Profiling
Natural Fluorometer System
Our natural fluorometers are integrated optical systems specifically designed to measure natural fluorescence - the fluorescence from the phytoplankton crop stimulated by available sunlight. Research conducted throughout the oceans of the world has shown that this measurement is related to photosynthetic rates and chlorophyll concentrations. Unlike strobe fluorometers, a natural fluorometer measures fluorescence emitted under the ambient light conditions that are driving photosynthesis in situ.
Key Features
- Measurement: Vertical profiles and logging of scalar irradiance (EoPAR) at depth and at the surface, upwelled (nadir) red radiance (LuChl), water temperature, and pressure/depth. Calculated values include photosynthetic rates, volume fluorescence, and chlorophyll concentration.
- Spectral Response: Scalar irradiance EoPAR with 400-700 nm spectral response. Upwelling radiance LuChl covering the chlorophyll emission spectrum, spectral response centered at 683 nm.
- Small, rugged, lightweight, battery-powered.
- Depth: 200 meters full scale, accuracy ±1% full scale (50 meter full scale available on request)
- Temperature: -5°C to 35°C, accuracy ±0.1°C, resolution ±0.03°C
- Input Power: From battery-powered deckbox (12 VDC, 6 AH rechargeable battery)
- Output Signal: RS-232, 9600 baud serial data to computer (required)
- System includes: radiometer with lowering frame, surface reference sensor, deckbox, 100 m underwater cable, 25 m surface reference cable, and data acquisition software.
Options
- NF-65 Travel Case: Fits the system with up to 100 meters of cable. Meets ATA requirements for checked baggage although system weight with cable may exceed allowable limits.
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