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MST LS4 Series Laser Methane Sensor

The LS4 series laser methane sensor is a high-precision, miniaturized gas sensor designed based on Tunable Diode Laser Absorption Spectroscopy (TDLAS) technology. It features small size, low power consumption, stable performance, long service life of sensor components and high sensitivity.

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Product Description

Sensor features:

• Good stability, no calibration required;

• Unique selectivity to methane, not interfered by other gases, water vapor or dust;

• Fast response speed, wide measurement range and high measurement accuracy;

• Shockproof, waterproof and dustproof performance;

• TTL serial port and analog signal dual output;

project	parameter
Object gas	Methane
Sampling Method	Diffusion
Test Principle	TDLAS
Response time	≤20S
Range	0-1%VOL（10000ppm） / 0-5%VOL / 0-100%VOL
Accuracy	0-1% ±0 . 03%VOL
	1%-100% ±5% of true value (VOL)
Display resolution	0. 01%VOL
Expected life	> 5 years
Working voltage	3V-5 . 5V
Average operating current	<100mA
Communication mode	TTL serial port data and dual 0.4V-2V analog signal outputs
Outer shell material	304 stainless steel
Mechanical dimensions	Φ20mm16.6mm (diameter height)
Levels of protection	IP65

Size and Pin Definition

Standard 4 Series:

图片4.png 图片5.png

Pin symbol	Description
V+	Power input Voltage range: 3.0V-5.5V DC
Gnd	Power input (ground)
Tx	Serial port, circuit board serial port transmitter
Rx	Serial port, circuit board serial port receiver
DA	Analog Voltage Output Terminal OV Sensor Fault 0.2V sensor preheat status 0. 4-2V corresponds to 0-100% FS, 2.2V indicates over-range.

Precautions

• Before use, ensure the power cord is connected correctly and the voltage is normal.

• Do not disassemble or repair the sensor in an explosive gas environment.

• Do not place the sensor near high temperatures or fire sources.

• If using a battery for power supply during testing, the test must be conducted in a safe area.

• It is recommended to use a dedicated adapter for external wiring welding during independent testing.

• For products that have passed explosion-proof inspection, do not arbitrarily replace or modify components and structures that affect explosion-proof performance.

• Installation must comply with the requirements of GB/T 3836.15-2017 Explosive Atmospheres - Part 15: Design, Selection and Installation of Electrical Installations.

• Do not attempt to disassemble or repair the sensor by yourself.

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