G2508 gas concentration analyzer measures N2O, CH4, CO2, NH3, and H2O

NegotiableUpdate on 02/24

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Overview

G2508 gas concentration analyzer measures N2O, CH4, CO2, NH3, and H2O

Product Details

The Picarro G2508 gas concentration analyzer is capable of synchronously measuring nitrous oxide (N) with a sensitivity of one billionth (ppb)2O)、 Methane (CH)4）Carbon dioxide (CO)2）Ammonia (NH)3）At the same time, measure water vapor (H) with a sensitivity of one millionth (ppm)2O) 。 For agricultural soil science, ecology, and quantitative emissions, drift can be ignored. This analyzer can operate in open or closed systems and can be easily integrated with chamber systems.

● Synchronous continuous measurement of N2O, CH4, CO2, NH3, and H2O

● Billion parts per billion (ppb) sensitivity, capable of achieving excellent rate of increase quantification

Fast response time and continuous measurement function ensure data is provided with high time resolution

Can operate in open or closed systems and easily integrate with chamber systems

● Equipped with water vapor correction function, automatically reporting dry gas mole fraction

For N2O, the accuracies at 1 minute and 5 minutes are<10 ppb='' and=''>10><5 ppb, for CH4=''>5><7 ppb='' and=''>7><5 ppb, for CO2=''>5><300 ppb='' and=''>300><200 ppb, and for NH3=''>200><3 ppb='' 'and=' '>3><1>

G2508 Performance Indicators and Performance in Air Background
specifications	N2O	CH4	CO2	NH3	H2O
Initial accuracy (1 σ)	< 25='' ppb='' +=''> Typical value=5.0 ppb*	< 10='' ppb='' +='' 0.05%=''> Typical value=0.3 ppb*	< 600='' ppb='' +=''> Typical value=240 ppb*	< 5='' ppb='' +=''> Typical value=0.16 ppb*	< 500=''>
Accuracy, 1 minute (1 σ)	< 10='' ppb='' +=''> Typical value=1.1 ppb*	< 7='' ppb='' +=''> Typical value=0.1 ppb*	< 300='' ppb='' +=''> Typical value=74 ppb*	< 3='' ppb='' +=''>< 250=''> Typical value=0.07 ppb*	< 250=''>
Accuracy, 5 minutes (1 σ)	< 5='' ppb='' +=''> Typical value=0.6 ppb*	< 5='' ppb='' +=''> Typical value=0.1 ppb*	< 200='' ppb='' +=''> Typical value=38 ppb*	< 1='' ppb='' +=''> Typical value=0.04 ppb*	< 100=''>
Ensure accuracy range	0.3–200 ppm	1.5–12 ppm	380–5000 ppm	0–300 ppb	0–3 %
measuring range	0–400 ppm	0–15 ppm	0–2 %	0–2 ppm	0–7 %
Measurement rate	< 8=''>	< 8=''>	< 8=''>	< 8=''>	< 8=''>
Gas response (Up - Down 10-90%, 90-10%)	~8 seconds	~8 seconds	~8 seconds	See the annotation below	See the annotation below
Report dry mole fraction	correct	correct	correct	deny	Not Applicable

Note: The response of H2O and NH3 is limited by their adsorption on the surface of the experimental setup. Although the analyzer will accurately measure the concentrations of NH3 and H2O inside the optical cavity, calculating the actual flux of NH3 and H2O in the soil using these measurements will become complex due to the adsorption dynamics within the system.

*The typical performance is defined as the median of the test results of 50 G2508 analyzers manufactured in sequence. Typical environmental concentration measurement values.

Specificity of the analyzer: Compared with other spectroscopic measurement techniques, Picarro CRDS technology utilizes an extremely narrow spectral region, which can significantly reduce the possibility of interference from other types of gases. However, interference may still occur in actual samples. The Picarro analyzer not only has built-in interference detection software, but also has tested and characterized the effects of the following gases on the analyzer:

Picarro G2508 Trace Interference Gas	N2O sensitivity
carbon dioxide	No automatic calibration up to 20000 ppm CO2
methane	No - can automatically calibrate up to 200 ppm CH4
ammonia	No - Automatic calibration is good, reaching 2 ppm NH3
ethane	0.2 ppb N2O / ppm C2H6 ， The highest test value is 120 ppm
ethylene	0.5 ppb N2O / ppm C2H4 ， The highest test value is 16 ppm
acetylene	Not applicable for acetylene experiment
background gas	Designed for use in ambient air, not suitable for background gases with drastic changes in composition or high-purity background gases such as N2, O2, H2, He, etc
ChemDetect ™ software	Picarro's unique algorithm detects and marks data that may be inaccurate due to spectral interference

Picarro G2508 system operating parameters	specifications
ambient temperature	10 to 35 ℃
ambient humidity	<85%>85%>
Sample pressure	300 to 1000 Torr (40 to 133 kPa)
Sample flow rate	~230 standard milliliters per minute
Sample humidity	Under non condensing conditions, with a relative humidity of less than 99%, the water vapor calibration test is conducted to a temperature of 25 ° C, which is greater than 99%
Sample pressure	300 to 1000 Torr (40 to 133 kPa)
sample temperature	-10 to 45 ℃
Optical cavity temperature control	±0.005 ℃
Optical cavity pressure control	± 0.0002 atmospheric pressure
Closed circuit/recirculation capability	Compatible with Picarro closed-loop system pump A0702
Air inlet accessories	¼ inch Swagelok ®
External dimensions	17 inches wide x 7 inches high x 17.5 inches long (43.2 x 17.8 x 44.6 centimeters), excluding 0.5 inch bracket
weight	50 pounds (22.6 kilograms)
Power requirements	100-240 volts AC; 47-63 Hz (automatic detection); At startup (total) less than 375 watts Steady state operation: 120 watts (analyzer), 150 watts (pump).
Installation form	Desktop (standard) or 19 "rack mounted chassis (optional)
attachment	Including: keyboard, mouse. Optional accessories: LCD display. Excluding: vacuum pump.
option	A0702: Picarro Closed Circuit System Pump S0528: O2 sensor, used for O2 measurement and calibration in different O2 environments S0517: Expand CH4 operating range up to 800 ppm

G2508 气体浓度分析仪测量 N2O、CH4、CO2、NH3 和 H2O

Laboratory study on a closed system chamber simulating rainfall: displaying concentration time series of N2O, CH4, and CO2 measured in dry and wet soil. After adding water, the N2O emission rate increased threefold within 2 minutes and continued to rise, while the CH4 emission rate first increased and then decreased, while the CO2 emission rate was inhibited but slowly recovered.