Laser gasanalyser are measuring instruments that use laser absorption to detect and measure the concentration of gases in a sample. Used in various sectors, such as the chemical industry, thermal power generation or waste incineration, it offers high precision, rapid analysis and the ability to identify gas composition.
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In-situ laser method for rapid measurement. Long-term stability and low maintenance.
The ZSS laser gasanalyser is designed for waste incinerators, district heating, industrial boilers and chemical plants.
NH3 - HCI - CO - O2 - CO2 - CH4
high precision
compact
Easy maintenance
Quick response
This gasanalyser uses a semiconductor laser emitting in the near infrared and measures the variation in absorption of a certain wavelength to determine the concentration of the gas.
Purge system reduces risk of zero drift due to clogging
Compared with traditional methods (sampling), direct measurement provides a considerably faster response.
Simultaneous measurement of CO and O₂ gases enables precise control of the air-fuel ratio while reducing installation and maintenance costs.
O2analyser for combustion control is compatible with instrument air purging.
Operating principle and Measurable Components
Operation is based on a semiconductor laser that guarantees precise, reliable measurement. In-situ technology enables direct measurement of gaseous components, eliminating the need for sampling.
The heart of this analyser lies in its use of a laser as a light source, specifically a near-infrared semiconductor laser. This advanced technology enables in-situ measurement of gaseous components such as NH3, HCI, CO, O2, CO2 and CH4. The versatility of these measurements makes them an indispensable tool in a wide range of industrial applications.
Advanced technical features
Light Source and Laser Class
The light source, a near-infrared semiconductor laser, guarantees high accuracy in the measurement of gas concentrations. It's important to note that the laser class used is CLASS 1, with exceptions for high-temperature and air-purge versions of O2 analysers , which correspond to CLASS 3B, ensuring safe use.
Power and Consumption
Theanalyser is compatible with supply voltages ranging from 100 to 240 Vac at 50/60 Hz, making it easy to integrate into a variety of industrial environments. Power consumption is limited to 80 VA, underlining the energy efficiency of this device.
Calibration interval
Maintaining measurement accuracy is essential, and the laseranalyser suggests a calibration interval of every 6 months. This period may vary according to environmental conditions.
Display and Information
The backlit LCD screen offers a user-friendly interface, displaying crucial information such as measured component, concentration (instantaneous value, average, corrected instantaneous O2 value, corrected average O2 value), and alerts.
Weight, dimensions and protection class
The design of theanalyser takes into account ease of installation. The weight of the receiver and transmitter is around 10 kg each, while the controller weighs around 8 kg. The various dimensions (receiver, transmitter and controller) allow flexibility in placement. What's more, the IP65 rating underlines the robustness of the device, protecting it from the elements.
Exceptional Performance
The performance of this in-situ laser analyser is underlined by its fast response, high repeatability, and ability to maintain long-term accuracy. With features such as minimal zero drift and resistance to interference, it is an ideal choice for a wide range of industrial applications.
Rapid response for real-time monitoring
The response speed of the laseranalyser is impressive, reaching a time of less than or equal to 4 seconds, and even faster, ≤ 2 seconds, for the high-speed version. This ability to deliver near-instantaneous results enables real-time monitoring, essential in dynamic industrial environments.
Repeatability and linearity
Theanalyser maintains exceptional repeatability, limited to ≤ ±1.0% of range, depending on components and measurement scales. This feature is essential to guarantee consistent results. In the case of combined CO + O2 measurement, accuracy is maintained at ±2% of full scale.
Linearity, another crucial quality, also remains outstanding, with a tolerance ≤ ±1.0% of full scale, depending on components and scales. For CO + O2 measurement, linearity remains excellent, with an accuracy of ±3% of full scale.
Zero drift and the effect of interference
The laseranalyser offers exceptional stability, with zero drift limited to ≤ ±2.0% of full scale over a period of 6 months, depending on the component and measurement scale. CO + O2 measurement maintains even more impressive accuracy, with drift limited to ±4% of full scale over the same period.
