GENEQ > Environment > Suspended Solids

Field-proven monitor of suspended solids and turbidity
Model OBS-3+

  

Probe Dimensions (including connector):
L.O.A.: 141 mm
O.D.: 25 mm
FEATURES
  • Measures turbidity and suspended solids
  • Compact low-power probe
  • Integral voltage clamp and 4–20 mA current loop
  • MCBH-5-FS, wet-pluggable connector
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    APPLICATIONS
  • River and stream gauging
  • Add-on sensor for CTDs, data loggers, and current meters
  • Monitor dredging and mining operations
  • Permit compliance
  • Control water quality in settling ponds and tanks
  • Sediment transport research
  • Laboratory measurements
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    DESCRIPTION
    The OBS®-3+ sensor measures suspended solids and turbidity by the optical backscatter method (ASTM). It features a micro-size probe that responses almost linearly over a 1,000-fold change in sediment concentration (SSC) and turbidity.

    RANGE
    Turbidity 0–2,000 NTU
    SSC* Mud 0–2,500 mg/l
    Sand 0–50 g/l
    * Ranges depend on sediment type.

    ACCURACY
    Turbidity 0.25 NTU or 1% of reading*
    Concentration Mud 0.5 mg/l or 1% of reading*
    Sand 0.25 g/l or 1% of reading*
    * Whichever is larger.

    OTHER DATA
    Output 0–1.25 V, 0–2.50 V, (4–20 mA optional)
    Maximum data rate 10 Hz
    Infrared wavelength 850 nm
    Maximum depth 500 m
    Drift < 2% / year
    Power 5 V / 12 mA
    Housing Material 316 stainless steel or titanium
    Dimensions 141 x 25 mm
    Daylight rejection –28 dB (re: 48 mW cm–2)
    Connector MCBH-5-FS, wet-pluggable