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MQ-5 Sensor

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General Description:

MQ5 is a sensitive gas sensor that can detect or sense liquefied gas, propane, butane, natural, and other combustible gases in the environment. And, hence used in gas leakage detectors, and other industrial gas detectors, or monitoring devices. The output voltage of this MQ5 Gas sensor increases when the concentration of gases or a gas increases. Due to its high sensitivity and fast response time, measurements can be taken as soon as possible. The sensitivity of the sensor can be adjusted by using the potentiometer.

Working Principle:

The MQ-5 gas sensor utilizes a sensitive SnO2 filament that changes conductivity when exposed to combustible gases like LPG, correlating with gas concentration. This change in conductivity or resistance corresponds to the gas concentration. The effect is more pronounced at higher temperatures, aided by a resistive heating element. SnO2 exhibits high sensitivity to Methane, Butane, and Propane, while also detecting other combustible gases. The heating coil, in contact with the SnO2 filament, maintains a consistent resistance in clean air. However, when a combustible gas is present, SnO2 filament resistance drops, causing an increase in Output Voltage (Vout). This voltage shift can be measured to ascertain the concentration of the detected combustible gas.

Specifications:

1. Operating Voltage (VDC) is 5V DC.

2. Having an IC chip LM393 voltage comparator.

3. The resistance of the heater element is 31% with a tolerance of ±10%.

4. The sensor features adjustable resistance.

5. Operating Temperature: -20 to 40 °C.

6. It exhibits high sensitivity to LPG (liquefied petroleum gas), natural gas, and town gas. It has a lower sensitivity to alcohol and smoke.

7. It is stable and has a long lifespan.

8. It has a fast response time.

9. Detecting Concentration: The sensor can detect gas concentrations ranging from 200 to 10,000 parts per million (ppm).

Requirements

 

S. No. Component Name Values
1 LM393 (Voltage Comparator) IC
2 MQ-5 Gas Sensor
3 Resistors 10k, 47k, 5.1 Ω,1k
4 Capacitors 104 μF
5 Male connectors (digital/analog) 4
6 Variable potentiometer 10k
7 LED

 

Pin configuration:

 

S. No. Pins Pin Description
1 AOUT Analog data output
2 DOUT Digital data output
3 GND Ground
4 5V(Vcc) Input voltage (3V to 5V)

Applications:

1. Gas leakage detection.

2. Toys.

3. Portable Natural Gas Detectors.

4. Industrial flammable gas alarm.

5. Domestic gas leakage alarm.

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We strive to provide fast and reliable shipping to our customers. Here\\\’s everything you need to know about our shipping process:

  • Dispatch: Within 24 Hours
  • Free shipping across all products on a minimum purchase of $99.
  • International delivery time 5 to 7 business days
  • Cash on delivery might be available
  • Easy 30 days returns and exchanges

Please note that delivery times are estimates and may vary depending on factors such as product availability, destination, and carrier delay

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  1. Returned items must be unused, undamaged, and in the same condition as received.
  2. Original tags, labels, and packaging must be intact and included with the returned item.
  3. Proof of purchase, such as your order confirmation or receipt, is required for all returns.

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