Laser-Gasdetektor NH₃ (TDLS)


Die LGD 2M-Serie basiert auf einer optischen Absorptionsmessung. Die Systeme sind in sich geschlossene OEM-Module, die eine Durchflusszelle für extraktive Messungen verwenden.

ENVEA bietet dieses rackbare und kompakte NH3-Messsystem (3U-Rack) an, das in seine schlüsselfertigen Analysebänke für kontinuierliche Motorgasmessungen integriert ist.

Sein Messprinzip basiert auf der Gasdetektion durch abstimmbare Diodenlaserspektrometrie (TDLS), die viele Vorteile und einen außergewöhnlichen Wert für den Kunden bietet.

  • Made for easy integration in our turnkey EGAS analysis cabinets
  • Optical, contact-less measurement
  • Accurate NH3 monitoring using TDL spectroscopy
  • High selectivity
  • Fast response time
  • Self-contained
  • Continuous sensor status monitoring
  • No maintenance required, no need for re-calibration
  • Low cost-of-ownership
  • Digital and analog data interfaces
  • Hot-gas measurement up to 190°C
In DeNOx systems using urea injection with ammonia (NH3) as a reducing agent, the flow rate and control of NH3 must be continuously adjusted and controlled to prevent excess NH3 emissions (slip), thus reducing environmental impact and cost of reagents. Therefore, to optimize this process, it is necessary to use a continuous emissions analysis system for the online monitoring of NH3.

  • Automotive Test Systems
  • Motor Exhaust Gas Analysis
  • Catalyst testing in automobile, aeronautics and all kind of engines and components
  • Process control & combustion processes
Technical specifications
Gas NH3
Principle of detection Tunable Diode Laser Spectrometry (TDLS)
Ranges 0-100 / 0-20 ppm
Precision 2σ 1.8 ppm @ 1 s
0.8 ppm @ 10 s
Response time < 2 sec (T90) (at gas flow rate of 3 L/min)
Zero drift below accuracy / 24 h (<±2.0 % full scale reading depending on  stability (temperature & pressure)
Span drift below accuracy / 24 h (<±2.0 % full scale reading depending on  stability (temperature & pressure)
Cell temperature range 190°C
Operating temperature +15 to +50°C
Communication RS 232
Dimensions Rack 19″ – 3U
Turnkey Engine Exhausts NH3 cabinet
LGD 2M Turnkey design

Compact NH3 bay, 13U, 79Kg.

LGD 2M Turnkey design

NH3 bay, 22U, 171Kg.

Example of custom integration.
For other configurations, please, contact us
Approvals & certifications
European Conformity: Low voltage
EMC compatibility
CE 2006/95/EG
Safety of laboratory products EN/IEC 61010
Safety of laser products EN/IEC 60825-1
EMC EN/IEC 61326-1
Shock EN60068-2-27
Vibration EN60068-2-6
Electronics conformity RoHS / WEEE

All our EGAS (Engine Gas) range of products is fully compliant to the worldwide vehicle Emission Standards, including CFR 40 -1065, Diesel 2007/2010, Euro V & Euro VI, EEM (Engine Emission Monitoring)