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Landtec SEM5000 Portable Methane Detector QED/Landtec Get Quote



The SEM5000 Portable Methane Detector is the ideal instrument for landfill surface emissions monitoring, reporting and detecting potential leaks at wellheads and surface penetrations. Thanks to our patented laser technology, the SEM5000 is selective, specifically to methane and is able to detect methane emissions from 0.5ppm to 100% concentration. The SEM5000 is ATEX Zone 1 certified and meets all Method 21 requirements, making it the perfect tool for regulatory compliance.

Key Features

  • Specific to Methane, no cross-gas or false readings
  • Wide measurement range (less than 2.5 seconds)
  • Integral GPS and Bluetooth
  • GPS accuracy: 2-4 meters
  • Meets EPA method 21 requirements
  • ATEX certified - Zone 1
  • Laser technology
  • Hot swap battery


  • Landfill surface emissions monitoring
  • Reporting and detecting potential leaks at wellheads and surface penetrations

Technical Specifications

Target Gas Methane (CH4)
Detection Method Tunable Diode Laser Absorbtion Spectroscopy
Measurement Range 0.5ppm to 100% volume
Instrument Resolution 0.1ppm (0 - 100ppm), 1ppm (100 - 1,000ppm), 5ppm (1,000 - 5,000ppm), 10ppm (5,000 - 10,000ppm)
Pump Flow Rate 0.6 to 1 l/min
Sampling Probe Outside Diameter 4mm
Intrinsic Safety ATEX Zone 1 Ex II 2 G Ex ib op is IIB T3 Gb Tamb: -30°C to +50°C
Response Time T90 = 2.5 seconds T90 = 3.5 seconds (w/probe)
GPS Accuracy 2 to 4 meters
Power Supply Lithium Ion Rechargeable Battery Pack (3.7V - 4000mA/h)
Battery Autonomy 10 hours at 68°F (with backlight activated). 8 hours at extreme temperatures
Battery Charge Duration 8 to 10 hours to full charge
Temperature Range -13°F to 122°F
Warm Up Time 30 to 60 seconds


  US Metric
Weight 3.5 lbs


Landtec SEM5000 Manual.pdf
Landtec SEM5000 FAQs.pdf