MQ-5: ตรวจจับแก๊ส LPG, แก๊สธรรมชาติ, เชื้อเพลิงเหลว เหมาะสำหรับระบบเตือนภัยในครัวเรือน MQ-5: ตรวจจับก๊าซในครัวเรือน
- แก๊ส LPG
- ก๊าซธรรมชาติ
- ก๊าซถ่านหิน
MQ-5 sensor Introduction :
Sensitive material MQ-5 gas sensor is used to clean the air in the lower conductivity of tin dioxide (SnO2). When there is the environment in which the combustible gas sensor , conductivity sensor with increasing concentration of combustible gases in air increases . Using a simple circuit to convert the change in conductivity of the gas concentration corresponding to the output signal. MQ-5 gas sensor of high butane , propane, methane sensitivity, methane and propane can be better taken into account. This sensor can detect a variety of combustible gases, especially natural gas , is a low-cost sensor for a variety of applications .
Suitable for home or industrial liquefied petroleum gas , natural gas, coal gas monitoring devices. Excellent resistance to alcohol, smoke interference.
Module Features :
1 , using high-quality dual-panel design, with power indicator and TTL signal output instructions;
2 , the switching signal having a DO (TTL) output and analog output AO ;
3, TTL output valid signal is low . ( Low-level signal when the output light can be directly connected to the microcontroller or relay module )
4 , the higher the voltage , the concentration of the analog output voltage is higher.
5 , for gas, natural gas has a better detection sensitivity .
6 , there are four screw holes for easy positioning ;
7 Product dimensions : 32 (L) * 20 (W) * 22 (H)
8 , has a long life and reliable stability
9 , rapid response and recovery characteristics
Electrical properties:
Input voltage : DC5V Power consumption ( current ): 150mA
DO output : TTL digital 0 and 1 ( 0.1 and 5V)
AO output :0.1-0 .3 V ( relative to pollution ) , the maximum concentration of a voltage of about 4V
Special note: After the sensor is powered , needs to warm up around 20S, measured data was stable , heat sensor is a normal phenomenon , because the internal heating wire , if hot is not normal .
Size: 32mm X22mm X27mm
Main chip: LM393, ZYMQ-5 gas sensor
Operating voltage: DC 5 Volt
Features:
1. Indication of the signal output.
2. Dual signal output (analog output, and TTL level output)
3. TTL output signal is low. (When low output signal light, and can be connected directly to the microcontroller)
4. 0 ~ 5V analog output voltage, the higher the concentration, the higher the voltage.
5. Liquefied petroleum gas, natural gas, city gas, better sensitivity.
6. Has a long life and reliable stability
7. Fast response and recovery characteristics
Applications:
Liquefied petroleum gas, natural gas, coal gas monitoring device suitable for home or industrial. Excellent resistance to alcohol, smoke interference ability.