Specifications:

• Sensor Type: Semiconductor

• Operating Voltage: VCC - 5V ± 0.1V

• Digital Output (DO): TTL 0 and 1 (0.1V and 5V)

• Analog Output (AO): 0.1–0.3V relative to pollution, max 4V at high concentration

• Gas Detection: Natural Gas / Methane

• Detection Concentration: 200–10,000 ppm

• Interfaces: 1 TTL input (HSW), 1 TTL output (ALR)

• Heater Consumption: <750 mW

• Operating Temperature: 14 to 122°F (-10 to 50°C)

• Humidity: <95% RH

• Sensing Resistance: 10KΩ–60KΩ (at 1000ppm CH4)

• Load Resistance: 20KΩ

• Preheat Time: Over 24 hours

• Encapsulation: Bakelite with metal cap

Package:

• 1 x MQ 4 Gas Sensor Module

Description:
The MQ 4 Gas Sensor Module is a semiconductor sensor designed to detect natural gas and methane concentrations. It supports both analog and digital outputs and has a low power heater. Suitable for gas leak detection systems, it works reliably in varying humidity and temperature conditions. Note the long preheat time required for stable operation.

FAQ:

• Q1: What gases does the MQ 4 sensor detect?
  A1: Natural gas and methane.

• Q2: What is the operating voltage of the sensor?
  A2: 5V ± 0.1V.

• Q3: How long is the preheat time?
  A3: More than 24 hours for stable readings.

• Q4: Can it operate in high humidity?
  A4: Yes, it can tolerate up to 95% relative humidity.

• Q5: What kind of outputs does it provide?
  A5: Both digital (TTL) and analog voltage outputs.