Designed primarily as a photosynthesis system for teaching, this lower cost analyser calculates all the usual parameters and features a cuvette (including light unit) for working on a wide variety of leaf types.

The "open system method of measurement “ 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, flowmeters 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.

Technical Specifications

• Analysis Method
  Non-dispersive, single cell infra-red gas analyser with microprocessor control and linearisation.Thermostated for temperature correction and fully pressure compensated.
• CO₂ Measurement Range
  0-2,000 ppm CO2
  Precision=< 1 ppm at 300 ppm
• H₂O Sensor Range
  0-100% RH (Vaisala)
  Accuracy =< 3% at 50% RH
  Precision =< 1% RH
• Internal Air Sampling Pumps
  Sample Pump   Controlled at 200 ml min-¹
  Air Supply Pump  Controlled at 300 ml min-¹
• Calculated Parameters
  Assimilation (photosynthesis / respiration), Transpiration, Stomatal Conductance, Sub-stomatal CO₂ Leaf Temperature.
• RS232 Output
  Stored/current data output in standard ASCII format.
• Data Storage
  Full data logging capability (32K internal battery backed RAM).
• Power Supply
  12V 7.0 Ah rechargeable lead acid battery. Supplied with battery charger
• Case Dimensions
  290mm W x 199mm D x 110mm H
• Weight
  5.0 kg (including battery).
• PLC(Universal) Leaf Cuvette
• Window Area
  45 mm x 25 mm (11.25 cm²)
• Stirring Fan
  Provides efficient stirring of cuvette air ensuring rapid measurement
• Air Temperature Sensor
  Range=0-60°C
  Software linearisation=±0.10°C to +60°C
  Accuracy =±0.3°C at 25°C
• PAR Sensor  
  Filtered Silicon Cell (fully cosine corrected)
  Response =400-700 nm
  Precision=15 µmol m-² s-¹
• Light Control
  Fan cooled white light unit provides manual control of light (0-1,500 µmol m-² s-¹).Supplied with gauze filters and diffuser.
• Dimensions
  250 mm L x 50 mm W
• Weight
  525 grams.

More about TPS-2