Worldwide supplier of underwater optical sensors since 1994
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Seapoint Turbidity Meter
Download pdf Datasheet or User Manual

FEATURES
Very low power requirements
Small size
6000 m depth capability

Optically confined sensing volume
Insensitive to ambient light

Linear output over more than 5 decades
Four programmable ranges
Optical feedback compensates for temperature coefficient
    and aging of optical components
Very low power requirements
Very low offset voltage does not require adjustment

Interfaces easily with data acquisition systems
Rugged, corrosion-free materials
Pin compatible with Seapoint Chlorophyll Fluorometer
    and Seapoint Rhodamine Fluorometer

APPLICATIONS
Profiling, Moored, Towed, or In-Line Measurements
Pollution/Runoff Monitoring
Dredging and Construction Monitoring

Water and Wastewater Quality
Sediment Transport and Settling Studies
Ocean Science and Research
Limnological Studies
Hydrothermal Vent Detection
Crude Oil Detection
Seapoint Turbidity Meter

DESCRIPTION

The Seapoint Turbidity Meter detects light scattered by particles suspended in water, generating an output voltage proportional to turbidity or suspended solids. The low power requirements make it ideal for applications where battery drain is a concern. Range is selected by two digital lines which can be hard wired or microprocessor controlled, thereby choosing the appropriate range and resolution for measurement of extremely clean to very turbid waters. The offset voltage is within 1 mV of zero and requires no adjustment across gains. The unique optical design confines the sensing volume to within 5 cm of the sensor allowing near-bottom measurements and minimizing errant reflections in restricted spaces. The sensor is easily interfaced with data acquisition packages; a 5 ft pigtail is supplied. Custom configurations are available.
 
SPECIFICATIONS

Power Requirements:
Output
Output Time Constant
RMS Noise
Output Impedance

Power-up Transient Period
Light Source Wavelength
Sensing Distance
     (from windows)
Linearity
 
Sensitivity/Range
   

      ** (output is non-linear
          above   750 FTU)
 

Temperature Coefficient
Depth Capability
Weight (dry)
Operating Temperature
Material


7-20 VDC, 3.5 mA avg., 6 mA pk.
0-5.0 VDC
0.1 sec.
< 1 mV
1000 ohms
< 1 sec
880 nm
< 5 cm (approx.)

< 2% deviation 0-1250 FTU, <5% deviation 0-1600 FTU
 
Gain
1
00x
20x
5x
1x
Sensitivity (mV/FTU)
200
40
10
2
Range (FTU)
25
125
500
4000
**

< 0.05%/C
6000 m (19,685 ft)
86 g (3.0 oz)
0C to 65C (32F to 149F)
Rigid polyurethane

 
DIMENSIONS
Schematic of Seapoint Turbidity Meter

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