The effect of interference is minimized, with a maximum variation of ≤ ±2.0% of full scale. This ability to resist interference contributes to the reliability of results in complex environments.
Detection limit
In-situ laseranalyser also excels in terms of sensitivity, with a remarkable detection limit of no more than 1% of the minimum scale. This ability to detect very low concentrations is essential for accurate monitoring, even in conditions where gas levels are minimal.
Input/output signals
Analog outputs for maximum flexibility
Theanalyser features analog outputs, offering a signal range of 4-20 mAdc or 1-5 Vdc, with a choice of 2 or 4 points. These outputs allow transmission of the measured value as well as the corrected oxygen (O2) value. In addition, flexibility is maximized thanks to the ability to switch between instantaneous and average values, offering greater adaptability to specific monitoring needs.
Analog inputs for precise correction and compensation
The laseranalyser 's analog inputs are essential for accurate correction and compensation of measurements. Key parameters such as sample gas pressure, temperature, flow velocity, O2 content, water concentration and air purge pressure are integrated via 2-point 4-20 mAcc signals. These inputs play a crucial role in measurement adjustment, ensuring maximum accuracy even under variable conditions.
Digital outputs for sophisticated control
Digital outputs enhance theanalyser 's control capabilities with a 6-point relay contact output. These outputs enable management of low-light transmission, high and low limit alarms,analyser faults, calibration processes in progress or measurement hold, power failures, and installation faults. This versatility offers sophisticated control for proactive monitoring.
Digital inputs for remote control (Optional)
As an option, the gasanalyser can be fitted with digital inputs via a 3-point photocoupler. These inputs enable advanced functions such as resetting the average value to zero, alternating between instantaneous and sliding average values, and holding the measurement remotely. This option adds an extra dimension to remote device management.
Installation environment
Extended ambient temperature for maximum adaptability
Theanalyser is designed to operate over a wide range of ambient temperatures, ensuring its reliability in diverse industrial environments. The receiver and transmitter can operate in conditions ranging from -20 to +55°C, while the controller is suitable for temperatures from -5 to +45°C. This extended range means it can be used in applications where temperature variations are unavoidable.
Humidity Control to Preserve Measurement Accuracy
Humidity management is crucial to maintaining measurement accuracy. The device is designed to operate in conditions where ambient humidity does not exceed 90% RH (relative humidity). This ensures that measurements remain stable and reliable even in potentially humid industrial environments.
Optical path length for tailored performance
The optical path length, an essential parameter for CO + O2 measurements, is adaptable to the specific needs of the application. With a range from 0.5 to 10 m, theanalyser offers optimum flexibility to adjust to various configurations and installation requirements.
Standard flanges for easy integration
Integration of theanalyser into existing systems is simplified thanks to standard flanges. Options include JIS 10K, 50A, 100A, DN50/PN10, or ANSI # 150 2B, offering compatibility with different standards and industrial plant configurations.
Purge gas for a clean environment
An efficient purge system is essential to maintain optical clarity and measurement accuracy. The specific table supplied indicates the recommended purge gases, with a minimum pressure of 0.3 MPa and a flow rate of at least 20 L/min, ensuring a clean, unobstructed environment for theanalyser's operations.
Gas conditions for optimum performance
Gas conditions are decisive foranalyser performance. Compliance with datasheet, such as humidity limited to ≤50% vol (non-condensing), pressure with a tolerance of ± 10 kPa, and dust levels in line with standard or high-dust versions, guarantees optimum instrument performance.
gas analyser Laser Single Beam 1 Component
HCl
NH3
CO (High Scale)
CO (Low Scale)
CO2
CH4
O2
O2 (High Temperature)
O2 (Instrument air purge)
2-component single-beam laser gas analyser
CO + CO2
2-component dual-beam laser gas analyser
Ppm CO + O2 (Instrument Air Purge)
Ppm CO + O2 (High Temperature)
%vol CO + O2
*The measurement scales described above correspond to an optical path of 1 m.
