esis -2S tosynth TP ho ystemS le Pab ortP Your research partner for over 25 years Data Sheet Overview Since 1984, PP Systems has been recognized as a leader in the design and manufacture of photosynthesis measurement instrumentation for high level research. Currently, we have well over 1,000 portable photosynthesis systems in operation throughout the world and widely referenced in many prestigious scientific publications. 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 TPS-2 Main Console and Leaf Cuvette friendly. Although the main application for the system is leaf gas exchange, the TPS-2 main CO console can also be used as a high precision, & H O Measurement stand-alone gas analysis system for measure-The TPS-2 is a high precision instrument. It The TPS-2 system is capable of providing ment of CO2 & H2O in the lab or field. features a single, non-dispersive infrared gas control of both CO2 and H2O in a series of analyzer for accurate measurement of CO preset steps from 0 to ambient. On-board, self-Measurement Theory 2. The gas analyzer includes an infrared source, indicating desiccants are used to condition the Measurement of CO2 uptake is the most a gold plated and highly polished sample cell CO2 and H2O air. commonly used and easiest method for and detector. The analyzer acts as an absorp-determination of photosynthesis in plants. tiometer measuring only in the 4.26 µm The TPS-2 is also capable of control ing CO2 Using infrared gas analysis techniques, we can waveband ensuring accurate, rapid and stable at higher concentrations if used with an readily determine CO2 concentrations to within CO external gas cylinder. 2 results. The optical bench is thermostat-1 ppm and instantaneous, non-destructive ted and completely insulated to ensure measurements are possible. The TPS-2 accurate measurements under changing passes a measured flow of air over a leaf ambient temperatures. Our unique “Auto-Zero” sealed into a chamber called the “leaf cuvette”. facility ensures long term stability and accuracy Using a “gas switching” technique, the TPS-2 of the CO2 reading. A built-in, high precision first samples the CO2 and H2O of the air going humidity sensor measures H2O. There are no to the cuvette (reference) and then the air moving parts and all readings are corrected for leaving the cuvette (analysis). From the flow changes in temperature and pressure. rate and the change in concentrations, the assimilation rate of CO2 and transpiration rate Measurement Ranges of water can be determined. This technique is CO2: 0-2,000 µmol mol-1 (optimal) commonly referred to as the “open” system CO2: 0-9,999 µmol mol-1 (max) method of measurement and is the method employed by the TPS-2. Designed for use Self-indicating desiccants for analyzer zeroing H2O: 0-Dewpoint under the most demanding field conditions and CO2/H2O control (high temperature and humidity, dust), the For measurements at elevated CO2 concentra-system is equipped with an internal, tions, the TPS-2 is factory calibrated up to hydrophobic filtering system ensuring that all 9,999 µmol mol-1 as standard. internal parts are ful y protected. Leaf Air Supply H2O Cuvette Pump Valve CO2 Valve TPS-2 H2O Absorber Moisture Exchanger Flow CO2 Absorber Air Vent In Schematic REF/AN Zero Valve Valve H2O Sample Sensor Pump CO2 IRGA Air Out CO2 Absorber Leaf Cuvette PP Systems is recognized global y as a specialist in leaf chamber design. Al of our chambers are designed with careful y selected materials that minimize CO2 and H2O absorption/adsorption ensuring the most accurate leaf gas exchange results. The leaf cuvette is designed to couple close to the ambient. The PLC4 (B) leaf cuvette features a miniature sensor for accurate measurement of PAR (Photosynthetical y Active Radiation) and an air temperature sensor. Technical Specification Main Console Analysis Method Integral Cuvette Air Supply Unit Non-dispersive infrared, configured as an 300 cm3 min-1 measured and control ed by a absolute absorptiometer with microprocessor mass flow meter. control of linearization. Operating Environment Measurement Range 0-50o C, non-condensing. In dirty CO2: 0-2,000 µmol mol-1 (Optimal Range) environments, external air filtration is required. 0-9,999 µmol mol-1 (Max. Range) H2O: 0-75 mb Housing High impact ABS plastic case. Close-up of PLC4 (B) leaf cuvette head Corrections are made for temperature, pressure and foreign gas broadening. Dimensions Optional Light Control 29 cm W x 12.5 cm H x 20 cm D Precision (Absolute) Weight PP Systems offers an optional light unit (LED) CO2: < 1% at 300 ppm 5.2 kg. (including battery) featuring simple, manual control of cuvette light H2O: 2% at 100% RH intensity in the range of 0-2,000 µmol m-2 s-1. Leaf Cuvette Stability (CO This is particularly useful for light response Analysis) Cuvette Materials and A/Ci curves. If required, the light unit can Automatic Zero at regular intervals, corrects The materials of construction are appropriate for sample cel contamination, source and fpr the application with respect to water vapor be removed for ambient measurements. For detector ageing and pre-amplifier gain absorption, transparency and heat transfer A/Ci curves, the light source can remain at changes. properties. constant levels while CO2 can be changed independently. The light unit can be powered Control Range Stirring Fan Provides ef icient stirring of cuvette air directly by the TPS-2 (no external battery is CO2: 0-2,000 µmol mol-1 ( 6 preset levels) ensuring rapid measurement. required). H2O: 0- Dewpoint (4 preset levels) Cuvette Window Response Time 18 mm Diameter (2.5 cm2) Electrical: 0.5 seconds Display/Analog Output: 1.6 seconds Air Temperature Sensor Pneumatic: < 5 seconds (Precision Thermistor) Air Sampling Range: 0-50o C 100 cm3 min-1 using an integral DC pump. Accuracy: +/- 0.3o C at 25o C RS232 Output PAR Sensor (Cosine Corrected) Stored/current data output in standard ASCII Response: 400-700 nm A custom designed field carrying case is format at 1200 baud. Range: 0-3,000 µmol m-2 s-1 supplied with each system as standard. It has Accuracy: 10 µmol m-2 s-1 pockets to safely store/transport the TPS-2 Real Time Clock main console and leaf cuvette. Accuracy: Better than 1 min/month at 25o C. Optional Light Unit Operating Temperature: 0-70o C. LED Light Unit providing manual control of Recording Options cuvette light intensity (0-2,000 µmol m-2 s-1) By PC or by the instrument. Automatic logging at user selectable intervals controlled by internal real-time clock. PP Systems is continuously updating its products and reserves the right to amend Power Supply product specifications without notice. Internal, rechargeable 12V battery providing up to 8 hours continuous use. For Further Information, Please Contact Us At: PP Systems 110 Haverhil Rd., Suite 301 Amesbury, MA 01913 U.S.A. Tel: +1 978-834-0505 Fax: +1 978-834-0545 Email: sales@ppsystems.com URL: www.ppsystems.com 02/17/11