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Statement The copyright of this manual belongs to Zhengzhou Winsen Electronics Technology Co., LTD. Without the written permission, any part of this manual shall not be copied, translated, stored in database or retrieval system, also can’t spread through electronic, copying, record ways.
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Zhengzhou Winsen Electronics Technology Co., Ltd MH-Z14A NDIR CO2 Module 1. Profile MH-Z14A NDIR Infrared gas module is a common type, small size sensor, using non-dispersive infrared (NDIR) principle to detect the existence of CO in the air, with good selectivity, non-oxygen dependent and long life.
Zhengzhou Winsen Electronics Technology Co., Ltd 4. Main technical parameters Working voltage 4.5 V ~ 5.5V DC < 60 mA(@5V input) Average current Peak current 150 mA(@5V input) Interface level 3.3 V (5V compatible) Measuring range 0~10000ppm optional (refer to table 2)
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Zhengzhou Winsen Electronics Technology Co., Ltd 图 2 引脚定义 Description Pad1/Pad15/Pad17/Pad23 Vin Voltage Input Pad2/Pad3/ Pad12/Pad16/Pad22 Pad4/Pad21 Analog Output (0.4~2V) Pad6/Pad26 Pad8/Pad20 HD (Zero calibration, low level for more than 7 seconds valid) Pad7/Pad9 Pad11/Pad14/Pad18/Pad24 UART(RXD) TTL Level input Pad10/Pad13/Pad19/Pad25 UART(TXD)...
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Zhengzhou Winsen Electronics Technology Co., Ltd window. 8.3 The sensor should be away from heat, and avoid direct sunlight or other heat radiation. 8.4 Do not use the sensor in the high dusty environment for long time. 8.5 To ensure the normal work, the power supply must be among 4.5V~5.5V DC rang, the power current must be not less than 150mA.
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