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)
0°C to 65°C (32°F to 149°F)
Rigid polyurethane

 
DIMENSIONS
Schematic of Seapoint Turbidity Meter

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