slope    rate	≤0.6
Standard detectingcondition	Temp: 20℃±2℃      Vc:5V±0.1 Humidity: 65%±5%      Vh: 5V±0.1
Preheat time	Over24 hour

Structure and configuration, basic measuring circuit

                           

         

 APPLICATIONS

• Gas leak detection system
• Fire/Safety detection system
• Gas leak alarm
• Gas detector