Maiya Sensor is proud to introduce the new MST LS4 Series Laser Methane Sensor, a high-precision, compact gas sensor based on Tunable Diode Laser Absorption Spectroscopy (TDLAS). It features small size, low power consumption, and high sensitivity, making it ideal for a wide range of applications.

It is suitable for:
1.Urban gas pipeline leak detection
2.Industrial settings such as chemical plants and LNG stations
3.Environmental facilities including biogas projects and wastewater treatment plants
4.Confined space gas safety monitoring in mines, tunnels, and more.

Key Features:
1.Accurate Monitoring, Free from Interference
Utilizing TDLAS technology, the sensor is highly selective only to methane, unaffected by other gases, water vapor, or dust. It offers a measurement range of 0–100% VOL, with a resolution of 0.01% VOL and an error margin as low as ±0.03% VOL (0–1%) or ±5% of the true value (1%–100%).
2.Stable and Reliable with Long Service Life
No frequent calibration is required. The sensor maintains high stability over long-term use, with a lifespan of over 5 years and an IP65 protection rating, making it suitable for various harsh environments.
3.Fast Response and Flexible Output
With a response time of ≤20 seconds, it supports both TTL serial port and 0.4V–2V analog signal outputs, enabling easy system integration and data reading.
4.Compact Design, Wide Applicability
Measuring just Φ20mm × 16.6mm and housed in a 304 stainless steel casing, it is shock-resistant, dustproof, and waterproof, suitable for both fixed and mobile detection scenarios.
Technical indicators and measured data:
project |
parameter |
Object gas |
Methane |
Sampling Method |
Diffusion |
Test Principle |
TDLAS |
Response time |
≤20S |
Range |
0-1%VOL(10000ppm) / 0-5%VOL / 0-100%VOL |
Accuracy |
0-1% ±0 . 03%VOL |
1%-100% ±5% of true value (VOL) | |
Display resolution |
0. 01%VOL |
Expected life |
> 5 years |
Working temperature |
-5℃ to +55℃ (customizable from-40℃ to +70℃) |
Humidity at work |
<98%RH (no condensation) |
Working pressure range |
86Kpa~106Kpa |
Working voltage |
3V-5 . 5V |
Average operating current |
<100mA |
Communication mode |
TTL serial port data and dual 0.4V-2V analog signal outputs |
Outer shell material |
304 stainless steel |
Mechanical dimensions |
Φ20mm*16.6mm (diameter* height) |
Levels of protection |
IP65 |

COMPANY
Founded in 2019, MaiYa Sensor is an enterprise specializing in the R&D, production, and sales of gas sensors, gas detection modules, and complete gas detectors. We are deeply engaged in the field of gas detection and have always been committed to providing customers with suitable, stable, reliable, and cost-effective gas detection solutions.
1.Core Strength
We understand that as our partners, what you care most about are product stability, consistency, cost-effectiveness, and supply capacity. These are exactly the competitive advantages we strive to build:
Independent R&D and production capabilities:
As a source manufacturer with controllable costs, we have our own R&D team and production base, enabling us to oversee the entire process from sensor inspection to complete instrument testing. This ensures our products offer exceptional cost-effectiveness and stable supply cycles.
Strict quality control for reliable quality. We implement a rigorous ISO9001 quality management system. Each sensor leaving our factory undergoes precise calibration and aging tests, guaranteeing fast response speed, high measurement accuracy, long service life, and excellent consistency. This significantly reduces your subsequent maintenance costs and the risk of customer complaints.
A comprehensive product portfolio for one-stop procurement:
Core components. We offer gas sensors based on various principles (such as electrochemical, catalytic combustion, infrared, semiconductor, and PID), covering combustible gases, oxygen, and toxic gases (including CO, H₂S, SO₂, and NO₂). Beyond merely selling products, we possess in-depth expertise in the maintenance and sales of gas detectors. This enables us to provide you with more valuable technical support, including sensor selection guidance, troubleshooting, and alternative solution recommendations—serving as an extension of your technical team.
We can offer flexible OEM/ODM customization services tailored to your specific needs, including adjustments to measurement range, size, interface, and output signal, helping you develop differentiated products.
2.Our Products and Services
Gas Sensors: Electrochemical sensors, catalytic combustion sensors, infrared sensors, semiconductor sensors, PID sensors, etc.
Gas Detectors: Portable and fixed gas detectors (customizable according to customer needs).
Gas Modules: Standardized detection modules supporting multiple gases and various output signals.
Professional Services:
Technical support and solution
consultingOEM/ODM
customizationComprehensive after-sales service and quality assurance system.
3.Mission & Vision
With reliable sensing technology, we safeguard industrial environments as well as life and property safety, striving to become the most trusted partner in the gas detection field. Through continuous technological innovation and lean manufacturing, we promote technological progress and cost optimization in the gas detection industry, aiming to achieve win-win cooperation with our partners.
4. Why Choose Us?
Equipped with independent R&D and production capabilities, we provide you with precise technical support and solutions at more competitive prices. Meanwhile, we strictly control quality to ensure long-term stability and reliability of our products. Having partnered with hundreds of companies in Mexico, Brazil, India, Indonesia, Vietnam, South Africa, and other regions, we deeply understand business needs and can offer efficient communication and services.
We look forward to in-depth cooperation with every partner dedicated to the gas detection industry. For detailed product catalogs, technical parameters, or sample testing, please feel free to contact us!