Introduction

The 3.3V methane laser sensor is designed using tunable diode laser absorption spectroscopy (TD-LAS), utilizing a 1653.7nm laser to detect methane via its distinct "fingerprint spectrum" absorption. It's resistant to interference from water vapor or other gases. By combining direct absorption and wavelength modulation technology, and employing an "N" type optical path structure, it achieves a long absorption path, ensuring high sensitivity and precision. The sensor also features a low-temperature laser, a photodetector, and a temperature compensation algorithm, making it adaptable to various environments. Its standardized interface and communication protocol enhance compatibility. This core component of methane detectors is ideal for applications in underground spaces, catering, industrial chemical sectors, and coal mines for gas leak detection and alarms.

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:

Communication Interface and Definition

Interface form: SH1.0mm/4P

Cable length: 200mm

Communication Protocol

(1) Communication interface configuration

UART serial port: Baud rate: 115200, data bits: 8 bits,

Stop bit: 1 bit, parity bit: no check

(2) Description of communication protocol

After the sensor is powered on, it goes through a period of preprocessing (6-10s) and then begins to periodically (1Hz) output a fixed-length string. The string format is shown in the figure above.

Output string parsing (sample):

A 000.00 + 24.0 + 1006.22 + 16.1 + 006.0 B 00 13

A: the frame head;

+000.00: methane concentration value, two decimal places reserved, unit %vol;

+ 24.0: the environment temperature, the unit ℃;

1006.22: the environment pressure, the unit hPa;

16.1: the laser light intensity and effective range 3.6 21.6;

006.0: magnification factor, normal range 1.0-126.0;

00: fault codes

01: abnormal optical signal; 02; Ambient temperature or abnormal pressure; Optical signal is too strong; 04 laser temperature anomaly;

05: light signal is too weak;

13: xor check code

Fault Code

Support and Services

Our Gas Detector Sensor services include expert assistance with troubleshooting and repairs, as well as maintenance, calibration, and testing to ensure precise operation. We provide product manuals and documentation, and offer guidance on selecting and customizing products. We aim to provide top-notch service to ensure your gas detectors operate effectively and reliably.

Packing and Shipping:
Product Packaging:
Gas Detector Sensor unit
User manual
Mounting hardware
Calibration certificate
Shipping Information:
Expected delivery time: 5-8 business days