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Smoke sensor MQ-2 gas sensor loose

CC1212130742

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Seller Name : Mod N Shields
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MQ-2 The gas sensor prefix = o ns = urn: schemas-microsoft-com: office: office

Technical Parameters

Feature

Wide range of high sensitivity detection / rapid response and recovery / Excellent stability / long life Simple drive circuit

Applications for home and gas leakage monitoring devices, suitable for the detection of liquefied petroleum gas, butane, pane, methane, alcohol, hydrogen, smoke and the like. specification

  • A. Standard Operating Conditions
  • B. Environmental conditions
  • C. Sensitivity characteristics
  • D. Shape structure test circuit

 

 

symbol

parameter name

Technical conditions

Remark

Vc

Circuit voltage

15V

AC or DC

VH

Heating voltage

5.0V 0.2 V

AC or DC

RL

Load Resistance

Adjustable

 

RH

Heating resistor

31 3

Room temperature

PH

Heating consumption

900mW

 

 

 

 

symbol

parameter name

Technical conditions

Remark

Tao

Operating temperature

-10 ? -50 ?

 

Tas

Storage temperature

-20 ? -70 ?

RH

Relative humidity

Less than 95% RH

O2

Oxygen concentration

twenty one%( Standard conditions ) Oxygen concentration can affect sensitivity characteristics

2% greater than the minimum value

 

 

 

symbol

parameter name

Technical Parameters

Remark

Rs

Sensing Resistance

3K -30K (1000ppm Isobutane )

Detection concentration range 100ppm-10000ppm LPG and pane 300ppm-5000ppm Butane 5000ppm-20000ppm Methane 300ppm-5000ppm hydrogen 100ppm-2000ppm alcohol

(3000/1000) Isobutane

Concentration slope

0.6

Standard Operating Conditions

temperature: 20 ? 2 ? Vc: 5.0V 0.1V Relative humidity: 65% 5% Vh: 5.0V 0.1V

Warm-up time

Less than twenty four hour

         

 

 

prefix = v ns = urn: schemas-microsoft-com: vml

MQ-2 The structure and appearance of the gas sensor of FIG. 1 Shown ( structure By a micro AL 2 O 3 Ceramic tube, SnO 2 Sensitive layer , Electrode sensor and a heater fixed measuring cavity in a plastic or stainless steel heater vides the necessary working conditions for the gas sensor. Encapsulated gas sensor has a 6 pin, 4 of which used to fetch signals, two for viding heating current.

Measurement circuit 2 shown in FIG. .

E. Sensitivity characteristics

 

Map 3 Given MQ-2 Type gas sensor sensitivity characteristics. Wherein: Temperature: 20 ?, relative humidity: 65% , Oxygen concentration: 21% RL = 5k Rs : Sensor resistance at different gases at different concentrations. R 0: Element resistance in the clean air.

Figure 3 MQ-2 Type gas sensor sensitivity characteristics

 

Map 4 Given MQ-2 Based on temperature and humidity of the gas sensor Ro: 20 ?, 33% RH Under the conditions, 1000ppm Hydrogen Zhong

Member resistance. Rs: Different temperatures, humidity, 1000ppm Hydrogen element resistance. .

 

Sensitivity adjustment

MQ-2 Different type of gas sensor

 

Species, different concentrations of the gas have different resistance values. Therefore, the use of such

Type gas sensor, the sensitivity adjustments

Map .4

It is very ant. We recommend that you use 1000ppm Hydrogen or 1000ppm Butane calibration

sensor.

   

 

 

When accurately measuring, the alarm should consider the impact of temperature and humidity.

 

 



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Additional Information

SKU CC1212130742
Cash on Delivery No

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