Datasheet MH-441D (Winsen) - 4

Zhengzhou Winsen Electronics Technology Co., Ltd. www.winsen-sensor.com Fig2.Measuring Range and Refrigerant conversion factor Target Molecular No. of Measuring Range Resolution Note Gas Formula decimal 0～5.00% VOL 0.01% VOL 2 Temperature Methane CH4 0～10.00% VOL 0.01% VOL 2 compensation 0～100%LEL 1%LEL None
5.Struction Size
(Tolerance of unmarked dimensions is ±0.2) ◼
Pin definition MH-441D
Pin Pin definition Pin 2 V+ power supply Pin 1 GND Pin 4 Vout (0.4～2 V) Pin 3 UART（RXD） 0～3.0 V 数据输入 Pin 5 UART（TXD） 0～3.0 V 数据输出
6.Output way. 6.1 Analog Output
The output of Vout is proportional to the gas concentration, 0.4-2.0V output stands for 0 to full range. Connection: V+ –5V, GND- Power Ground, Vout-ADC input. After warm-up, Vout will show the voltage standing for the gas concentration. If self-checking detects a fault, the output voltage is 0V. Output concentration = Full range value * output voltage (V)/(2-0.4). Tel: 86-371-67169097 Fax: 86-371-60932988 2 Email: sales@winsensor.com