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

**Type:** Product page · **SKU:** SEN0654 · **Brand:** [DFRobot](https://core-electronics.com.au/brands/dfrobot-australia)
**Page:** https://core-electronics.com.au/dfrobot-gravity-laser-methane-ch4-sensor-lab-grade-lel-excel-arduino.html ([markdown](https://core-electronics.com.au/dfrobot-gravity-laser-methane-ch4-sensor-lab-grade-lel-excel-arduino.html.md))

Simplify research with the Winsen MH-Z9041A lab-grade methane sensor. Get LEL-accurate CH4 data to Excel in 1-click—no coding required. Includes...

## Pricing

- **Price:** $119.95 (inc GST) — $109.05 AUD, exc GST

## Availability & dispatch

- Available with a lead time — expect dispatch between Sep 02 and Sep 07.

## Description

The Gravity: Factory Calibrated Laser Lab-Grade Methane Sensor is engineered for researchers who require reliable, quantitative data for publication. Move beyond the qualitative estimations of traditional MQ2 sensors and leverage advanced **TDLAS technology** for interference-proof methane (CH4) detection, with **precise data output in %LEL**. To streamline research workflow, the sensor features **1-click data export to analysis-ready Excel files—no coding or soldering required.**

**Academic-Grade Data Integrity for Credible Results**

The methane sensor delivers quantitative detection with data reported in %LEL (Lower Explosive Limit), producing journal-ready statistics, producing journal-ready statistics and eliminating the vague estimates often rejected in academic review.

It features a 2% LEL accuracy, suitable for citation in the methods section of publications to meet peer-review standards. With zero cross-gas interference, the sensor ensures trustworthy data from complex environments like fermenters or wastewater simulations, where gases such as ethanol or CO2 will not compromise methane (CH4) readings.

**One-Click Data Workflow to Save Weeks of Logging Time**

Pairing the CH4 sensor with the [Gravity: Science Data Acquisition (SCI DAQ) Module](https://www.dfrobot.com/product-2655.html), a no-programming accessory, enables direct data reading and logging without requiring any code. The module's firmware automates data export, generating analysis-ready files for Excel or MATLAB in just three clicks and bypassing the need for manual transcription or Python scripting.

Designed for plug-and-play compatibility with [Arduino](https://core-electronics.com.au/arduino.html) and [Raspberry Pi](https://core-electronics.com.au/raspberry-pi.html), this setup can be deployed in under 10 minutes without soldering or debugging UART codes, freeing researchers to focus on their core work. The timed data-logging feature reliably supports long-duration experiments, such as 48-hour adsorption studies, by automatically saving data even if the connected computer enters sleep mode.

**Lab-Grade Durability, Seamless Connectivity to Laboratory Equipment**

Engineered for longevity, the sensor offers 10 years of stable performance with no drift, eliminating the need for recalibration between experiments throughout a long-term research project. Its Tunable Diode Laser Absorption Spectroscopy (TDLAS) technology ensures zero electrolyte decay, solving the common problem of mid-trial failure seen in electrochemical sensors. The device is equipped with dual I2C and UART outputs, enabling seamless connectivity to a wide range of laboratory equipment,data acquisition systems (DAQs), and custom Python scripts.

### Specification

- 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?)
     ±3%LEL(@20~75.00%LEL@25?)
     ±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
 
### Documents

- [Product wiki](https://wiki.dfrobot.com/_SKU_SEN0654_Gravity_Laser_CH4_Sensor)
- [Schematic](https://img.dfrobot.com.cn/wikicn/62b2fb5caa613609f271523c/b46450d1669a442b83f7c498120cd0d6.pdf)
- [Layout](https://img.dfrobot.com.cn/wikicn/62b2fb5caa613609f271523c/46579b6e4399e0b602c716d5f45fbe3f.pdf)
- [Dimensional drawing](https://img.dfrobot.com.cn/wikicn/62b2fb5caa613609f271523c/569ecaa39b60024aa3e6a763b3a346ac.pdf)
- [Github](https://github.com/dfrobot/DFRobot_MHZ9041A)

## Images

- [Product image 1](https://core-electronics.com.au/media/catalog/product/S/E/SEN0654-1.jpg)