Precision Methane Gas Sensor TD LAS Based Laser Methane Detector，Product weight 255g

Introduction

The 3.3V laser methane sensor is developed based on the tunable laser gas absorption spectroscopy (TD-LAS), which uses 1653.7nm laser to detect methane gas by characteristic "fingerprint spectrum" absorption, and is resistant to water vapor or other gas interference. Based on the combination of direct absorption and wavelength modulation absorption spectroscopy technology, and the "N" type optical path structure design, long absorption optical path, high detection sensitivity and precision; Choose the low temperature performance of laser and photoelectric detector devices and temperature compensation correction algorithm with wide temperature, environmental adaptability is strong; Standard thread installation interface and standard communication protocol design, strong commonality.

As the core component of methane gas monitor, the product can be widely used in underground space, catering industry, industrial chemical industry and coal mine and other fields of methane gas leakage detection alarm.

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:

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

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

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