To address the spatiotemporal variability of soil gas flux, LICA has developed a new multi-channel, automatic soil gas flux measurement system, the SF-3500. The SF-3500 can be connected to various greenhouse gas analyzers and stable isotope analyzers to measure the fluxes of multiple gases in soil. It can also enable the sequential switching of multiple flux chambers for measurement, allowing for long-term and continuous monitoring of multi-point soil gas flux.It can connect numerous analyzers to measure multi-parameter flux synchronously, thereby reducing the system error associated with multi-system measurements. In addition, an LCD touchscreen and an Android mobile phone app are added for control and display, eliminating the need for computer settings and a separate display. The SF-3500 remote control and data transmission functions make instrument maintenance easier and simpler, making it more suitable for long-term field measurements. After long-term testing and verification, the SF-3500 demonstrates improved accuracy and stability, making it an ideal choice for prolonged field use.

Main Features

• The system enables multi-point, continuous, unattended, long-term monitoring of soil greenhouse gas flux, and supports connection with up to 18 soil flux chambers

• Optional soil emission measurement for N2O, CH4 , CO2 , NH3 , OCS, CO2 isotopes, N2O isotopes, and other gases, and is compatible with various NDIR and laser-based gas analyzers from different manufacturers

• Customizable chamber options for diverse applications, including transparent chambers, open-top chambers, underground chambers, and water surface chambers

• The system is rugged and reliable, capable of stable operation in harsh environments and extreme weather conditions

Specifications

u  SF-3500 multiplexer

Number of Chamber Interfaces： 9 / 18

Storage media：SD card

Operation Condition：Temperature -20~60℃

                                    Humidity: 0~95% RH (No condensation)

u  LI-G3001 Greenhouse Gas Analyzer

Measurement principle：CRDS

Simultaneous measurement (CH4, CO2, H2O)

Accuracy (1δ, 1 sec / 10 sec)

CH4          <4ppb / <1.2ppb

CO2          <0.5ppm / <0.15ppm

H2O          <100ppm

Measurement range

CH4            0-100ppm

CO2            0-10000ppm

H2O            0-3%

Environmental  Conditions

Operating temperature：-20-40℃

Dimensions：56 x 36 x 19 cm

Weight：9 kg

u  LI-G3006 Portable N2O/CO2 Analyzer

Measurement principle：TDLAS

Simultaneous measurement (N2O, CO2)

N2O：< 200 ppt/s 

CO2：< 440 ppb/s 

Sensitivity (1σ) @5 Hz

N2O：< 95 ppt/s

CO2：< 200 ppb/s

Measurement range

N2O：2 ppb - 500 ppm

CO2：10 ppm - 100,000 ppm

Environmental  Conditions

Operating temperature：10-35℃

u  SC-22 Automated Soil Flux ChamberSize

Measurement Area： 276.27(cm²)                 

Volume of air chamber：2943.8(cm³)

Cable length：15m

Operation temperature: -20-60℃    

Pump：3.5L/min            

Dimensions：55 x 28 x 32 cm

u  Ordering Information

SF-3500-9: 9-channel soil flux measurement system console, standard 2G SD card 1 (excluding measurement chamber) 

SF-3500-18: 18-channel soil respiration measurement system console, standard 2G SD card 1 (excluding measurement chamber) 

SC-22: Fully automatic soil flux measurement chamber, Pneumatic version, standard 15-meter tubing kit, and one soil collar. 

HydraProbe: Soil temperature and humidity sensor

Support: Provide technical support and service for life

Manufacturer: LICA, China