Introduction
This methane laser sensor, operating on TD-LAS technology at 3.3V, detects methane gas via a 1653.7nm laser using its characteristic absorption spectrum. Immune to interference from water vapor and other gases, it combines direct absorption and wavelength modulation techniques. The "N" type optical path structure extends the absorption path, improving precision and sensitivity. It utilizes low-temperature components and a temperature correction algorithm for wide environmental adaptability. With a standard communication protocol and installation interface, it serves as a key component in methane detection systems for coal mines, restaurants, and industrial facilities.
Feature
• High detection accuracy
Direct and wavelength modulation technology combined with folded optical path design, measurement error ≤±6% true value @25℃
• Good environmental adaptability
Wide temperature compensation correction algorithm, can meet -40~+70℃ application
• Strong anti-interference
Methane "fingerprint spectrum" laser absorption detection technology, anti-poisoning, anti-water vapor and other gas interference;
• Strong structural protection
Stainless steel material design, meets the explosion-proof level Exia IIC T6 Ga
• Low cost
Long service life, low power consumption, modular design, easy to integrate
Dimensions
Technical Parameters:
| Parameters | Technical Indicators |
| Measuring gas | Methane |
| Measuring principle | TD-LAS |
| Detection mode | Dispersive |
| Measuring range | 0-20% VOL (customizable) |
| Measurement error @25℃ | <+0.06%VOL,0-1%VOL
<+6%True value,1-20% VOL |
| Lower detection limit | 0.2% VOL |
| Minimum resolution | 0.01% VOL |
| Response time | T90<15s |
| Operating voltage | 3.0VDC ~3.6VDC |
| Average operating current | <30mA |
| Peak current | <210mA |
| Output mode | Standard TTL serial port |
| Operating temperature | -40℃~ +70℃ |
| Operating humidity | 0 ~ 99% RH (condensation) |
| Explosion proof sign | Ex ia IICT6 Ga |
| Intrinsic safety parameter | Ui:3.3V Ii:50mA
Pi:0.250W Ci:20uF
Li:3.14uH |
| Protection degree | IP66 |
| Product weight | 255g |
| Products dimensions | φ41.7mmx63.6mm |
Applications:
a) The sensor continuously outputs the measured methane concentration, measured temperature, measured pressure, laser signal strength, laser operating temperature and fault code through the standard TTL serial port
b) It has a self-test function, which can detect whether the laser, photoelectric detector and voltage stabilization sensor are normal, which helps to eliminate the fault point.
Communication Interface and Definition
Interface form: SH1.0mm/4P
Cable length: 200mm
| Number | Color | Interface definition |
| 1 | Red | VCC |
| 2 | Black | GND |
| 3 | Blue | RX |
| 4 | Green | TX |
Precautions
a) The working voltage of the sensor is 3.3V, and the serial interface level is 3.3V;
b) sensor contains precision optical components, please avoid violent collision;
c) Working environment conditions: -40℃ ~ +70℃
d) Relative humidity 0-99% RH (non-condensation).
Note: The working voltage of the sensor is 3.3V. It is forbidden to connect the power supply voltage exceeding 3.6VDC to the sensor to avoid damage to the sensor.
Support and Services:
The Gas Detector Sensor product technical support and services include:
Expert technical assistance for troubleshooting and problem-solving
Repair and maintenance services
Calibration and testing services to ensure accurate readings
Product documentation and manuals
Assistance with product selection and customization
Our goal is to ensure that our customers receive the highest level of support and service to keep their gas detector sensors working efficiently and effectively.
Packing and Shipping:
Product Packaging:
Gas Detector Sensor unit
User manual
Mounting hardware
Calibration certificate
Shipping Information:
Expected delivery time: 5-8 business days
