Analyzer LaserGas II Single Path Compact


NEO Monitors LaserGas™ is using Tuneable Laser AbsorptionSpectroscopy (TLAS) i.e a non-contact optical measurement method employing solid-state laser sources. The sensor remains unaffected by contaminants and corrosives and does not require regular maintenance. The absence of extractive conditioning systems further improves availability of the measurements and eliminates errors related to sample handling. The monitor is mounted directly onto flanges, which include purge gas connections and a tilting mechanism for easy alignment. Continuous purge flow prevents dust and other contamination from settling on the optical windows. Once power and data lines are connected, measurements are performed in real-time.

Technical data

Optical path length: Typically 0.1-1m
Response time: 1 – 2 sec
Accuracy: Application dependet
Repeatability: 1% of range (gas and application spesific)

Environmental conditions
Operating temperature: -20 ºC to +55 ºC
Storage temperature: -20 ºC to +55 ºC
Protection classification: IP66

Inputs / Outputs
Analog output (3): 4 – 20 mA current loop (concentration, transmission)
Digital output: TCP/IP, MODBUS,

Optional fibre optic
Relay output (3): High gas-, Maintenance, Warning – and Fault relays (normally closed-circuit relays)
Input: 4 – 20 mA process temperature and pressure reading

Input power supply unit: 100 – 240 VAC, 50/60 Hz, 0.36 – 0.26 A
Output power supply unit: 24 VDC, 900 – 1000 mA
Input transmitter unit: 18 – 36 VDC, max. 20 W
4 – 20 mA output: 500 Ohm max. isolated
Relay output: 1 A at 30 V DC/AC

Installation and Operation
Flange dimension alignment: DN50/PN10 or ANSI 2’’/150lbs (other dimensions on request)
Alignment tolerances: Flanges parallel within 1.5º
Purge flow: Dry and oil-free pressurised air or gas or by fan 10-50 l/min per flange (application dependent) 2-4 l/min per flange when set up with thin nozzles (optinal) 

Visual inspection: Recommended every 6 – 12 months (no consumables needed)
Calibration: Recommended every 12 months
Validation: With optional flow through cell

Laser class: Class 1 according to IEC 60825-1
CE: Certified
EMC: Conformant with directive 2014/30/EU

Explosion protection (optional)
IECEx/ATEX zone 2: II 3 G Ex nA nC op is IIC T4 Gb; II 3 D Ex tD A22 T100°C
CSA: Class I, Div. 2, Groups A, B, C and D; Temp. Code T4; non-incendive 

Dimension and weight
Transmitter unit: 195 (plus 65 for purge unit) x270x170 mm, 4.8 kg
Transmitter unit: 195 (plus 65 for purge (EX ver.) unit) x 270×310 mm, 6.5 kg
Receiver unit: 208 (plus 65 for purge unit) x 125 x 125 mm, 2.6 kg
Power supply unit: 180 x 85 x 70 mm, 1.6 kg

Additional information


NEO Monitors


Cement plants, Chemical and petrochemical industry, Coke plants and steelworks, Food industry, Gas industry, Heavy industry, Laboratories and research institutes, Pharmaceutical and cosmetics industry, Power and heat, Printing houses, Production of technical gases, Pulp and paper plants, Semiconductor industry, Sugar-factory, The arms industry, Waste incineration plants, Water and sewage



Measured parameters

Acetylene (C2H2), Ammonia (NH3), Carbon dioxide (CO2), Carbon monoxide (CO), Dichloroethene (C2H2Cl2), Dust, Ethylene (C2H4), Ethylene oxide ETO (C2H4O), Formaldehyde (CH2O), Humidity (H2O), Hydrogen chloride (HCl), Hydrogen cyanide (HCN), Hydrogen fluoride (HF), Hydrogen sulfide (H2S), Methane (CH4), Nitric oxide (NO), Nitrogen dioxide (NO2), Nitrous oxide (N2O), Oxygen (O2), Propylene (C3H6), Water (H2O)