A sensor designed to perform in all environments.


The GasGuard NH3 utilizes proven electrochemical sensor technology for fast and accurate leak detection. The standard detection range of the GasGuard NH3 provides real-time continuous monitoring of ammonia concentrations accurately down to 5 ppm, with no false alarms. Every GasGuard NH3 sensor comes equipped with an intelligent internal temperature control designed to perform in the harshest areas. The controlled environment provides optimum moisture control for extended cell life. The high-quality injection-molded polycarbonate enclosure offers excellent chemical corrosion protection and high impact resistance. The GasGuard NH3 provides an industry standard linear 4/20 mA output signal compatible with most gas detection systems and PLCs. The output signal is not affected by drastic temperature variations such as washdowns, defrost cycles, etc.

Key Features

  • 2-year warranty, including replacement sensor element
  • Electronics are potted to completely eliminate corrosion in wet environments
  • Ammonia specific electrochemical sensor technology. Absolutely no false alarms
  • No more special-order guesswork or added costs for heated enclosures
  • Industry standard linear 4/20 mA output
  • Corrosion, weather, and chemical resistant polycarbonate sensor enclosure
  • Intelligent-design temperature controlled enclosure for improved cell life
  • Sensor designed to adapt to any harsh environment from -50°F to +140°F
  • Accurately monitor OSHA’s PEL, STEL, and IDLH setpoints
  • Real-time continuous monitoring for early leak detection
  • Any sensor can be field calibrated to any range listed


  • Versatile for any application
  • Easy to order
  • Low cost
  • Simple operation
  • Rugged and reliable


  • Food Processing areas
  • Cold Storage
  • Compressor Rooms
  • Tank Rooms
  • Ventilation Ducts
  • Sea Vessels
  • Refrigeration Systems
  • Perimeter Monitoring
  • Pulp and Paper
  • Heat Treatment
  • Breweries
  • Chemical Plants


GasGuard NH3 Brochure

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