Online greenhouse gas flux observation system  

Measuring H2O、CxHy，COx、NOx、NH3、VOCs、SO2、H2S、CxFy、TOC、SF6、CFCs etc.

Overview 

The measurement of greenhouse gas emission flux is an important subject in atmospheric environmental science. It is the basis of studying the change trend, source and sink of greenhouse gas concentration, and is of great significance to the assessment of greenhouse gas distribution and the response to climate change. Understanding to enrage the exchange between the flux change with time, the understanding of global greenhouse gas exchange, long-term observations of different ecological system flux, in revealing the CO2 and CH4 in the atmosphere, NH3, N2O and other greenhouse gases absorb and release process, energy flow and material cycle, the surface of the interaction between the biosphere atmosphere play an important role. For example, ecological research, soil pollution detection, farmland fertilization monitoring, livestock and poultry breeding, organic manure stacking, soil greenhouse gas emissions and so on. Dkg-one series online greenhouse gas flux observation system, based on infrared photoacoustic spectroscopy technology of Finland Gasera company, has the advantages of high measurement accuracy, low detection limit, good real-time performance, in-situ on-line and efficient measurement, etc., and has become a reliable solution for on-line observation and analysis of greenhouse gas flux.

Principle

Dkg-one series of on-line greenhouse gas flux observation system is composed of a host of trace photoacoustic spectroscopy multi gas analyzer, an expandable programmable multipoint sampler, a closed soil breathing chamber, a sampling pipeline and special analysis software.

The system analysis host is based on infrared photoacoustic spectroscopy technology, has a pulse infrared light source, through narrow band optical filter, forming 10 spectral bands in the middle infrared region, for gas analysis. Ultra-high sensitivity is based on the patented optical microphone technology with enhanced cantilever beam, which can be realized through 10 kinds of optical narrowband filters. The extremely narrow optical filter can remove the interference of background gas. Multiple spectral regions can facilitate minimum cross sensitivity. Up to nine gases can be measured simultaneously

The multi-point sampler can freely extend the gas sampling point from 8 channels to 24 channels, and the instrument can be applied to the gas sampling with small flow rate and the gas sampling with high temperature. It is configured and controlled by the application software on win-pc, and the data is automatically stored in Excel format. Standard digital or analog output through different interfaces. While sampling in 12 channels simultaneously, the multi-point sampling unit can also be connected with six temperature sensors and pressure sensors to measure air temperature, surface temperature, working temperature and air pressure of the multi-point sampling unit.

Features and advantages

230 kinds of gases measurable  such as CO2、CH4、N2O、HFCs、PFCs、SF6、H2O、TOC、NH3、SO2、H2S etc.

PPB, sub-ppm level  limited detection

Instant measurement, real-time analysis, second response time

Long calibration period, low sample volume

High - resolution graphic display interface, friendly interface

Rich programmable measurement tasks

Graphs and tables show all gas measurements

Built-in trending view monitoring tasks

Statistical functions such as mean value, mean variance, maximum and minimum concentration

No consumables, maintenance free

USB connection、Ethernet、RS232、RS485 communication etc.

Rugged case design

Pipeline preheating, thermostatic measurement, prevent adsorption

Optional ac power supply, solar battery power supply

Standard 

Low voltage measurement directive 2006/95/EC and electromagnetic compatibility directive 2004/108/EC EN 50270: : 2006, EN 61000-3-2: 2006, EN 61000-3-3: 1995 + A1: 2001 + A2: 2005, EN 61010-1: 2001

Safety standard：EN61010-1 (2001), IEC 61010-1 (2001), CAN/CSA-C22.2 No. 61010-1 (2004) and UL 61010-1 (2004 incl. rev. 2005)

Specification

Response time: According to the channel integral time (C.I.T.) and gas exchange cycle, typically it takes 10s to a few minutes.  Single gas: <10s  Flush time: 6 gases(Contain water vapor)

Limited detection: according to gas component  typical sub-ppm, customizable

Repeatability: 2% of measurement result (under calibration condition)

Accuracy: typical 2~5%

Dynamic range: typical 5 orders  100,000 detection limits

Zero drift: ±2% detection limit/year

Span drift: 3% measurement value/year

Operation condition:

 temperature range: 0 °C – +45 °C

Humidity range: lower than 90% RH   no condensation

Pressure range: atmosphere

Protection grade:  IP20 (IEC 529) 

Vibration test: 33 Hz strong vibration

Storage condition: temperature range: -20 °C – +60 °C 

Analysis software: It has functions of storage, display, calculation, statistics, history playback, printing measurement curve, etc.

Sampling condition:  temperature range: 0 – +49 °C  no condensation

Pressure range: 930 mbar – 1100 mbar

Humidity range:  dew point: +8 °C or higher

Flow rate: approximately 1L/min

Sampling distance: optional pump (Negative pressure 100hPa) longest distance 300 meters

Gas connection: 6/4mm tube with quick plug, customizable

Dimension: 48.4cm Wx13.9cm Hx40.5cm D (19.1in Wx5.5in Hx16.0in D)  Analyzer host

           48.4cm Wx15.0cm Hx45 cm D   Multipoint sampler

             Closed soil breathing chamber (customizable)

Weight : approximately 13kg( analyzer host)  15kg(sampler)

Power supply: 100 - 240VAC, 50 - 60 Hz  500W/2000W  Outdoor solar power station (optional)