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TES 1339P Photosynthesis Light Quantum Meter (Measurement of Photosynthesis)
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About TES 1339P Photosynthesis Light Quantum Meter
TES 1339P Photosynthesis Light Quantum Meter ( Measurement of Photosynthesis ) is a precision instrument used to measure illuminance (lux, footcandle) and photosynthetic photon flux density (PPFD µmole/m²/s) in the field.It meets CIE photopic spectral response, f '1 ≦6%.It is fully cosine corrected for the angular incidence of light. The illuminance meter is compact, tough and easy to handle owing to its construction.The light sensitive component used in the meter is a very stable, long-life silicone photo diode and spectral response filter.U.S. Pat. No. Des. 446,135U.S. Pat. No. Des. 469,025 Specifications ●Display: Dual display 4 digit LCD reading. ●Measuring Range: -99.99, 999.9, 9999, 99990, 999900 Lux-9.292, 92.92, 929.2, 9292, 92920 fc-Autoranging (5 step) (1 fc = 10.76 Lux) ●Resolution: 0.01 Lux, 0.001 fc●Accuracy: ±3% rdg ±5dgt (Calibrated to standard incandescent lamp, 2856K) ●CIE photopic f '1: ≦6%●Temperature Characteristics: ±0.1% /℃●Measuring Rate: Approximately 5 time/sec●Data Memory Capacity: 99 sets. (Direct reading from LCD display) ●Data Logger Capacity: 40000 sets. ●Operating / Storage Conditions: 0℃ ~ 40℃
