QXCG104 laser methane sensor is developed based on Tunable Diode Laser Absorption Spectroscopy (TD-LAS). According to the absorption characteristics of methane gas molecules to 1653.7nm infrared "fingerprint spectrum", the concentration of methane gas is detected by direct absorption spectroscopy. The sensor adopts folding optical path structure design, long absorption path, high detection sensitivity and accuracy, and resistance to water vapor and other gas interference; At the same time, the laser and photodetector devices with excellent low temperature performance combined with the wide temperature compensation correction algorithm have strong environmental applicability. Standard thread mounting interface and standard communication protocol design, strong versatility; As the core component of methane gas detector/monitor, this product is widely used in methane gas leakage detection and alarm machine in underground space, catering industry, industrial chemical industry and coal mine.
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Product Features |
 Methane characteristic "fingerprint spectrum" absorption detection，Strong anti-interference.
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 Laser detection, good stability, Calibration free.
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 Non destructive absorption detection, Anti-poisoning, long life.
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 Folding optical path design, High accuracy and sensitivity.
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 Wide temperature compensation correction algorithm, high and low temperature, Environmental adaptability.
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 Standard interface design, Great versatility.
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Product Performance Technical Indicators |
| Category | Parameter | Technical Specification | |||||
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Mode |
QXCG104-A |
QXCG104-B |
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Measurement
Parameters |
Measuring Gas |
Methane |
Methane |
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Detection Principle |
TD-LAS |
TD-LAS |
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Detection Method |
Diffusion |
Diffusion |
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Measuring Range |
0-20%VOL |
0-20%VOL |
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Measurement Error @25℃ |
<±0.05%VOL,0-1%VOL <±5%(True Value), 1-20%VOL |
<±0.06%VOL,0-1%VOL <±6%(True Value), 1-20%VOL |
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Lower Detection Limit |
0.3%VOL |
0.2%VOL |
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Response Time |
T₉₀<15s |
T₉₀<15s |
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Operating
Parameters |
Working Voltage |
3.0VDC~3.6VDC |
3.0VDC~3.6VDC |
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Average Working Current |
<35 mA |
<30 mA |
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Peak Current |
<110 mA |
<110 mA |
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Output Mode |
Standard TTL Serial Port |
Standard TTL Serial Port |
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Working Temperature |
-20℃~+60℃ |
-20℃~+60℃ |
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Working Humidity |
0~95%RH(Non-Condensing) |
0~95%RH(Non-Condensing) |
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Weight&Dimension |
Weight |
90g |
265g |
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Size |
35*26mm |
38*77mm |
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Product Application Scenarios |
This product is mainly used for methane gas monitoring devices. As the core component of methane gas monitoring devices, it is used for methane gas leak detection and alarm. It can be widely used for methane gas leak detection and alarm in underground spaces, catering industry, industrial chemical industry, coal mines and other fields.
