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LaserGas III SP 1

LaserGas III Single Path analyser for oxygen

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NEO TDL Open Path Detection LaserGas III

NEO Monitors LaserGas III oxygen analyzer (3rd generation) is specifically designed for service in hazardous areas. The analyzer consists of transmitter and receiver unit that are mounted diametrically opposite each other on
stack, ducts or reactors. The laser will cross the process gas and concentration changes are detected in-situ and in real time. LaserGas III sets a new standard for fast and reliable Tunable Diode Laser Spectroscopy analysis.
The laser scans the absorption line in milliseconds.


  • Third Generation compact LaserGas™ electronics
  • For ATEX Ex-d and Class I Division 1 areas
  • Fast response time
  • Low power < 10 Watt
  • Suitable for SIL2 applications
  • No interference from other gases
  • Stable calibration, no zero drift
  • No gas sampling: In-situ measurement
  • Safety application
  • Zero gas application
  • No consumables


  • Safety application
  • Chemical industry (inertisation control of reactors, Vinyl Chloride or PVC, Acryl Acid. Solvent acid, carbon black etc
  • Petrochemical industry: FCC units, tail gas treament, flare gas monitoring, vent headers of incinerators, process heaters etc.
  • Steel industry: Coke oven gas, converter coal gas, reheating furnaces
  • and more


  • In-situ monitoring
  • Highly reliable real time analyzer
  • Low maintenance cost
  • Reduce emission to the environment
  • Easy to install and operate
  • Reduce daily operation costs
  • Optimize process
  • Well proven measurement technique
  • Less fuel consumptions
  • Reduced downtime
  • Suitable for SIL2



Detection limit (O2):  100 ppm ** 
Max. process gas temprature:  1500 °C 
Max. process gas pressure:  10 bar abs 
Optical path length:  Typically 0,5 - 20 m  (Application depended)
Repeatability:  1% of range (gas& application spesific) 
Environmental conditions   
Operating temperature:  -20 ºC to +55 ºC 
   (extended rating -40 ºC to +65 ºC on request)  
Storage temperature:  -40 ºC to +70 ºC 
Protection classification:    IP65
Inputs / Outputs   
Analog output (3):  4 - 20 mA current loop 
  (concentration and transmission) 
Digital output:  10/100 Base T 
  Ethernet (Modbus TCP) 
Relay output (2):  High gas, warning and 
  fault (normally closed) 
Analog input:  4 - 20 mA process temperature and pressure reading 
Power supply:  24VDC  (range 18-32 VDC)
Power consumption :  Max. 10 W 
4 – 20 mA output:  500 Ohm max. load impedance, not isolated
Relay output:  1A at 30 V DC/AC 
Installation and Operation   
Flange dimension:  DN50/PN10 or 
  ANSI 2ff/150 lbs (other dimensions on request) 
Alignment tolerances:  Flanges parallel within 1.5o 
Purging of windows  Dry and oil-free pressurised air or gas, or by fan 
Purge flow:  10-50 l/min 
  (application dependent) 
Calibration:  Check recommended 
  every 12 months 
Laser class:  Class 1 according to IEC 60825-1, eye safe 
CE:  Certified 
EMC:  Conformant with directive 2004/108/EC 
ATEX zone 1:  II 2 G Ex d [op is] IIC T4 
(TU/RU)  II 2 D Ex tb IIIC T78‹C 
  II 2 D Ex tb IIIC T88‹C 
  Db (Lasergas III Ext) 
CSA: Class I Div. 1, 
  Groups B, C and D 
ATEX rating connection box:  II 2 GD Ex e IIC T5 Gb  -40‹C .TA.65‹C 
Functional safety: Designed according to SIL 2; IEC 61508 






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