Jinan Jiahong Technology Co., Ltd

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Laser Methane Sensor

Operating on the principle of laser spectral absorption, this sensor utilizes an internal circuit to drive a laser diode that emits a specific wavelength of light. After passing through the target gas, the light is received by a detector and converted into an electrical signal. The main control chip then accurately calculates the methane concentration by analyzing the degree of laser attenuation.

Product Introduction

Operating on the principle of laser spectral absorption, this sensor utilizes an internal circuit to drive a laser diode that emits a specific wavelength of light. After passing through the target gas, the light is received by a detector and converted into an electrical signal. The main control chip then accurately calculates the methane concentration by analyzing the degree of laser attenuation.
The measurement result is displayed in real time on an LCD or digital tube screen. Data and device status are transmitted via an RS485 bus to a monitoring host. When the concentration exceeds the preset threshold, the sensor immediately activates both audible and visual alarms and triggers a switch signal output, enabling both local and remote linked warnings.
Technical Parameters
① Structural Characteristics
Dimensions: 170 mm × 240 mm
Weight: 2.5 kg
Protection Rating: IP68
② Power Supply Characteristics
Rated Voltage: DC 18 V
Operating Voltage Range: DC 9 V ~ 24 V
Maximum Operating Current: ≤100 mA
③ Performance Indicators
Methane Measurement:
Measuring Range: 0~100%
Measurement Accuracy:
0~1% Range: ±0.05%
1~100% Range: ±5% of Reading
Communication Interface:
RS485 Interface:
Baud Rate: 1200~38,400 bps
Signal Peak Voltage: ≤3.3 V
Switching Output:
Channels: 1
Output Type: Normally Closed (activated during alarm)


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