Fabian Enterprises Ltd MALTA

Products > MODULAR ELECTRONICS > DEVELOPMENT MODULES > SENSOR MODULES

Product Description:

The gas sensing material used in the MQ-4 gas sensor is the two tin oxide (SnO2), which has a low electrical conductivity in the clean air. When the sensor is in the presence of combustible gas in the environment, the electrical conductivity increases with the increase of the concentration of combustible gas in the air. Using a simple circuit, the electrical conductivity can be converted to an output signal corresponding to that of the gas concentration. MQ-4 gas sensor has high sensitivity to methane, and also has good sensitivity to propane. This sensor can detect many kinds of combustible gases, especially natural gas and is a low cost alternative for many applications. 

Suitable for the detection of methane gas in the range of 300 to 10000ppm

 Module feature: 

1. Use of high quality dual panel design, with power and TTL signal output indicator
2. DO switch signal (TTL) output and AO analog signal output
3. TTL output signal is low level. (when the output is low, it can be directly connected to the microcontroller or relay module)
4. Analog output voltage, the higher the concentration of higher voltage
5. Good sensitivity for the detection of methane, natural gas
6. Four screw holes for positioning
7. Dimensions : 32 x 20 x 22mm  (L x W x H)
8. Long term stability
9. Rapid response and recovery characteristics

Electrical performance: 

Input voltage: DC5V power (current): 150mA 

DO output: TTL number 0 and 1 (0.1 and 5V) 

AO output: 0.1-0.3V (relative no pollution), the highest concentration of about 4V 

NOTE: This is an energized sensor and needs a preheat time of 20 seconds, after which the output data will be stable. In environments where heat is not acceptable us the MQ-3 Alcohol Ethanol Sensor.