Ultima® X Series Gas Monitors

Ultima X Series Gas Detector for indoor or outdoor continuous monitoring of hazardous gases. Designed to provide thorough, continuous monitoring of many hazardous gases, the indoor/outdoor Ultima X Series Gas Monitors offer excellent performance and MSA quality craftsmanship. DuraSource™ Technology offers extended sensor life, while HART provides convenient setup, calibration and diagnostics. HART also allows for existing component install and wiring to be used. A single circuit board increases reliability, while our patented sensor disconnect-underpower feature allows all sensors to be replaced in hazardous areas without area declassification. The units are crafted from either stainless steel or polycarbonate, and the interchangeable smart sensors eliminate the need for reconfiguration. Our scrolling LCD screen display sensor reading and gas type, while the calibration process includes date stamping and the ability to calibrate locally or remotely.


  • Indoor/outdoor monitors feature HART, providing more information and features convenient set-up, calibration and diagnostics
  • Interchangeable smart sensors eliminate need for reconfiguration
  • MSA’s patented SafeSwap sensor design allows sensor replacement without declassifying the hazardous area
  • DuraSource Technology extends sensor life
  • Automatic calibration adjustments and date stamping
  • Stainless steel and polycarbonate models available


Approvals subject to change without notice and may differ based on configuration, part number and/or country.
Contact Customer Service or check approval label on product for specific approval information.


  • Ultima X Series Bid Specification
  • Ultima X3 Bid Specification
  • Gas Types: XE, XA Combustibles, Oxygen and Toxics; XIR Combustibles; 0-100% LEL
  • Temperature Range: -40°C to +60°C [-40°F to +140°F] [Typical, Range for Some Gases May Differ]
  • Humidity: XE, XA 15%– 95% RH, Non-Condensing; XIR 0%– 95% RH, Non-Condensing
  • Weight: XE Stainless Steel 4.7 kg; XA Polycarbonate 0.68 kg; XIR Stainless Steel 4.9 kg
  • Dimensions: XE 160 x 99 x 261 mm; XA 130 x 76 x 239 mm; XIR Stainless Steel 320 x 99 x 144 mm
  • Material: 316 Stainless Steel, Polycarbonate

Ordering Options