LaserExact 2950

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Specifically designed for extractive trace analysis applications, the LaserExact gas analyzer delivers the exceptional benefits of Tunable Diode Laser (TDL) Technology within a robust and compact analyzer design. 

Able to detect gases including O2, HCl, HF, NH3, CO, CO2, H2O, H2S, the LaserExact combines an advanced multipass long path length cell with Servomex’s superior signal processing. Combined with feature rich operation and a range of digital communication options, the result is unsurpassed low ppb detection limits for most gases - making the LaserExact ideal for the measurement of trace gases offline. 

Ultra-low trace gas monitoring of multipass long path length cells in a compact analyzer with small installation footprint

Gas: Multiple

Measures: ppm,  ppb

Application: Process Control and Quality Control

Sensing Technology: Tunable Diode Laser


  • Refinery monitoring: H2S and CO2 (during Natural Gas refinement) 

  • O2 monitoring in flare gas recovery system 

  • HF and HCI impurity monitoring in process gas 

  • Monitoring pure gas impurities in industrial gas production 

  • Monitoring H2S during biogas production 

  • H2O and H2S in natural gas


  • Ultra-low detection of 8 gases: O2, H2O, H2S, CO, CO2, NH3, HCI and HF 

  • Various communications platforms: RS-232, Optical 10 or 10/100 Base T Ethernet, optional fiber optic (ASCII) 

Easy to use

  • Intuitive, engineer-friendly interaction and use 

  • Easily operable via analog and digital communication options 

  • Compact design with small installation footprint 

  • SIL 1 approved

Low cost of ownership

  • Drift-free TDL technology extends maintenance periods, reducing costs 

  • Remote device interaction via full suite of communications protocols 

  • High grade laser technology provides long life, zero drift solution

Unrivalled performance

  • Uses industry-leading TDL technologies and advanced algorithms for sensitive monitoring 

  • Ultra-low offline trace gas analysis down to 10ppb (gas specific and application dependent) 

  • Manufactured by Servomex - over 60 years’ experience innovating and pioneering gas analysis and thousands of units used in the field every year

Benchmark compliance

  • Designed for use in Zone 2/Div. 2 hazard rated locations 

  • Designed for Zone 2/Div. 2 use without purge


  • Unit: 571mm (22.4) Width x 2200mm (7.8”) High x 600mm (23.6”) Deep 


  • 28kg (62lbs)


  • ATEX Zone II 3 G Ex nA Nc op is Gc IIC T4, II 3 D Ex td A22 IP65 T100°C 

  • North America CSA: Class 1, Div. 2, Groups A, B, C and D, Temp. Code T4; non-incendive 

  • IP 65 


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