Analyzer LaserGas™ III SinglePath CO


NEO Monitors LaserGas™ III SP CO analyzer (3rd generation) is specially designed for operation in hazardous areas and it provides real time in-situ CO measurements for virtually any type of combustion control. The configuration is transmitter/receiver units for cross-stack installation. An external junction box simplifies installation and maintenance. The operation principal is based on the well proven Tunable Laser Absorption Spectroscopy (TLAS) implemented using a fast scanning absorption technique with fully digital signal processing. Years of experience allowed us to carefully design this highly compact CO analyzer which offers exceptional performance in harsh environments, is truly robust and provides immediate benefits in terms of operational ease and low cost of ownership.

Technical data

Detection limit (CO): 0.5 ppm **
Max process gas temperature: 1300 ºC
Max process gas pressure: 1.5 bar abs
Optical path length: Typically 0.5 – 20m
Repeatability: +/- 0.5 ppm or +/-1%; relative, whicever is greater (application dependent)
Linearity: < 1 % of range
Response time: ≤ 5 sec

Environmental conditions
Operating temperature: -40 ºC to +65 ºC
Storage temperature: -40 ºC to +70 ºC
Protection classification: IP65

Inputs / Outputs
Analog output (3): 4 – 20 mA current loop (concentration CO, transmission, concentration CH4)
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: 1 A at 30 V DC/AC

Installation and Operation
Flange dimension: DN50/PN10 or
ANSI 2’’/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 M 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 Gb (TU/RU) II 2 D Ex tb IIIC T78°C Db; II 2 D Ex tb IIIC T88°C Db (Lasergas III Ext)
CSA: Pending
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

 Dimension and weight
Transmitter and receiver unit (TU/RU): 215 mm (length, add 50 mm for purge unit) x 125 mm (diameter), 3,5 kg each TU/RU connection box: 260 x 160 x 90 mm, 2.5kg
**NOTE: Detection limits are specified as the 95% confidence interval for 1 m optical path and gas temperature / pressure = 25ºC / 1 bar abs. Measured in N2. Special process conditions on request

Additional information


NEO Monitors


Cement plants, Chemical and petrochemical industry, Coke plants and steelworks, Gas industry, Heavy industry, Power and heat, Production of technical gases, Waste incineration plants

Measured parameters

Carbon monoxide (CO)