Figaro Engineering TGS2611-C00 Methane & Natural Gas Sensor - TO-5 Metal Can

Both the heater and the sensor circuit require a stable 5.0V DC supply, with a tolerance of ±0.2V. It is critical to provide clean, regulated power to ensure accurate and stable sensor readings and to prevent damage to the internal heater element.

The sensor outputs a variable resistance. You must connect it in series with an external load resistor (minimum 0.45 kΩ) between the circuit voltage (Vc) and ground. The voltage across this load resistor changes with gas concentration and can be read by an analog-to-digital converter (ADC) on a microcontroller or measurement circuit.

This sensor is specifically sensitive to methane (CH4) and natural gas, which is primarily composed of methane. Its typical detection range is 1 to 25% of the Lower Explosive Limit (LEL), making it suitable for safety-critical leak detection applications in residential and industrial settings.

Yes, for accurate concentration measurement, the sensor requires calibration with a known standard gas. The baseline sensor resistance can also drift over time and with environmental changes, so periodic calibration or baseline adjustment is recommended for precision applications, especially those meeting safety standards like UL1484.