ULTIMA X Series Gas Monitors


The ULTIMA X series of gas monitors is available with catalytic sensors for combustible gas and electrochemical sensors for toxic and oxygen [ULTIMA XE] or infrared for combustible gas [ULTIMA XIR].

The state-of-the-art design provides ease of use and maintenance and notably the XIR technology’s outstanding long term accuracy extends the calibration interval.

All ULTIMA X series monitors are protected by a rugged, explosion proof stainless steel enclosure and are suitable for indoor and outdoor applications in virtually any industry including offshore operations.

The monitors can be deployed as stand-alone units, but also provide a 4 to 20 mA output for connection to controllers. In addition, the ULTIMA X3 range now supports ModBUS RTU communication with PLC, DCS or other control systems.


  • Stainless steel explosion-proof, multiple-entry enclosure
  • Large LCD for numerical data as well as clear text messages
  • Unified sensor electronics for multiple detection and monitoring technologies
  • Single-board design greatly simplifies servicing
  • “Quick-check” LEDs indicate system conditions, with good visibility even from a distance
  • Optional field-programmable relays
  • Remote sensor option
  • Automatic compensation for changes in temperature and humidity
  • All calibrations and adjustments made using non-invasive calibrator or controller [IR interface]
  • Sensors can be changed under power in the field, even in hazardous areas [catalytic and electrochemical sensors]
  • 4 –20 mA output signal [ULTIMA XE]
  • Digital ModBUS RTU communication [ULTIMA X3]
  • Up to three sensors per monitor [ULTIMA X3]
ULTIMA X Series Gas Monitors
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