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TriGas Monitoring System

The TriGas Monitoring System consists of up to three sensors with either Ultima® X3 Technology’s digital communications or Ultima X 4/20mA output with on-board LEDs and relays to provide local alarms. This TriGas system offers  interchangeable smart sensors, internal DC-powered sample-draw pump and a hydrophobic end-of-line filter that makes it  ideal for areas of wastewater treatment plants that are subject to flooding (such as wet wells).

The TriGas Monitoring System typically monitors for oxygen, hydrogen sulfide and combustible gases (methane or petroleum vapors) and is specifically designed for optimum performance within high-moisture environments. This system can also be supplied with the proper options to meet the NFPA 820 section 1.8 standards followed by the wastewater industry.  

  • Ultima X sensors for O2, H2S and IR LEL combustible gas
  • Ultima X sample pump
  • Red strobe
  • 95db Buzzer
  • 25 watt Power Supply
  • Designed for high-moisture environments
  • Nema 4X Fiberglass Enclosure
  • Hydrophobic End-of-Line Filter
  • Inlet/Outlet Flashback Arrestors

Markets: Water Treatment
Applications: Combustible Detection, Oxygen Detection, Toxic Detection

  • Dimensions: 16.3 x 21.1 x 8.9 inches
  • Enclosure Material: 4X Stainless Steel
  • Gas Types: Oxygen, Hydrogen Sulfide and Combustible
  • Operating Temperature Range: -4°F to +122°F
  • Signal Output: Modbus RTU Digital
  • Designs to meet NFAP 820 Standards
  • Dual zone sample inlets
  • NEMA 4X stainless steel enclosure
  • Heater for outdoor conditions
  • Federal horn
  • Amber strobe


Specification: TriGas Ultima X Sampling System 4/20mA Output

Specification: TriGas Ultima X3 Sampling System Modbus RTU Output


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NFPA 820 Fire Protection in WasteWater Treatmetn Plants (when required in specification)

OSHA 29 CFR Part 1910.148 Confined Space

ANSI 2117.1-1989 Safety Requirements