DFRobot
Gravity Factory-Calibrated Laser Methane CH4 Sensor
· MPN: SEN0654
This lab-grade methane sensor is designed for quantitative CH₄ measurement in research settings, using TDLAS technology to report methane concentration in %L...
This lab-grade methane sensor is designed for quantitative CH₄ measurement in research settings, using TDLAS technology to report methane concentration in %LEL rather than the broad estimates typical of MQ-style gas sensors.
It is factory calibrated and intended for reliable data collection in complex gas environments such as fermenters, wastewater simulations, biogas systems and adsorption experiments. The sensor provides dual I2C and UART outputs for connection to data acquisition systems, Arduino, Raspberry Pi and custom Python workflows.
When paired with the Gravity: Science Data Acquisition (SCI DAQ) Module, it supports direct reading and timed data logging without programming, with export to analysis-ready Excel or MATLAB files. The package includes one Gravity: Laser CH4 Sensor and one Gravity 4 pin sensor cable.
Specifications:
- Detection gas: Methane (CH4)
- Detection range: 3~100% LEL
- Warm-up time: 15s
- Response time: T90＜15s
- Resolution: 0.1%LEL
- Accuracy: ±2%LEL（@5~20.00%LEL@25℃）
- Accuracy: ±3%LEL（@20~75.00%LEL@25℃）
- Accuracy: ±5%LEL（@75~100.00%LEL@25℃）
- Operating temperature: -13~+58℃
- Operating humidity: 0~95%R.H. (No condensation)
- Operating pressure: 80kPa~115kPa
- Lifespan: ＞10 years
Useful for environmental engineering, chemistry, environmental science and materials research where selective methane measurement and long-duration logging are required.
Jargon buster
Plain-language definitions for the technical terms used above.
- Gravity
- Gravity is DFRobot’s plug-in connector system for sensors, motors and modules, using standard cables to reduce loose jumper wiring. It matters because Gravity-compatible parts can connect directly to these ports, while non-Gravity parts may need adapters or manual wiring.
- I2C
- I2C is a two-wire communication bus used by many sensors and small modules. It matters because several I2C devices can share the same two wires, but each device needs a compatible address and your controller must support I2C.
- UART
- UART is a simple serial connection that sends data over separate transmit and receive wires, often labelled TX and RX. It matters because this module is designed to replace a wired UART cable with a wireless link while keeping the same serial data format.
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Supplier page — dfrobot.com
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