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Quality Instrumentation for the Life Sciences

Effective May 1, 2016, the TPS-2 Portable Photosynthesis System is no longer available.  The good news is that it is being replaced by the new TARGAS-1 Portable Photosynthesis System which features numerous improvements including integral CO2 and H2O gas analyzers and new, sleek design.  Check out the new TARGAS-1!

TPS-2 Portable Photosynthesis System

Our TPS-2 Portable Photosynthesis System features a high technical specification at an affordable price making it an ideal choice for basic research and teaching. The system operation and setup protocol is extremely user friendly. Although the main application for the system is leaf gas exchange, the TPS-2 main console can also be used as a high precision, stand-alone gas analysis system for measurement of CO2 & H2O in the lab or field.

Measurement Theory

Measurement of CO2 uptake is the most commonly used and easiest method for determining the photosynthesis rate of plants. Using infra-red gas analysis techniques, we can readily determine CO2 concentrations to within 1 ppm (part per million) and instantaneous measurements are possible.

The TPS-2 passes a measured flow of air over a leaf sealed into a chamber called the leaf cuvette. Using a valve, the TPS-2 first samples the CO2 and H2O in the air going to the cuvette and then in the air leaving the cuvette. From the flow rate and the change in the CO2 and H2O concentrations, the assimilation rate of CO2 and the transpiration rate of water can be determined. This is commonly referred to as the “open system method of measurement”. This is the method used by the TPS-2 for CO2 measurements.

The TPS-2 is a completely self-contained unit with all the necessary pumps, flow meters and valves for measurements in the laboratory, classroom or field. Measurements can be made under ambient or changing conditions (CO2, H2O and light) for response curves. Comparative spot measurements, both inter- and intra-species, can readily be made.

The TPS-2 is supplied complete with custom carrying bag and shoulder harness for transport and use in the field.

TPS-2 Portable Photosynthesis System
LED Light Unit for TPS-2 Portable Photosynthesis System

An optional LED light unit is available for control of light intensity in the cuvette.  The picture below shows the PLC4 (B) Broad Leaf Cuvette with our optional LED light unit.

Product Features

  • Lightweight & field portable
  • Accurate CO2 and H2O measurement
  • Adjustable CO2, H2O and light for response curves
  • Simple, user-friendly operation
  • Full data logging and storage capability
  • RS232 output for data transfer to PC
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