The Duke photoacoustic spectroscopy greenhouse gas analyzer reliably and automatically analyzes gases such as carbon dioxide (CO₂), methane (CH₄), and nitrous oxide (N₂O) in greenhouse gases, providing crucial monitoring and reporting data support for the implementation of global climate policies.

Research and development background and testing requirements

Global environmental challenges: Human activities such as industrial production, energy utilization, and agricultural activities release large amounts of greenhouse gases. Gas emissions from sectors such as oil and gas, coal mines, livestock and poultry breeding, and soil not only affect the environment but are also closely related to global temperature changes, environmental ecological balance, and food production capacity.

The significance of monitoring: Monitoring greenhouse gases not only improves human survival and living conditions, but also can be used to assess the extraction efficiency of oil, gas and coal mines, energy combustion efficiency, as well as soil fertility and soil quality application and many other aspects. It is an important foundation of global climate policy.

Core technological advantage

Advanced technology integration: Based on the ultra-sensitive cantilever beam enhanced photoacoustic spectroscopy detection technology, combined with the quantum cascade laser (QCL) light source, it operates in the mid-infrared fundamental spectral absorption of CO₂, CH₄ and N₂O, achieving an extremely high level of stability. The recalibration cycle can last for several months or even years, significantly reducing the overall holding cost.

Key technical configuration: Equipped with a highly sensitive patented optical cantilever microphone based on a micro-electromechanical cantilever sensor, combined with a laser interferometer to measure the microscopic movement of the cantilever. A distributed feedback quantum cascade laser is used as the light source, and the sample chamber temperature is maintained at 50°C.

01 Product Features and Performance

Convenient operation experience: Provides users with a simple and intuitive user interface, including a high-resolution display screen and a one-touch rotation button, enabling one-touch operation.

Exceptional detection capabilities: Capable of automatically analysing CH₄, CO₂, and N₂O, with detection limits as low as the low ppb level. Specifically, the detection limit for CO₂ is 2 ppb at an integration time of 120 seconds, while the detection limits for CH₄ and N₂O are both 0.1 ppb at an integration time of 120 seconds. Flexible response time, adjustable based on user-defined channel integration time (CIT) and gas purge settings, ranging from 15 seconds to several minutes. Wide dynamic range and stable operation.

Powerful functional advantages: Independent operating system, built-in gas exchange pump, no consumables or chemical reagents required, only a few millilitres of sample needed. Supports portable on-site use, built-in 2 sampling points, can be expanded to 12 points with optional multi-point sampling instrument, direct absorption measurement without drift.

Stable environmental adaptability: Operating temperature range: 0°C to +49°C, humidity requirement: no condensation, pressure range: 750 mbar to 1050 mbar, dust/water resistance rating: IP20 (IEC 529). Storage temperature range: -20°C to +60°C. Sample gas temperature range: 0°C to +49°C. Humidity: maximum relative humidity of 80% at 35°C, linearly decreasing to 35% at 49°C.

02 Application Areas

Greenhouse gas research：Used to determine carbon sources, flux emissions, etc. for greenhouse gas emissions in order to assess climate impact.

Animal management: Monitor methane, carbon dioxide, acetone and other gases emitted by livestock or individual cattle, as well as the air quality in livestock housing.

Ecological research: Suitable for lakes and marshes, ecological research, contaminated soil detection, farmland fertilisation monitoring, livestock and poultry farming, organic fertiliser storage, river and sea soil, atmospheric environment greenhouse gas emissions, and other fields.

03 Product Specifications

Appearance and installation: 19" 3U chassis, suitable for desktop or rack-mounted installation, dimensions: 48.4 cm W x 13.9 cm H x 44 cm D (19.1 in W x 5.5 in H x 17.3 in D), portable dimensions: 51.85 cm x 40.5 cm x 23 cm, weight approximately 13 kg (portable version approximately 15 kg).

Data and Storage: Built-in computer with a 7" widescreen display. Data storage is sufficient for one year of continuous monitoring at the shortest sampling interval. Total internal air path volume is 30 ml.

Power supply and interface: Input voltage: 90–264 VAC, 47–63 Hz; maximum input power: 75 W; interfaces include Ethernet and USB; optional interfaces include RS485, RS232, current output, voltage output, MODBUS, and AK protocols; supports remote control via smartphone, tablet, computer, or another DKG ONE (coming soon).

Measurement performance:Dynamic range up to 5 orders of magnitude (100,000 times the detection limit), repeatability less than 1% under operating conditions, accuracy better than 5% of calibrated concentration (limited by the accuracy of the calibration gas), excellent temperature and pressure stability, and no drift caused by changes in ambient temperature or sample pressure.

compliance standards: Complies with Low Voltage Directive 2014/35/EU, EMC Directive 2004/108/EC and ROHS 2 Directive 2011/65/EU.

With its advanced technology, outstanding performance, and wide range of applications, the Duke Photoacoustic Spectroscopy Greenhouse Gas Analyser will bring new solutions to the global greenhouse gas monitoring field, helping to address climate change challenges and promote green sustainable development.