MQ303A 데이터시트 PDF

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MQ303A Alcohol Sensor

Character

* High sensitivity

* Fast response and resume

* Long life and low cost

* Mini Size

Application

MQ303A is semiconductor sensor is for Alcohol detection,

It has good sensitivity and fast response to alcohol,

suitable for portable alcohol detector.

Configuration

Technical Data

Model No.

MQ303A

Sensor Type

Semiconductor

Standard Encapsulation

Metal

Detection Gas

Alcohol

Concentration

20-1000ppm Alcohol

Heater Voltage V H

Loop Voltage Vc

0.9V ± 0.1V AC or DC

≤6V DC

Standard

Circuit

Conditions

Load

RL

Resistance

Heater

Resistance

RH

Adjustable

4.5Ω ± 0.5 Ω（Room Tem.）

Heater Current

Heater Power

Sensor

Consumption

IH

PH

PS

120±20mA

≤ 140 mW

≤10 mW

Character

Sensing

Resistance

Rs

4KΩ-400KΩ(in air)

Sensitivity S

Rs(in air)/Rs(125ppm

Alcohol)≥3

Slope

α 0.50 ± 0.15(R300ppm/R100ppm Alcohol)

Tem. Humidity

20℃±2℃；65%±5%RH

Condition Standard test circuit

Vc:3.0 V±0.1 V DC ；

VH: 0.9 V±0.1 V DC

Preheat time

Over 48 hours

Sensing element of the semiconductor sensor is a

micro-ball, heater and metal electrode are inside,

and the sensing element is installed in

anti-explosion double 100 mesh metal case (see

the above)

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