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.
Exploring the Boreal Forest: How The Ridges Sanctuary Uses the CI-110 Plant Canopy Imager for Critical Ecological Research
In the heart of Door County, Wisconsin, The Ridges Sanctuary stands as a vital steward of one of the most biodiverse regions in the Midwest. This sanctuary, the first and oldest private land trust in Wisconsin, has been preserving its land since 1937. Under its care are 1,700 acres of boreal forest, a unique paleo… Continue reading…
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The CI-710s Leaf Spectrometer: A Researcher’s Perspective
In a recent discussion with Scott Trimble, Vice President of Marketing for Felix Instruments, researchers Saroj Burlakoti and Anju Chaudhary from Utah State University shared their experiences using the CI-710s Leaf Spectrometer. The conversation highlighted the instrument’s critical role in their research, focusing on ornamental plants, water conservation, and fertilizer reduction. This article summarizes the… Continue reading…
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Comparing the Usability Between CID Bio-Science’s CI-600 Root Imager and an Inexpensive Endoscope
In the evolving field of agriculture, our tools can significantly influence the outcomes of our research and farming practices. Recently, a comparative study was undertaken to analyze the usability of the CID Bio-Science’s CI-600 Root Imager against a more budget-friendly option, the Depstech ds450 endoscope. Here, we delve into the findings presented in a poster… Continue reading…
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Challenges of Cold Stress in Rice: the Impact of Technology
A team of dedicated scientists led by Árpád Székely, Tímea Szalóki, Mihály Jancsó, János Pauk, and Csaba Lantos set out to understand the effects of cold stress on rice seedlings. The challenge was significant. Cold stress is a major factor affecting the growth and productivity of rice, a staple food for more than half of… Continue reading…
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Teaching with plant science tools
Kim Collins and her team at Northport High School have been utilizing the CI-710s SpectraVue Leaf Spectrometer to lend a modern, data-driven approach to students’ research projects. In this interview, we dive into how this technology-forward curriculum is empowering the next generation of plant science researchers and explore two unique student-led projects using Spectravue.
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Exploring root growth and development in HLB-affected citrus trees
Fifteen years of citrus greening disease (HLB) has had a devastating effect on Florida’s citrus industry, but the work of Dr. Lorenzo Rossi and his team is aiming to turn that around and making great strides using the CI-602 Narrow Gauge Root Imager.
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Bringing new crops to light by looking below ground
The CI-600 In-Situ Root Imager allows Dr. Shinsuke Agehara and his team at University of Florida to develop a holistic understanding of established and emerging crops in Florida—from the ground, up.
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Peering into plant pigmentation
Using the CI-710s SpectraVue Leaf Spectrometer, Dr. Catherine Simpson and her research team at Texas Tech University are gaining a deeper understanding of the nutritional and physiological qualities of various edible flowers and leafy vegetables over time.
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Data-driven assessment of plant response
Using the CI-340 as an integral part of their robust testing platform, Stephanie Wedryk and her team at Rx Green Technologies are able to develop groundbreaking cultivations solutions for the commercial cannabis industry.
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Modeling ecosystem functioning with precise plant data
In conjunction with LECA, PhyloAlps Project and Swiss Federal Research Institute, Amélie Saillard and her team use the CI-202 Portable Laser Leaf Area Meter to measure functional traits throughout the Alps, gathering vital information on each of the nearly 3500 alpine vegetal species.
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Designing complex orchard systems with user-focused technology
As a Senior Agronomy Scientist at Mars inc., Rany Agustina Susanti and her team extensively used the CI-110 Plant Canopy Imager in their work to improve efficiency of high productivity cacao farms using orchard intensive cropping systems.
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Endless measurement possibilities
With 10 available chamber options designed to accommodate any leaf size, including conifer needles and cacti, the CI-340 can be applied effectively in virtually any photosynthesis study.
Lightweight, rugged construction
Designed for field studies, the Handheld Photosynthesis System’s portability and durability make it ideal for in situ research.
Infrared leaf temperature sensor
The non-contact temperature sensor allows for non-destructive measurement and ensures standardized measurement conditions.
Modular design
With 10 customized leaf chamber options and 4 control modules, the CI-340’s modular design means you only pay for the parts you need.
Open or closed system measurements
Capable of running open or closed system analysis depending on your study needs.
External battery pack
Achieve virtually unlimited battery life in the field with external, rechargeable 4400mAh batteries or use the AC adapter for continuous operation in a lab setting.
More than 300+ published
research papers
on photosynthesis monitoring
Request a live demonstration
Precise, in situ photosynthesis measurement
Measure multiple factors simultaneously
Simultaneously measuring CO2 & H2O, light, leaf temperature, & chlorophyll fluorescence, the CI-340 can quickly do the work of multiple single-purpose devices.
