Here is the structured information about the purchase:

Subject of purchase

• What is being purchased: 1 unit of laser methane gas emission detector.
• Key technical requirements:
  • Detected gas: Methane (CH₄).
  • Measurement range: 1-50,000 ppm x m.
  • Accuracy: ±10% at 100,1000 ppm x m at a distance of 2 meters.
  • Detection response time: no more than 0.5 s.
  • Detection distance: 0-30 m.
  • Power supply: AA Ni-MH or…
     
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