The CI-340 Handheld Photosynthesis System is a portable, single-handed tool that measures photosynthesis, respiration, transpiration, stomatal conductance, PAR and internal CO2. Light-weight and durable, the CI-340 was designed for field use. The optional accessory modules allow researchers to control CO2, H2O, temperature, light intensity, and measure chlorophyll fluorescence, while the ten different customized chambers accommodate any leaf size, including conifer needles and cacti. Direct chamber connection to the CO2/H2O gas analyzer reduces measurement delay and enables rapid measurement of gas exchange with minimal delays.
Click here for a downloadable compilation of published research.
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 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 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.
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.
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.
Glossary of Abbreviations
Main Unit
| Main Unit: | On board IRGA for CO2 Analysis, H2O Analysis with humidity sensor capacitor, Flow Control, Pump, Display and Key Board, Leaf Chamber attachment ports and Battery. |
|
| Display: | LCD 40 x 6 characters or 320 x 64 pixel | |
| Data Storage: | 4 MB Internal FLASH RAM | |
| Data Output: | USB | |
| Flow Rate: | 100 ~ 1000 cm3 / min | |
| Operating Temperature: | 0-45° C | |
| Operating RH: | 0-90% non-condensing | |
| 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 | |
CO2 Analyzer
| Sensor: | Low power Non-Dispersive Infrared Gas Analyzer | |
| Chopping Frequency: | 1 Hz | |
| Sensors Response Time: | 35 seconds | |
| Source Life: | 5,000 hours | |
| Measuring Range: | 0 to 2000 ppm (Standard) - 0 to 3000 ppm (Optional) | |
| Resolution: | 0.1 ppm | |
| Repeatability: | ±0.1 ppm (short term) | |
| Accuracy: | < ± 2% up to 2000 ppm | |
| Sample Cell: | 100 mm x 10.2 mm (3.94” L x 0.40” Dia) | |
H2O Analyzer
| Sensor Type: | Humidity Sensitive Capacitor | |
| Stability: | Stable Analyzer for accurate H20 measurements | |
| Measuring Range: | 0 to 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 µmol m-2s-1 | |
| Accuracy: | ±5 µmol 0-2500 µmol / m2 / sec | |
Chamber Temperature Measurement
| Sensor Type: | Thermocouple | |
| Display: | LCD 40x6 characters 320x64 pixel | |
| 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 | |
To measure photosynthetic activity, simply secure a leaf within the CI-340 chamber to measure leaf gas exchange under ambient conditions or in a closed system. Data is available in moments as the CI-340 sensors work together to record and calculate gas exchange according to customizable research parameters.
Adding control modules to the CI-340 enables complete environmental control in field or lab settings, where CO2, H2O, light and temperature can be altered to measure plant response.
CI-340 Use Case w/ Dr. Olyssa Starry
The CI-340 Handheld Photosynthesis System includes:
Optional Control Modules:
Optional Leaf and Soil Respiration Chambers available on accessory page.
To translate, click the gear icon, choose Subtitles -> English, then go back to gear icon, choose Subtitles -> Autotranslate and pick your language
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 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 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.
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.
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.
Glossary of Abbreviations
Main Unit
| Main Unit: | On board IRGA for CO2 Analysis, H2O Analysis with humidity sensor capacitor, Flow Control, Pump, Display and Key Board, Leaf Chamber attachment ports and Battery. |
|
| Display: | LCD 40 x 6 characters or 320 x 64 pixel | |
| Data Storage: | 4 MB Internal FLASH RAM | |
| Data Output: | USB | |
| Flow Rate: | 100 ~ 1000 cm3 / min | |
| Operating Temperature: | 0-45° C | |
| Operating RH: | 0-90% non-condensing | |
| 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 | |
CO2 Analyzer
| Sensor: | Low power Non-Dispersive Infrared Gas Analyzer | |
| Chopping Frequency: | 1 Hz | |
| Sensors Response Time: | 35 seconds | |
| Source Life: | 5,000 hours | |
| Measuring Range: | 0 to 2000 ppm (Standard) - 0 to 3000 ppm (Optional) | |
| Resolution: | 0.1 ppm | |
| Repeatability: | ±0.1 ppm (short term) | |
| Accuracy: | < ± 2% up to 2000 ppm | |
| Sample Cell: | 100 mm x 10.2 mm (3.94” L x 0.40” Dia) | |
H2O Analyzer
| Sensor Type: | Humidity Sensitive Capacitor | |
| Stability: | Stable Analyzer for accurate H20 measurements | |
| Measuring Range: | 0 to 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 µmol m-2s-1 | |
| Accuracy: | ±5 µmol 0-2500 µmol / m2 / sec | |
Chamber Temperature Measurement
| Sensor Type: | Thermocouple | |
| Display: | LCD 40x6 characters 320x64 pixel | |
| 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 | |
To measure photosynthetic activity, simply secure a leaf within the CI-340 chamber to measure leaf gas exchange under ambient conditions or in a closed system. Data is available in moments as the CI-340 sensors work together to record and calculate gas exchange according to customizable research parameters.
Adding control modules to the CI-340 enables complete environmental control in field or lab settings, where CO2, H2O, light and temperature can be altered to measure plant response.
CI-340 Use Case w/ Dr. Olyssa Starry
The CI-340 Handheld Photosynthesis System includes:
Optional Control Modules:
Optional Leaf and Soil Respiration Chambers available on accessory page.
To translate, click the gear icon, choose Subtitles -> English, then go back to gear icon, choose Subtitles -> Autotranslate and pick your language
The CI-340 Handheld Photosynthesis System is a portable, single-handed tool that measures photosynthesis, respiration, transpiration, stomatal conductance, PAR and internal CO2. Light-weight and durable, the CI-340 was designed for field use. The optional accessory modules allow researchers to control CO2, H2O, temperature, light intensity, and measure chlorophyll fluorescence, while the ten different customized chambers accommodate any leaf size, including conifer needles and cacti. Direct chamber connection to the CO2/H2O gas analyzer reduces measurement delay and enables rapid measurement of gas exchange with minimal delays.
Click here for a downloadable compilation of published research.
"The CI-340 portable photosynthesis system was fully useful in greenhouse conditions and the results helped us to answer for some of our questions. The measurements were easy and relatively fast in comparison to other analytical methods."
