【CIRAS-2 Portable Photosynthesis Measurement System】Product Features:
The CIRAS-2 portable photosynthesis measurement system is a specialized instrument for measuring parameters such as photosynthetic rate, respiration rate, transpiration rate, stomatal conductance, etc. of plant leaves and tissues. It can be used in conjunction with Hansatech's FMS pulse modulation fluorescence analyzer in the UK to simultaneously measure various parameters of photosynthesis and fluorescence, including Fo, Fm, Fs, Fo ', Fm', Fv/Fm, Φ PSII, qP, qNP, NPQ, ERT, PAR, Tl, and other fluorescence parameters.
The unique patented technology of automatic adjustment of zero drift and differential correction ensures accurate and reliable measurement results. The CIRAS-2 portable photosynthesis measurement system is a state-of-the-art photosynthetic fluorescence measurement system.
Automatically control the concentration of CO2 and H2O. Users can freely preset various programs to measure photosynthetic rates under various control conditions, as well as measure various photosynthetic response curves and initiation processes.
The blade chamber is equipped with an automatic temperature control device, which can freely control the blade temperature within the range of 8 ℃ to 40 ℃ below the ambient temperature.
Automatic light control device: PLC6 (U) is equipped with a compact plug and play LED light source, with a light intensity that can reach full day illumination (2000 μ mol m-2 s-1),
Control the light intensity freely within the range of 0-2000 μ mol m-2 s-1 through the keyboard.
The new rechargeable NiMH battery provides power for the entire system, as well as the leaf chamber light source and temperature control. Three batteries can sustain 15 hours of field operation, and the system does not need to be shut down when replacing the batteries.
Portability: The CIRAS-2 system has a compact structure and is lightweight (7.2 kg), making it easy to carry and operate in the field.
The optional soil respiration chamber can measure soil CO2/H2O flux. Equipped with a group photosynthesis chamber, it can measure the photosynthetic rate of plant populations.

【CIRAS-2 Portable Photosynthesis Measurement System】Technical Specifications:
The photosynthesis measurement system designed based on the principle of open gas path system can switch between open and closed gas paths, and use the closed gas path system to measure soil respiration rate and population photosynthesis. It can be used in conjunction with Hansatech's FMS pulse modulation fluorescence analyzer in the UK to simultaneously measure various parameters of photosynthesis and fluorescence, including Fo, Fm, Fs, Fo ', Fm', Fv/Fm, Φ PSII, qP, qNP, NPQ, ERT, PAR, Tl, and other fluorescence parameters.
2. It has four CO2/H2O infrared analysis chambers, which can simultaneously measure the concentration of reference gases CO2 and H2O, and perform differential measurement analysis of gas concentration. It is a true differential measurement infrared instrument. The infrared instrument system is designed with an automatic constant temperature device, and the temperature of the infrared chamber is maintained at 55 ℃, ensuring that the instrument is not affected by environmental temperature changes during operation.
3. CO2 measurement range: precise control and measurement within the range of 0-2000 μ mol • mol-1; The highest concentration measured reached 9999 μ mol • mol-1. The built-in CO2 cylinder provides CO2 gas, and the concentration of CO2 can be adjusted arbitrarily within the range of 0-2000 μ mol • mol-1. Alternatively, atmospheric CO2 concentration can be measured under completely natural conditions to meet the needs of multiple applications. The high concentration CO2 measurement function is particularly suitable for measuring CO2 concentration inside greenhouses.
4. H2O measurement range: 0-75 mb
5. Accuracy: 0.2 μ mol • mol-1 at CO 2:30 μ mol • mol-1;
At 1750 μ mol • mol-1, it is 0.5 μ mol • mol-1;
At 9999 μ mol • mol-1, it is 3.0 μ mol • mol-1
H2O: 0.015 mb at 0 mb;
0.020 mb at 10 mb; 0.030 mb at 50 mb
6. Automatic CO2 control range: 0-2000 μ mol • mol-1; H2O automatic control range: 0 to dew point.
7. Stability: Unique patented technology for automatic zeroing and differential balance correction. When the zero point of the instrument drifts, it automatically resets to zero
Adjustment and differential balance correction eliminate the need for manual calibration of CO2 and H2O measurements during daily measurement processes.
8. Response time: electrical signal response time 0.5s; display/output response time 1.6s; gas response time<5s.
9. Environmental probe: equipped with humidity, temperature, and light intensity probes.
10. The host is equipped with an integrated computer that can perform menu operations. The intuitive system software can display 15 measurement parameters and
Calculate parameters and display real-time measurement trace lines for four parameters simultaneously. A program can be pre-set to control light intensity, temperature, H2O and CO2 concentrations, and automatically measure various response curves.
11. Data storage: Data can be stored on integrated computers or PC memory cards.
12. User interface: A 7.2-inch 256 color large screen display that allows for the free setting of data and graphic display modes, displaying all measured parameters, calculation results, and response curve graphics.
13. Output methods: RS232 output and USB output, two data transmission methods, standard ASCII format
14. Data collection: It has manual and automatic data collection functions, and automatic data collection can be selected with an interval of 1-250 minutes.
15. Operating environment: 0-50 ℃
16. Power supply: The new 12V rechargeable NiMH battery provides power for the system to control CO2, H2O, and light intensity. Standard configuration includes 3 batteries, which can sustain 15 hours of field operation without the need to shut down the system when replacing the batteries.
17. Volume: 28 cm W × 16 cm D × 24 cm H; Weight: 7.2 Kg, lightweight, easy to carry for field testing.
18. It can be equipped with a soil respiration chamber, which is very convenient to connect with the host for measuring soil respiration rate;
19. A group photosynthesis chamber can be equipped to measure the photosynthetic rate of plant populations;
Fully automatic blade chamber:
20. It has three replaceable windows: circular (diameter 1.8 cm, area 2.5 cm2), rice leaf shaped (2.5 × 0.7 cm, area 1.7 cm2), and broad-leaved shaped (2.5 × 1.8 cm, area 4.5 cm2). Suitable for measuring blades of different shapes and sizes.
21. Leaf chamber light source: equipped with a compact and detachable LED red and white light source, powered by a 12V NiMH battery inside the host. The light intensity can reach full day illumination (2000 μ mol · m-2 · s-1). The light intensity can be freely controlled within the range of 0-2000 μ mol · m-2 · s-1 through the keyboard. Once the light source is removed, natural light can be used for measurement.
22. Leaf temperature control: It can be freely controlled within the range of 40 ℃ to 8 ℃ below atmospheric temperature.
23. Leaf chamber humidity control: The humidity can be increased or decreased freely within the range of 0 to saturation humidity.
24. Leaf chamber weight: 0.75 Kg