Accommodate any leaf
Only pay for the parts you need with 10 customized leaf chamber options for varying leaf, needle & cactus sizes.
Control your experiment
Optional control modules allow adjustment of light intensity, H2O & CO2 concentrations, temperature & chlorophyll fluorescence measurement.
Designed for the field
The Handheld Photosynthesis System’s lightweight, but rugged construction make it ideal for in situ research.
Virtually unlimited battery life
Quickly swap out external, rechargeable 4400mAh batteries for extended in- field use, or use the AC adapter for continuous operation in a lab setting.
Specially designed leaf temperature sensor
The infrared, non-contact temperature sensor allows for non-destructive measurement and ensures standardized measurement conditions.
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Does this product come with a warranty?
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All CID instruments come with a 12-month warranty from the point of sale. The warranty covers repairing and replacing defective parts of the instrument that were manufactured directly by CID Bio-Science. The warranty does not cover wear and tear, neglect, misuse, accident, or excessive deterioration. Further, repair and alteration by an unauthorized party voids the warranty. More information can be found in the operation manual of your instrument.
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Is the CI-340 waterproof?
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The CI-340 is not designed to be waterproof and should not be used underwater. The CI-340 is designed to be water-resistant. Use in light rain is fine, however, there are electronics that can be damaged from water entering the instrument, so it is not recommended to use the CI-340 during heavy rainfall.
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What are the operating conditions of this product?
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The operating conditions of the CI-340 are 0-45° Celsius and 0%-90% noncondensing humidity.
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What different types of researchers use the Handheld Photosynthesis System?
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Crop, forestry, environmental, plant, climate, hydrology, and soil researchers all benefit enormously from the metrics that the Handheld Photosynthesis System provides.
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How much does the device weigh?
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The Handheld Photosynthesis System weighs 1.5kg (3lb) with battery.
Have additional questions?
Click the link below to speak with one of our staff scientists about your specific application.
Specifications
| Device | 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. |
| Imaging Probe and Arm Weight | 1.5 kg |
| 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 |
| Accuracy | ±0.1°C |
| Measuring Range | -15~50°C |
Leaf Temperature Measurement
| Sensor Type | Infrared Sensor |
| Measuring Range | -10 ~ 50°C |
| Accuracy | ±0.3˚C |
Theory of operation
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.
Glossary of Abbreviations
CI-340 Handheld Photosynthesis System Training
Get to know the CI-340 Handheld Photosynthesis System
Dr. Olyssa Starry on Research at Portland State University Using CI-340 Photosynthesis Analyzer
Shedding a Light on Photosynthesis
Accurate and portable gas exchange on the go
Compact and durable, this single-handed tool measures photosynthesis, respiration, transpiration, stomatal conductance, PAR and internal CO2, all in one easy to carry unit.
Control Modules
Our control modules expand the use of the CI-340 Photosynthesis System to enable users to modify light intensity, adjust temperature, manipulate CO2 and H2O concentrations, and measure chlorophyll fluorescence.
CI-301LA Light Control Module
The Light Module allows researchers to adjust the light intensity received by the leaf in the chamber.
CI-301AD CO2 and H2O Control Module
The H2O & CO2 Control Module enables researchers to set or adjust the CO2 and H2O concentrations in the chamber in order to investigate related physiological changes.
CI-510CS Temperature Control Module
The Temperature Control Module allows researchers to adjust the temperature in the chamber to evaluate fluctuations in the rate of photosynthesis relative to high or low temperatures.
CI-510CF Chlorophyll Fluorescence
The Chlorophyll Fluorescence Module measures fluorescence simultaneously with photosynthesis to provide researchers with information about changes in photosynthesis efficiency and heat dissipation from a leaf.
CI-340BP Battery Pack
Includes one rechargeable battery, universal battery charger, cable connections for up to 4 modules, and instrument bag.
Leaf Chambers
Our customized leaf chambers maximize the amount of leaf area enclosed in the sample chamber, giving the most accurate representation of whole leaf photosynthetic rate.
LC-1 Square Leaf Chamber
For open-system measurements of trees, shrubs and herbs with small, broad leaves.
25 mm x 25 mm
LC-2 Wide Rectangular Leaf Chamber
For open-system measurements of trees, shrubs and herbs with small, regular leaves.
(55 mm x 20 mm)
LC-3 Narrow Rectangular Leaf Chamber
For open-system measurements of grasses and grass-like leaves.
(65 mm x 10 mm)
LC-4 Small Cylindrical Leaf Chamber
For open-system measurements of succulents and small-needled conifers.
(25 mm x 90 mm)
LC-5 Large Cylindrical Leaf Chamber
For open-system measurements of large-needled conifers.
(50 mm x 70 mm)
LC-7 1/4 Liter Leaf Chamber
For closed-system measurements of long, narrow leaves.
(104 mm x 33 mm x 73 mm)
