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CID - Model CI-340 -Handheld Photosynthesis Measurement System
Portable gas exchange measurement for ecology, agronomy & horticulture. Precision gas exchange analysis, modularly designed for all your in-field research needs. Real-time photosynthesis measurement of photosynthesis, respiration, transpiration, stomatal conductance, PAR & internal CO2.Crop optimization: Measure photosynthetic response to fertilization and crop management techniques.Climate & environmental research: Analyze changes in photosynthetic activity under environmental stressors such as drought, heat & contamination. Forestry applications: Gas exchange measurements of trees and soil inform understanding of forest ecosystem health.
Simultaneously measuring CO2 & H2O, light, leaf temperature, & chlorophyll fluorescence, the CI-340 can quickly do the work of multiple single-purpose devices.
Only pay for the parts you need with 10 customized leaf chamber options for varying leaf, needle & cactus sizes.
Optional control modules allow adjustment of light intensity, H2O & CO2 concentrations, temperature & chlorophyll fluorescence measurement.
The Handheld Photosynthesis System’s lightweight, but rugged construction make it ideal for in situ research.
Quickly swap out external, rechargeable 4400mAh batteries for extended in- field use, or use the AC adapter for continuous operation in a lab setting.
The infrared, non-contact temperature sensor allows for non-destructive measurement and ensures standardized measurement conditions.
- Ecologists use the CI-340 to measure seasonal changes in photosynthetic rate as a response to temperature shifts.
- Agronomists use the CI-340 to measure water status of crop plants across related genotypes.
- Horticulturalists use the CI-340 to measure changes in leaf physiology as a result of drought stress.
- Main unit: On board IRGA for C02 / H20 Analysis, H20 Analysis Flow Control, displays keyboard, leaf chamber attachment facility and battery
- Display: LCD 40 x 6 characters or 320 x 64 pixels
- Data storage: 4 MB Internal FLASH RAM
- Data output: USB
- Flow rate: 100 - 1000 cm2 /min
- Power supply: 7.2 VDC, 4400 mAh for 5 hours continuous use, extended hours of use with additional batteries. AC adapter / battery charger supplied
- Weight: 1.5 kg (3 Lbs) with battery
- Dimensions: 44 cm x 5.5 cm x 5 cm
- Operating Temperature: 0-45°C
- Operating RH: 0-90% non-condensing
- Warm-up time: Approximately 3 minutes
- Battery: 7.2 volt rechargeable Li-Ion
CO2 ANALYZER SPECIFICATIONS:
- Sensor: Low power non-dispersive infrared gas analyzer
- Chopping frequency: 1Hz
- Sensors response time: 35 seconds
- Source life: 5000 hours
- Measuring range: 0 to 2000 ppm (standard) - 0 to 3000 ppm (optional)
- Resolution: 0.1 ppm
- Repeatability: ±0.1 ppm (short term)
- Accuracy:
- Sample cell: 100 mm x 10.2 mm (3.94"L x 0.40" Dia)
- Warm-up time: Approximately 3 minutes
- Battery: 7.2 volt rechargeable Li-Ion
- Operating temperature: -5 - 45 °C
- Dimensions: 35. 5 cm x 4.5 cm x 5 cm
H20 ANALYZER SPECIFICATIONS
- Sensor type: Humidity sensitive capacitor
- Stability: Stable analyzer for accurate H20 measurements
- Measuring range: 0-100%
- Resolution: 0.1%
- Accuracy: ±2% at 10% RH, ±3.5% at 95% RH
PAR MEASUREMENT
- Sensor type: Filtered GaAsP - Photodiode:
- Measuring range: 0 - 2500 pmol m-2s-l:
- Accuracy: ±5 umol 0-2500 pmol / m2 /: sec
CHAMBER TEMPERATURE MEASUREMENT
- Sensor type: Thermocouple:
- Display: LCD 40 x 6 characters or 320 x 64 pixels:
- Measuring range: - 15~50°C:
- Accuracy: ±0.1 °C:
LEAF TEMPERATURE MEASUREMENT
- Sensor type: Infrared sensor:
- Measuring range: - 10 - 50 °C:
- Accuracy: ±0.3 °C:
Photosynthesis
Photosynthesis is the formation of carbohydrates from CO2 and a source of hydrogen (as water) in the chlorophyll-containing tissues of plants exposed to light. Photosynthetic rate is determined by measuring CO2 before and after it enters the leaf chamber to calculate the rate of CO2 assimilation by a known leaf area.
See the calculation.
Transpiration
Transpiration is the movement of water vapor from leaf tissue into the atmosphere. Transpiration rate is determined by measuring water vapor before and after it enters the leaf chamber to calculate the rate of water vapor flux per one-sided leaf area.
See the calculation.
Stomatal Conductance
Stomatal conductance refers to the openness of the leaf stomata determines the rate of CO2 assimilation into the leaf and water vapor exits the leaf through the stomata. Stomatal conductance is calculated by measuring transpiration rate as a function of leaf temperature.
See the calculation.
Open or Closed System
The CI-340 is easily operable as either an open and closed system. In open system measurement, the incoming gas is drawn from the ambient, or control-module altered, air and the exhaust returns to the external atmosphere. During closed system measurements, the air is recirculated from the exhaust back into the chamber.
See the calculation.
Absolute and Differential Readings
The CI-340 is designed to measure both absolute and differential readings. In Absolute Mode, the CI-340 measures gas concentrations from a single source. For differential measurements, the concentration of gases from both the inlet of the chamber and the chamber exhaust are measured.