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In-situ Marine Optics
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In-situ Marine Optics - Model MS9 -Multispectral Light Sensor for Underwater Applications

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The MS9 is a sophisticated nine-wavelength multispectral light sensor tailored for underwater applications, particularly useful in studies involving photosynthesis. It facilitates precise monitoring of light spectra in aquatic environments, enabling detailed analysis essential for marine research. A key feature of the MS9 is its compatibility with IMOview, a user-friendly GUI software that supports real-time data visualization through serial communication, making it accessible for Microsoft Windows platforms. This device stands out in its field for providing reliable data collection in various underwater scenarios, contributing valuable insights into underwater light dynamics and enhancing the understanding of marine ecosystems.
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A nine wavelength multispectral light sensor designed for underwater applications, including photosynthesis studies.

  •  Spectrally-resolved planar irradiance or radiance sensor
  •  Integrated wiper, parking and copper componentry to minimise marine fouling
  •  User-programmable sampling with ultra low power ‘sleep’ mode
  •  Internal Real-Time-Clock and tilt sensor
  •  RS-232 telemetry port
  •  WiFi download
  •  Internal calibration coefficient storage
  •  Optional integrated pressure and temperature sensors
 

Detectors: 9 x Si photodiodes
Wavelengths (nm): 410, 440, 490, 510, 550, 610, 660, 685, 710 (factory customisable)
Spectral response: 10 nm Full-Width-Half-Maximum
Irradiance cosine response: <3% (0 – 60°)
Radiance FOV: 5° (in-air)
Calibration: NIST traceable radiometric calibration
Range: 0 – 400 µW cm-2 nm-1 (factory customisable)
Resolution (NEI): 2.5e-3 µW cm-2 nm-1

Acquisition: 9 independent 24 bit ADCs
Sampling Rate: configurable up to 5 Hz
Protocol: RS-232 (configurable baudrate)
WiFi Download: yes
Input Voltage: 7 – 24 VDC
Power Consumption: 40 mA @ 12 VDC (250 mA during wipe), 60µA sleep
Connector: Micro WET-CON MCBH6M

Length: 148 mm (connector + 36 mm)
Diameter: 67 mm
Weight: 630 g in-air, 150 g in-water
Materials: Acetal, Copper, PTFE, SS316, Quartz
Depth Rating: 300 m
Operating Temperature: -20 to +50 °C