The TMD-90 Turbidity Monitoring Device has been designed specifically for measurement of turbidity (NTU) in water. The TMD-90 has been constructed using technology of the DECKMA HAMBURG OMD series industrial instruments and 15ppm Bilge Alarm Monitors, that have a specification and performance which exceeds the requirements of the International Maritime Organization specifications for 15ppm Oil-in-Water Monitors contained in Resolution MEPC. 107 (49). The TMD-90 unit is supplied with 2 works-adjusted alarms at 50 NTU. Other set points are possible (e.g. 200 NTU) and can be adjusted on site at any time by using the buttons at the front panel.