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SERVOTOUGH Laser 3 Plus – product video (English language)

SERVOTOUGH Laser 3 Plus – installation video

SERVOTOUGH Laser 3 Plus – product video (Chinese language)

Laser application in ammonia slip



The SERVOTOUGH Laser 3 Plus Ammonia is a revolution in Tunable Diode Laser Absorption Spectroscopy analysis: a highly compact gas monitor for in-situ cross-stack applications, which delivers exceptional performance benefits in a revolutionary compact design. 

Servomex’s pioneering approach to design has produced an analyzer that occupies a footprint up to 1/10th the size of competitor products. This provides instant benefits in terms of installation ease and flexibility. 

The SERVOTOUGH Laser 3 Plus Ammonia delivers exceptional TDL performance, with a fast response to measuring ammonia in DeNOx applications. Utilizing the latest Wavelength Modulated Spectroscopy (WMS) measurement techniques with unique Servomex signal processing, the Laser 3 Plus Ammonia provides the most stable, repeatable results with minimal installation and maintenance costs. 

  • Compact design
  • Performs in high particulate environments
  • Path lengths from 1m to 10m – dust level dependent
  • Minimal cross interference
  • Diverse mounting: ideal for ducts and stacks
Easy to use
  • Simple to install and operate
  • Robust and reliable
  • 0-15ppm min. range
  • Space saving
  • Digital communications: Modbus, Ethernet
  • User friendly interface rapid disconnect for easy calibration
Low cost of ownership
  • Small, light intuitive alignment for easy installation and maintenance
  • Non-depleting TDL technology requires no replacement
  • No moving parts, no consumables
  • No sampling system reduces maintenance costs
Unrivalled performance
  • Process temperatures up to 600°C
  • Low detection limit
  • Negligable zero drift
Benchmark compliance
  • ATEX, IECEx hazardous area approvals
  • North American hazardous area approvals pending
  • CE approved
  • Wide process ambient temperature range
  • IP66




    131mm width (51/8”) 164mm high (61/2”) 302.4mm deep (119/10”)
    110mm width (45/16”) 146mm high (53/4”) 247.6mm deep (93/4”) 
  • TRANSMITTER: <3.0 kg (6.6 lbs)
  • RECEIVER: <2.0 kg (4.4 lbs)
  • ATEX Cat 3 (Gases)
  • IECEx Zone 2 and Zone 21
  • North American Class 1 Division 2 and Zone 2 (Gas and Dust) pending
  • ATEX Cat 21 (Dust)
  • Safe Area / General Purpose
  • CE marked in compliance with ATEX, EMC, LVD and all other applicable directives


  • Process heaters
  • Incinerators
  • Thermal crackers
  • Thermal oxidizers
  • Power stations
  • Furnaces



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