Detail Underwater Spherical Quantum Sensor, Model : LI-193, Brand : LI-COR
The LI-193 Underwater Spherical Quantum Sensor gives an added dimension to underwater PAR measurements as it measures photon flux from all directions. This measurement is referred to as Photosynthetic Photon Flux Fluence Rate ( PPFFR) or Quantum Scalar Irradiance. This is important, for example, when studying phytoplankton, which utilize radiation from all directions for photosynthesis.
The LI-193 features a high sensitivity optical design and compact, rugged construction ( 3400 kPa, 350 meters depth, 3400 kPa = 493 psi) .
Specifications
Absolute Calibration: ± 5% in air traceable to NIST.
Sensitivity: Typically 7 µ A per 1000 µ mol s-1 m-2 in water.
Linearity: Maximum deviation of 1% up to 10, 000 µ mol s-1 m-2.
Stability: < ± 2% change over a 1 year period.
Response Time: 10 µ S.
Temperature Dependence: ± 0.15% per ° C maximum.
Angular Response: < ± 4% error up to ± 90° from normal axis ( see Angular Response chart) .
Azimuth: < ± 3% error over 360° at 90° from normal axis.
Detector: High stability silicon photovoltaic detector ( blue enhanced) .
Sensor Housing: Corrosion resistant metal for both saltwater and freshwater applications with an injection molded, impact resistant, acrylic diffuser. Units have been tested to 500 psi ( 3400 kPa, 350 meters) with no failures.
Size
Globe: 6.1 cm Dia. ( 2.4” ) .
Housing: 3.18 cm Dia. ( 1.25” ) .
Overall Height: 10.7 cm ( 4.2” ) .
Weight: 142 g ( 0.31 lbs.) .
Mounting: Three 6-32 mounting holes are tapped into the base for use with the 2009S Lowering Frame or other mounting devices.
Cable: Requires 2222UWB Underwater Cable.
