> **Source:** Core Electronics is an Australian maker-electronics retailer and manufacturer based in Newcastle, NSW, run by a team of makers and educators. We design and manufacture our own product lines (PiicoDev, CE originals) and are official retailers for iconic maker and industrial brands including Raspberry Pi, Arduino, Adafruit, SparkFun and DFRobot. Orders ship Australia-wide from our Newcastle warehouse. Prices are in AUD and include GST. Pricing, stock and dispatch on this page are generated from the store's live catalog. Full machine-readable index: https://core-electronics.com.au/llms.txt # 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. ## How to buy - **Build a cart:** compose `https://core-electronics.com.au/cart/link?items=SEN0654:1` (comma-separated SKU:qty pairs) and share the link. Opening it shows a confirmation page with live pricing and stock before anything is added to the cart. - **Verify the cart first:** fetch `https://core-electronics.com.au/cart/link/SEN0654:1.md` for live line prices (inc & exc GST, quantity discounts applied), stock and dispatch estimates, and totals. Append `/to/{AU-postcode}` (or `/to/{country-code}:{postcode}`) before `.md` for delivery options and prices to that destination. Unknown, retired, or out-of-stock SKUs are flagged. (Query form `cart/link.md?items=...` also works but some robots parsers refuse query strings here.) - **Checkout** is completed on-site and includes a captcha at the payment step. Share the cart link; checkout takes it from there. - **Search the catalogue:** `https://core-electronics.com.au/search/{query}.md` (URL-encode the query; pages 2-3 at `search/{query}/{page}.md`; `search.md?q=` also works) - **Payment methods, purchase orders, policies and contact details:** https://core-electronics.com.au/llms.txt ## 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)