Methane detectors recommend

Have you ever used any useful methane detector for uav? I’m looking for a more accurate methane detector, and I’m currently considering DJI’s U10 and Purway’s UAV TDLAS Methane Leak Detector Model II.
Purway’s detection distance can reach 300M, which is farther than DJI U10. But Purway Methane Leak Detector I’m not sure if it can be trusted

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