Packages for Teaching & Research in the Biological Sciences:

Q-Box CO650 Plant CO₂ Analysis Package

The Q-Box CO650 Plant CO₂ Analysis Package has been designed for Measurements of Photosynthesis, Respiration and Transpiration in Leaves when placed in a flow-through Leaf Chamber. You can use Plant CO₂ Analysis Package in both the lab or field (with optional battery pack). When you combine Q-Box CO650 with 4 Channel Gas Switching System you can Monitor Photosynthesis, Respiration and Transpiration on upto 3 Leaves (Channel 1 is a Reference). NEW! The Q-Box CO650 has been enhanced to Include Automated Reference checking and on-the-go calculations of Photosynthesis and Transpiration Rates.

Photosynthesis and Respiration: Operation of the Q-Box CO650 Plant CO₂ Analysis Package employs the use of one Infrared CO₂ Gas Analyzer (Q-S151). The concentration of CO₂ gas entering a leaf chamber and exiting it, is measured at different times with the same analyzer. User specified control of the solenoid valve assembly switches between reference and sample measurements. When the leaf is exposed to light the difference between influx and efflux CO₂ levels (Differential CO₂), plus measurement of the gas flow through the chamber, allow automatic calculation of photosynthetic CO₂ fixation rate. Measurements of CO₂ exchange in the dark provide data of dark respiration.

Transpiration: The Q-Box CO650 includes a Humidity / Temperature sensor (Q-S161) which measures relative humidity of the air before and after it has passed through the leaf chamber. At the same time, temperature at the RH sensor is also measured. The RH differential between influx and efflux gas, the temperature, the flow rate through the leaf chamber and leaf temperature are used in automatic calculation of leaf transpiration rates.

Light and Temperature: An LED Light Source (A113) supplies photosynthetically active radiation to the leaf with minimum heat load. The LED light source can deliver approximately 1200µmol photons/m²/s at maximum output and it is supplied calibrated (in the software). As a result light intensity can be accurately set without the use of a light meter. For calculations of leaf conductance, leaf temperature measurements are required and these are obtained by the S173 Leaf Thermistor that is fitted in the bottom portion of the leaf chamber. The same thermistor can also measure air temperature inside the leaf chamber when not touching the leaf. Analog Signals from all of the sensors are converted to digital signals via Two Integrated LabQuest Mini Interfaces (6 Channels). Data is displayed, recorded and manipulated on a PC or Macintosh Computer using Logger Pro Software. Your Package comes with Customized Experimental Files for Data Collection, Automated Calculations and any further analysis.

For Multichannel Measurements of Photosynthesis and Transpiration consider adding QUBIT GAS SWITCHING SYSTEM to Q-Box CO650 Plant CO₂ Analysis Package.

1. Applications:
2. Photosynthetic CO₂ Exchange Rate Measurements
3. Transpiration Rate Measurements
4. Water Use Efficiency Studies
5. Dark Respiration Rate Measurements
6. Leaf, Root and Whole Plant Studies (with optional chambers)
7. Soil Respiration or Animal Respiration with Additional Components

1. Components:
2. Q-A101 Laboratory Stand (free standing or integrated into Q-Box)
3. A113 LED Light Source
4. Q-G267 Flow Monitor, Gas Pump × 2 (1L/min No Load)
5. G112 Flow Through Leaf Chamber
6. G122 Large Gas Bags (2)
7. Q-S151 CO₂ Analyzer (0-2000ppm) (Includes CO₂ and H₂O Scrubbers)
8. Q-S161 RH / Temperature Sensor
9. S173 Leaf Thermistor
10. C200 Digital Control Unit (DCU)
11. A381 Two Solenoid Assembly for Switching between Reference and Sample Gas
12. S181 Absolute Pressure Sensor
13. C610 Three Integrated LabQuest Mini Data Interfaces (9 Analog Channels)
14. C901 Logger Pro Software
15. C404 Customized Experimental Setup Files for collection, Display and Analysis of Data
16. Q-Box Accessory Kit (tubing, filters, connectors)
17. Rugged Water-proof case housing the sensors and analyzers
18. Manual
19. Individual Power Supplies for standalone use of the Sensors and Analyzers
20. Li-ion 3 Battery Pack (optional)

1. Q-Box CO650 Software
1. Sample of Raw Data from Spiderplant Leaf:

1. Automatic Calculations of Photosynthesis and Transpiration: