Analog Gas Sensor[MQ4]

ZHIWEI ROBOTICS Co.
Analog Gas Sensor(MQ4) Introduction The MQ4 is used in gas leakage detecting equipment in consumer and industry markets,this sensor is suitable for detecting CH4,Natural gas, LNG, avoid exposure to alcohol, cooking fumes, and cigarette smoke. The sensitivity can be adjusted by the potentiometer. Specification - Power supply needs: 5V - Interface type: Analog - Pin Definition: 1-Output 2-GND 3-VCC - High sensitivity to CH4Natural gas - Small sensitivity to alcohol, smoke - Fast response - Stable and long life - Simple drive circuit - Size: 40x20mm Shipping List - Analog Gas sensor (MQ4) 1unit
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Технические характеристики

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Тип технологии
Тип детектируемого газа
Диапазон измерения
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HANWEI ELECTRONICS TECHNICAL MQ-4 DATA www.hwsensor.com MQ-4 GAS SENSOR FEATURES * High sensitivity to CH4,Natural gas. * Small sensitivity to alcohol, smoke. * Fast response . * Stable and long life * Simple drive circuit APPLICATION They are used in gas leakage detecting equipments in family and industry, are suitable for detecting of CH4,Natural gas.LNG, avoid the noise of alcohol and cooking fumes and cigarette smoke. SPECIFICATIONS A. Standard work condition Symbol Vc VH PL RH PH Parameter name Circuit voltage Heating voltage Load resistance Heater resistance Heating consumption Technical condition 5V±0.1 5V±0.1 20KΩ 33Ω±5% less than 750mw Remarks AC OR DC ACOR DC Technical condition -10℃-50℃ -20℃-70℃ less than 95%Rh 21%(standard condition)Oxygen concentration can affect sensitivity Remarks Room Tem B. Environment condition Symbol Tao Tas RH O2 Parameter name Using Tem Storage Tem Related humidity Oxygen concentration minimum value is over 2% C. Sensitivity characteristic Symbol Rs α (1000ppm/ 5000ppm CH4) Standard detecting condition Preheat time Parameter name Sensing Resistance Technical parameter 10KΩ- 60KΩ (1000ppm CH4 ) Concentration slope rate ≤0.6 Temp: 20℃±2℃ Humidity: 65%±5% Ramark 2 Detecting concentration scope: 200-10000ppm CH4 , natural gas Vc:5V±0.1 Vh: 5V±0.1 Over 24 hour D. Strucyure and configuration, basic measuring circuit 1 2 3 4 5 6 7 8 9 Parts Gas sensing layer Electrode Electrode line Heater coil Tubular ceramic Anti-explosion network Clamp ring Resin base Tube Pin Materials SnO2 Au Pt Ni-Cr alloy Al2O3 Stainless steel gauze (SUS316 100-mesh) Copper plating Ni Bakelite Copper plating Ni Fig.2 Fig. 1 Configuration A Configuration B A向 TEL:86-371-67169080 FAX: 86-371-67169090 A向 E-mail: sales@hwsensor.com PDF
Документация на Analog Gas Sensor[MQ4] 

MQ-4.doc

Дата модификации: 13.09.2007

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