LK-2400 Portable Soil CO2 CH4 N2O Respiration Measurement System

SPECIFICATION

LK-2400 Portable Soil CO₂ CH₄ N₂O Respiration Measurement System

The LK-2400 Portable Soil CO₂ CH₄ N₂O Respiration Measurement System is mainly used for in situ measurement of soil respiration rate, and it can also be connected to a static box to measure community photosynthesis or net exchange (NEE). Gas flux measurements usually include plant leaf-atmosphere interface gas flux measurements, soil surface-atmosphere interface gas flux measurements, and ecosystem-atmosphere interface gas flux measurements. The portable soil respiration measurement system consists of a main control module, a gas analysis module and a front-end sampling module. The main control module can integrate the analysis module, barometric pressure, temperature and humidity, GPS and other data to control the system operation status and calculate the gas flux or respiration rate according to the customer's demand. The gas analysis module is standardly equipped with a mid-infrared laser spectroscopy (MIR) analysis module, which can analyse the target gas by its superb absorption in the mid-infrared (MIR) band, and can achieve ultra-high sensitivity and accuracy monitoring within seconds. Meanwhile, the analyser is equipped with a precision temperature and pressure stabilised optical core, which provides the advantages of low-drift performance, high specificity, discriminative properties, accuracy and stability.

Technical Principles

Mid-infrared laser absorption spectroscopy (direct absorption) (MIR), dynamic closed gas chamber method

Feature

Mid-infrared laser absorption spectroscopy (direct absorption) technology, with high sensitivity；
Ultra-high stability, long-term monitoring accuracy of <0.1%.；
Autonomous, built-in calibration or zero cycle；
Acquisition frequency up to 10 Hz operation, standard 1 Hz；
Low power consumption, average power consumption 22W；
High scalability, can be attached to a variety of sensors (eg: GPS, optical radiation sensor, etc.)；
Strong operability, powerful data processing functions, able to online real-time data processing.

Technical Specifications

The LK-2400 Portable Soil CO₂ CH₄ N₂O Respiration Measurement System
	CO₂	CH₄	N₂O	H₂O
Measuring range	10 ppm ~ 10%	0-10000 ppm	0 ~ 500 ppm	0 ~ 6%
Accuracy (1s)	0.2ppm	<1ppb	0.2ppb	50 ppm
Accuracy (1min)	0.03ppm	0.3 ppb	0.05ppb	40 ppm
Accuracy (5min)	0.02ppm	0.2 ppb	0.02ppb	10 ppm
24 hours drift	0.2 ppb	2ppb	0.1ppb
minimum detectable limit	0.02ppm	0.2ppb	0.02 ppb	0.01%
calibrate	Factory calibration eliminates the need for repeat calibrations
Frequency of data acquisition	Up to 10 Hz, standard 1 Hz
sampling flow rate	Standard 1L/min, adjustable
Breathing chamber size	220 mm (D) x 120 mm (H)
Respiratory chamber volume	3140 cm³
operating method	APP
Technical Principles	Mid-infrared laser direct absorption spectroscopy (MIRLAS)
Power supply	12VDC lithium battery with 6-8 hours of continuous battery life
Ambient temperature and humidity	5 ~ 40 °C; <95% R.H, non-condensing
link method	WiFi
Positioning module	Dual-mode Beidou GPS (optional)
data computation	Yes (flux, respiration rate)
weights	<10kg
Optional Modules	Light radiation sensor, soil temperature and humidity sensor, 4G transmission module, wind speed and direction sensor, etc.
scalability	The main control board reserves a number of data transmission channels, according to customer demand for additional sensors, and synchronise the corresponding sensors for data integration.