MQ-136 MQ136 Semiconductor Sensor for Hydrogen Sulfide

product description
Size: 32mm X22mm X27mm Main chip: LM393, ZYMQ-135gas sensor Third, the working voltage: DC5Volts Fourth, features: 1, with signal output instructions .2, dual signal output (analog output and TTL output) 3, TTL output valid signal Low level. (When the output low signal light, you can directly connect to the microcontroller) 4, the analog output 0 ~ 5V voltage is higher, the higher the voltage. 5, hydrogen sulfide, liquefied petroleum gas, natural gas, city gas, smoke with better sensitivity .6, long service life, stable and reliable 7, the response characteristics of rapid response. Fifth, the application: for home or factory gas leak monitoring device for liquefied petroleum gas, butane, propane, methane, alcohol, hydrogen, flue gas and other monitoring equipment. Apply ocns: SCM learning, electronic competitions, product development, graduation design. Note: This module is MQ-135 hydrogen sulfide sensor, please use about 20S before use: Step 1: Change the module to 5V DC (Note that the positive and negative electrodes do not reverse, otherwise easy Step 2: If DOUT is selected, TTL high and low voltage, the output signal can be directly connected to the microcontroller IO port or NPN transistor to drive the relay, Potential RP here used to adjust the output level conversion threshold, the following diagram can be analyzed, when the sensor detects the measured Gas, the comparator LM393 pin 2:00 voltage,