Laser methane sensor is a precision sensing system based on tunable diode laser absorption spectroscopy technology, which can quantitatively detect gas concentration in various environments (especially harsh environments such as high temperature, high pressure, and high corrosion). It has the characteristics of high accuracy, fast response, good reliability, and low operating costs, bringing great convenience to production optimization, safety monitoring, ring laser methane sensor detection, and scientific research analysis. This sensor is suitable for various applications such as steel metallurgy, petrochemicals, environmental protection, and power equipment.
Measuring gasesCH4、 C2H4、C2H2
measurement range0-100% 、0-1000ppm 、0-1000ppm
Technical PrincipleTDLAS
Application fieldCoal mine power - coal mine fire warning and monitoring
Laser methane sensorProduct Features
performance
High quality: High performance DFB laser, industrial grade quality, quality assurance.
Low interference: More effectively reduces cross interference of other substances with the gas being tested.
High reliability: The overall stainless steel chamber is highly corrosion-resistant and anti adsorption, suitable for industrial grade complex working conditions.
drift
Accurate temperature control: The temperature control of the laser is the key technology of this sensor, and bidirectional PID temperature control technology is used to control the temperature at 0.01 ℃ in order to obtain stable spectra.
Constant temperature treatment: The principle of infrared detection is inherently susceptible to the influence of heat sources, so we have treated the sensor with a temperature higher than the ambient temperature to provide it with a stable environment and achieve smaller zero drift.
compatibility
Multi interface integration: In order to better meet customers' usage scenarios, we have integrated RS-232, RS-485, and 4-20mA interfaces into one sensor, and customers can choose according to their needs.
Air nozzle: Quick twist interface is a commonly used interface for quick connection, making it easier for customers to replace existing products.
Principle of Laser Methane Sensor Technology:
Technical Principle
Tunable diode laser absorption spectroscopy (TDLAS) is essentially a spectral absorption analysis technique that utilizes the selective absorption characteristics of gas molecules towards specific wavelength lasers to analyze changes in laser absorption intensity and obtain gas concentration. Semiconductor laser absorption spectroscopy technology is a high-resolution spectral absorption technique.
Optical structure
The sensor consists of optical components such as a laser, optical fiber, gold-plated gas chamber, and infrared detector. The light emitted by the laser is introduced into the gas chamber through the optical fiber, and after passing through the gas, it is received by the infrared detector. By combining all digital phase-locked modulation and demodulation technology, high-order harmonics, and harmonic dynamic tracking technology to complete signal processing and analysis, the concentration of relevant components in the gas can be accurately obtained.
absorption spectrum
The detection principle is essentially based on the absorption peak spectrum of methane in the near-infrared region. Due to the ability to control the output linewidth of the laser, the generated light can be controlled within a very narrow range, greatly avoiding cross interference from other gases to the measured gas. Compared to traditional NDIR technology that uses filters to limit absorption bandwidth, TDLAS has significant advantages.
Application Scenario:
The GW-3020 TDLAS infrared gas sensor is a new type of laser gas sensor independently developed by our company for oil and gas extraction and industrial process gas analysis. We use high-precision and high-resolution DFB lasers and gas absorption cells with independent intellectual property rights. Sensors have the characteristics of high accuracy, low cross interference, and fast response time.
The product is mainly used in the following situations:
● Process analysis and testing;
Petrochemical environmental monitoring;
Industrial process gas analysis and other occasions.
