Seapoint - Fluorescein Fluorometer
The Seapoint Fluorescein Fluorometer (SFF) is a high-performance, low power instrument for in situ measurements of Fluorescein. Its small size, very low power consumption, high sensitivity, wide dynamic range, 6000 meter depth capability, and open or pump-through sample volume options provide the power and flexibility to measure Fluorescein in a wide variety of conditions. The SFF uses modulated green LED lamps and a narrow-band excitation filter to excite Fluorescein. The fluorescent light emitted by the Fluorescein passes through an orange emission filter and is detected by a silicon photodiode. The low level signal is then processed using synchronous demodulation circuitry which generates an output voltage proportional to Fluorescein concentration. The SFF may be operated with or without a pump. The sensing volume may be left open to the surrounding water, or, with the use of the supplied cap, can have water pumped through it.
Two control lines allow the user to set the range to one of four options. These lines may be hardwired or microprocessor controlled to provide a suitable range and resolution for a given application. The sensor is easily interfaced with data acquisition packages; a 5 ft. pigtail is supplied. Custom configurations are available.
- Very low power requirements
- Can be used in pumped or open deployments
- Small size
- 6000 m depth capability
- Good ambient light rejection
- Linear output with Fluorescein concentration
- Four programmable ranges
- Low temperature coefficient
- Low offset voltage does not require adjustment
- Pin compatible with other Seapoint Sensors
- Interfaces easily with data acquisition systems
- Rugged, corrosion-free materials
- Profiling, Moored, Towed, or In-Line Measurements
- Dye Trace Studies
- Mixing and Dispersion Studies
- Leak and Spill Detection
- Flow Measurement
- Reverse Osmosis Recovery Measurement
Power Requirements: 8-20 VDC, 15mA avg., 27mA pk.
Output: 0-5.0 VDC
Output Time Constant: 0.1 sec.
Power-up Transient Period: < 1 sec.
Excitation Wavelength: 475 nm CWL, 30 nm FWHM
Emission Wavelength: 530 nm CWL, 30 nm FWHM
Sensing Volume: 340 mm3
Minimum Detectable Level: 0.02 µg/l
Temperature Coefficient: < 0.3%/°C
Depth Capability: 6000 m (19,685 ft)
Weight (dry): 1000 g (2.2 lbs)
Operating Temperature: 0°C to 65°C (32°F to 149°F)
Material: Rigid polyurethane
Underwater Connector: Impulse AG-306/206 (others available on request)