Gravity Factory-Calibrated Laser Methane CH4 Sensor

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.