# Analyzer LaserGas II Single Path


LaserGas II Single Path (SP)

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 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  ounted 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 0.5-20m
Response time: 1 – 2 sec
Accuracy: Application dependet
Repeatability: 1% of range (gas & application specific)

Environmental conditions
Operating temperature: -20 ºC to +55 ºC (special version up to +65 ºC on request)
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
Analog input (2): 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. 20W
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 1.5°
Purge flow: Dry and oil-free pressurised air or nitrogen 10 – 50 l/min (application dependent)

Visual inspection: Recommended every 6 – 12 months
Calibration: Check recommended every 12 months
Validation: In-situ span check with optional internal cell (application dependent)

Laser class: Class 1 according to IEC 60825-1
CE: Certified.
EMC: Conformant with directive 2014/30/EU; Explosion protection (optional) ECEx/ATEX zone 1: II 2 G Ex px IIC T5 Gb I 2 D Ex p IIIC T64°C Db
Laser zone 1: II 2 G [Ex op is T4 Gb] IIC IECEx/ATEX zone 2: II 3 G Ex nA nC op is IIC T4 Gb II 3 D Ex td A22 T100°C
Laser zone 0: II 1 G [Ex op is T6 Ga] CSA: Class I, Div. 2, Groups; A, B, C and D; Temp.
Code T4; non-incendive

Dimension and weight
Transmitter unit: 405 (plus 65 for purge unit) x 270 x 170 mm, 6.2 kg
Transmitter unit: 405 (plus 65 for purge (Ex version) unit) x 270 x 310 mm, 7.9 kg
Receiver unit: 355 (plus 65 for purge unit) x 125 x 125 mm, 3.9 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, Power and heat, Production of technical gases, Pulp and paper plants, 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)