Professional Dispersive 0.06% VOL Gas Detector Sensor With IP66 For Various Measurement Applications

Introduction

Using TD-LAS technology, the 3.3V methane laser sensor detects gas through a 1653.7nm laser by absorbing methane's unique "fingerprint spectrum." It resists interference from water vapor and other gases, combining direct and wavelength modulation absorption techniques for high sensitivity. Its "N" type optical path structure allows for a longer absorption path, enhancing precision. Low-temperature laser devices and a temperature compensation algorithm ensure adaptability across different environments. Featuring a standardized interface and communication protocol, this sensor is a core element in methane detection for underground spaces, industries, and mines.

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:
Our Gas Detector Sensor technical support and services offer expert help for troubleshooting and resolving issues, along with repair and maintenance. We also provide calibration and testing to guarantee precise readings, as well as access to product documentation and manuals. Additionally, we assist with product selection and customization to meet your needs. We are dedicated to providing top-tier support to ensure your gas detector sensors perform optimally.

Packing and Shipping:

Product Packaging Includes:

• Gas Detector Sensor device
• Instruction manual
• Mounting accessories
• Calibration certificate

Shipping Details:

• Estimated delivery time: 5-8 business days