In-situ Marine Optics
  • IMG 2889



A turbidity sensor designed for underwater applications, including integration into autonomous logging systems and vertical profiling packages.
Contact Sales


  • Suspended particulate concentration monitoring
  • Non-yellowing, scratch-resistant optics
  • Resolves 0.05 NTU, with a range of 0 – 400 NTU
  • Ships with internally stored 4 point Formazin NTU calibration
  • Anti-fouling copper face-plate and high torque wiper
  • Internal Real Time Clock, Tilt and Temperature
  • Pin-compatible with standard oceanographic equipment
  • Australian designed, manufactured, calibrated and serviced


Scattering Geometry120° nominal
Detector Si photodiode
Emitter LED 850 nm
Calibration Formazin NTU standard
Range 0 – 400 NTU (factory customisable)
Resolution 0.05 NTU
Acquisition 16 bit ADC
Sampling Rate configurable up to 10 Hz
Ambient Light Rejection yes
Protocol RS-232 @ 19,200 bps
NMEA-style output yes
Input Voltage 7 – 28 VDC
Power Consumption 10 mA @ 12 VDC (150 mA during wipe)
Analog Output 0 – 4.97 VDC, 2.2 mV RMS
Connector Micro WET-CON MCBH6M
Length 140 mm (connector + 43 mm)
Diameter 67 mm
Weight 630 g in-air, 150 g in-water
Materials Acetal, Copper, BK7 Glass, SS316
Depth Rating 300 m
Operating Temperature 0 to +50 °C



IMOview is GUI program that allows users to easily configure and display real-time data via serial communication.

Contact Sales to download the latest version.

For Microsoft Windows platforms.