MQ-3 데이터시트 PDF

MQ-3 데이터시트 를 다운로드하여 반도체의 전기적 특성과 매개변수에 대해 알아보세요.

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HANWEI ELETRONICS CO.,LTD

MQ-3

http://www.hwsensor.com

TECHNICAL DATA

MQ-3 GAS SENSOR

FEATURES

* High sensitivity to alcohol and small sensitivity to Benzine .

* Fast response and High sensitivity

* Stable and long life

* Simple drive circuit

APPLICATION

They are suitable for alcohol checker, Breathalyser.

SPECIFICATIONS

A. Standard work condition

Symbol

Parameter name

Vc Circuit voltage

VH Heating voltage

RL Load resistance

RH Heater resistance

PH Heating consumption

B. Environment condition

Technical condition

5V±0.1

5V±0.1

200KΩ

33Ω±5%

less than 750mw

Symbol

Tao

Parameter name

Using Tem

Technical condition

-10℃-50℃

Tas Storage Tem

-20℃-70℃

RH Related humidity

less than 95%Rh

O2

Oxygen concentration

21%(standard condition)Oxygen

concentration can affect sensitivity

C. Sensitivity characteristic

Symbol

Rs

Parameter name

Sensing Resistance

Technical parameter

1MΩ- 8 MΩ

(0.4mg/L alcohol )

α

(0.4/1 mg/L)

Concentration slope rate

≤0.6

Standard

detecting

condition

Preheat time

Temp: 20℃±2℃ Vc:5V±0.1

Humidity: 65%±5% Vh: 5V±0.1

Over 24 hour

D. Structure and configuration, basic measuring circuit

Remarks

AC OR DC

ACOR DC

Room Tem

Remarks

minimum value is

over 2%

Remarks

Detecting concentration

scope：

0.05mg/L—10mg/L

Alcohol

Parts

1 Gas sensing

layer

2 Electrode

3 Electrode line

4 Heater coil

5 Tubular ceramic

6 Anti-explosion

network

7 Clamp ring

8 Resin base

9 Tube Pin

Materials

SnO2

Au

Pt

Ni-Cr alloy

Al2O3

Stainless steel gauze

(SUS316 100-mesh)

Copper plating Ni

Bakelite

Copper plating Ni

Configuration A

Fig. 1

Configuration B

Fig.2

A向

TEL: 86-371- 67169070 67169080 FAX: 86-371-67169090

A向

E-mail: sales@hwsensor.com

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