- An entire photosynthesis system in one hand-held case
- Lightweight and truly portable
- Stable analyzer for accurate CO2 and H2O measurements
- Open and closed system measurements
- 9 interchangeable chambers for different types of leaves
- Soil respiration chamber and plant canopy attachment available
- Modular attachments include light, temperature control, CO2 / H2O supply and chlorophyll fluorescence measurement
- Automatically controls light, temperature, and CO2 / H2O concentrations in the leaf chamber
- Infrared non-contact leaf temperature measurement
- Measures chlorophyll fluorescence and photosynthesis simultaneously
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The entire CI-340 Handheld Photosynthesis System display,
keypad, computer, data memory, CO2/H2O gas analyzer,
flow control system, and battery - is contained in a single
hand-held case. It has everything you need to measure
photosynthesis, transpiration, stomatal conductance, and
internal CO2 concentration, as well as many other factors.
Because the chamber is connected directly to the CO2/H2O
differential gas analyzer, there is virtually no time delay
when measuring CO2/H2O in the chamber. With CID’s carbonate
injection CO2/H2O generator module, the CI-340 can
precisely control CO2 and H2O concentrations in the leaf
chamber.
The CI-340 can also control temperature and light intensity
with the optional temperature and light control modules.
Furthermore, a chlorophyll fluorescence module can be attached
to the CI-340 to simultaneously measure photosynthesis
and chlorophyll fluorescence.
Available Modules:
- Temperature
- CO2
- Luminescence
- Chlorophyll Fluorescence
- Soil Respiration
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The CI-340 includes:
- Includes infrared gas analyzer
- PAR sensor
- Air temperature sensor
- Choice of one leaf chamber
- An infrared non-contact leaf temperature sensor
- Soda Lime tube
- Silica Gel tube
- Spare parts kit
- Rechargeable battery
- Battery charger
- RS232 communication cable
- Communication software
- Operation manual
- Hard-shell instrument carrying case
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This self-contained system does the work of instruments
many times its size. The CI-340 measures
various aspects of photosynthetic activity
within a completely controlled environment— while in the field. The CI-340 creates its own
environment to study plant activity, employing
varied control factors including CO2 levels,
luminescence, and temperature all in solidstate
instrument you can carry in one hand. To
measure photosynthetic activity, simply secure
a leaf within the CI-340 chamber and choose
“ambient” or “closed” system measurement. In
moments leaf function data is available as the
CI-340 analyzes photosynthesis according to
your research parameters.
Also available for the CI-340: Soil Respiration
attachment for measuring changes in soil. |
1. 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. The rate at which photosynthesis
occurs is determined by measuring the rate at
which a known leaf area assimilates the CO2 concentration
in a given time.
2. It is known that transpiration is the primary determinant
of leaf energy balance and plant water status.
The rate of transpiration is determined by the
accumulation of water vapor flux per one-sided
leaf area in a given time.
3. Stomatal conductance is the water loss of a leaf’s
conductance considered in parallel or series. It can
be obtained by measuring the transpiration and
leaf surface temperature (°C), and applying the
calculation.
4. The CI-340 is designed so that measurements can
incorporate both absolute and differential readings,
simultaneously. This instrument can also
be configured to operate both open and closed
systems.
5. CI-340 measures CO2 gas concentration in the
Absolute Mode from a single CO2 source. The
CI-340 acquires absolute measurement both from
chamber environment and inlet to the instrument.
This concept adapts to both the open and closed
system chamber environments unlike any other
Handheld Portable Photosynthesis Systems available
in the market today.
* Please see corresponding equations |
| Main System |
| Main Unit |
On board IRG A for CO2 / H2O
Analysis, Flow Control, Display and
Key Board, Leaf Chamber attachment
facility and Battery |
| Display |
LCD 40 x 6 characters or 320 x 60
pixel |
| Data Storage |
4 MB Internal FLASH RAM |
| Data output |
USB or RS232C PC Link Cable |
| Flow Rate |
100 ~ 1000 cm2 min-1 (1 lpm) |
| Power supply |
7.2 VDC, 3.2 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 |
| Dimension |
450 mm x 53 mm x 48 mm |
| CO2 Analyzer |
| Sensor |
Low power Non-Dispersive Infrared
Gas Analyzer d; No sensitivity to
motion, Stable analyzer for accurate
CO2 and H2O measurements |
| Chopping frequency |
1Hz |
| Data Storage |
4 MB Internal FLASH RAM |
| 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 |
< ± 2% up to 3000 ppm |
| Sample cell |
100 mm x 10.2 mm (3.94” L x 0.40” Dia) |
| Warm- up time |
Approximately 3 minutes |
| H2O Analyzer |
| Sensor |
Humidity Sensitive Capacitor
Stable Analyzer for accurate H2O
measurements |
| Measuring Range |
0 to 100% |
| Resolution |
0.1% |
| Accuracy |
±2% at 10% RH, ±3.5% at 95% RH |
| Response Time |
<15 sec |
| PAR Measurement |
| Sensor Type |
Filtered GaAsP - Photodiode |
| Measuring Range |
0 ~ 2500 μmol m-2s-1 |
| Accuracy |
±5 μmol m-2s-1 |
| Response |
400 ~ 700nm |
| Chamber Temperature Measurement |
| Sensor Type |
Precision Thermistor |
| 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 |
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