Gravity: Factory Calibrated Laser Quantitative Methane Sensor for Research (Lab-Grade CH4 Data + No Code Excel Export)

The Gravity Factory Calibrated Laser Quantitative Methane Sensor is a research-grade gas detection module powered by the Winsen MH-Z9041A sensor. Built for academic researchers, environmental scientists, and engineers, it delivers interference-free methane measurements in percentage Lower Explosive Limit (%LEL) with zero drift and simple plug-and-play data logging.

Interference-free laser detection technology

Utilising Tunable Diode Laser Absorption Spectroscopy (TDLAS), this module provides selective methane (CH4) detection without electrolyte decay. The optical approach eliminates cross-gas sensitivity from ethanol, carbon dioxide, or hydrogen sulphide in complex test environments.

Publication-grade quantitative accuracy

The sensor measures concentrations from 3% to 100% LEL with 0.1% LEL resolution and an accuracy of plus or minus 2% LEL within standard test ranges. This level of precision provides rigorous, reproducible data suitable for peer-reviewed research papers and methods sections.

Code-free data acquisition workflow

When connected to the Gravity Science Data Acquisition (SCI DAQ) Module, researchers can record continuous trials directly to Excel or MATLAB without writing code. Automated timed logging keeps gathering data during extended multi-day experiments even if your computer enters sleep mode.

Flexible microcomputer and DAQ connectivity

Equipped with standard Gravity I2C and UART interfaces, the sensor connects seamlessly to Arduino, Raspberry Pi, and laboratory DAQ units. Fast plug-and-play wiring allows new experiments to be deployed in minutes without soldering or complex communication debugging.

Long-term stability and durability

Engineered for long-term deployments, the laser sensor delivers over 10 years of operational lifespan without sensitivity drift. This stability removes the need for frequent recalibration across longitudinal biogas, environmental flux, or adsorption studies.

Versatile research application scope

Ideal for monitoring biogas upgraders, landfill emissions, wastewater simulations, and agricultural flux sites like wetlands and rice paddies. It also precisely quantifies gas uptake and breakthrough curves for advanced adsorbent materials like metal-organic frameworks and zeolites.

Downloads & documentation

• Product wiki (DFRobot)