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MQ-2型传感器的特性及主要技术指标
(1)MQ-2型传感器的一般特点
(a)MQ-2型传感器对天然气、液化石油气等烟雾有很高的灵敏度,尤其对烷类烟雾更为敏感。
(b)MQ-2型传感器具有良好的重复性和长期的稳定性。初始稳定, 响应时间短,长时间工作性能好。
(c)MQ-2型传感器具有良好的抗干扰性,可准确排除有刺激性非可燃性烟雾的干扰信息,例如酒精和烟雾等。
(d)电路设计电压范围宽,24V以下均可;加热电压5±0.2V。
(2)MQ-2型传感器的特性参数
(a)回路电压:(Vc) 5~24V
(b)取样电阻:(RL) 0.1~20K
(c)加热电压:(VH)5±0.2V
(d)加热功率:(P)约750mW
(e)灵 敏 度:以甲烷为例R0(air)/RS (0.1%CH4)>5
(f)响应时间:Tres<10秒
(g)恢复时间:Trec<30秒
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