Handheld Photosynthesis System (CI-340)

Measures photosynthesis, respiration, transpiration, stomatal conductance, PAR etc

Measures photosynthesis, respiration, transpiration, stomatal conductance, PAR etc


Product Details

The CI-340 is a field ready, portable, and lightweight photosynthesis analyzer. This gas exchange system is easy to operate in the lab or the field, in any conditions. The CI-340 comes ready to take ambient measurements of gas exchange right out of the case. Optional environmental modules allow the researcher to control CO2, H2O, temperature, and light, as well as measure chlorophyll fluorescence and photosynthesis rates simultaneously.



  • Lightest Photosynthesis System for scientific research at 1.5kg
  • Measures photosynthesis, transpiration, stomatal conductance, and internal CO2 concentration in open or closed environments
  • Control heat, light, water and gas exchange for precise data
  • 9 custom chambers suiting any application, including conifer needles
  • Soil Respiration Chamber available


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 cm2 / 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 1Hz
Sensors Response Time 35 seconds
Source Life 5,000 hours
Measuring Range 0 to 2000 ppm (Standard) - 0 to 3000 ppm (Optional)
Resolution 0.1ppm
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 / m/ 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



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