OTT HydroMet

- Model HydroCAT - Field Proven Sensors For Longterm Water Quality Monitoring

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Field proven sensors measure conductivity, temperature, pressure and optical dissolved oxygen. Depending on the application, the HydroCAT can collect high quality data for up to a year. Excellent bio-fouling protection is provided by US EPA-approved anti-foulant devices, integral pump, and unique internal flow path provides stable measurements throughout a deployment.

  • Product type: Unattended
  • Parameters measured: Temperature, Pressure, Dissolved Oxygen, Conductivity
  • Product highlights: Ideally suited for extended deployments in remote, biologically rich environments
  • Interface: SDI-12, RS-232, RS-485 (optional)

  • Robust: excellent anti-fouling capability - EPA approved anti-foulant device and pumped internal flow path for maximum biofouling protection
  • Accurate: each instrument is factory calibrated in a temperature-controlled bath that operates at 2-4 times the accuracy of the instrument.
  • Cost Effective: no in-field calibrations required, common deployment duration of three plus month, reducing field costs

  • Measured Parameters:
  • Conductivity:
    • Range: 0 ... 70 mS/cm (0 ... 70,000 µS/cm)
    • Accuracy: ± 0.003 mS/cm (3 µS/cm)
    • Typical Stability: 0.003 mS/cm (3 µS/cm) per month
    • Resolution: 0.0001 mS/cm (0.1 µS/cm)
  • Temperature:
    • Range: -5 ... 45°C
    • Accuracy: ± 0.002°C / ± 0.01°C (over 35°C)
    • Typical Stability: 0.0002°C per month
    • Resolution: 0.0001°C
  • Pressure:
    • Range: 0 ... 20 m/ 0 ... 100 m/ 0 ... 350 m
    • Accuracy: ± 0.1% of full scale range
    • Typical Stability: 0.05% of full scale range
    • Resolution: 0.002% of full scale range
  • Optical Dissolved Oxygen:
    • Range: 120% of surface saturation in all natural waters
    • Accuracy: ± 0.1 mg/L (3 µmol/kg) or ± 2% whichever is greater
    • Typical Stability: < 0.03 mg/L (1 µmol/kg)/100,000 samples (20°C)
    • Resolution: 0.007 mg/L (0.2 µmol/kg)
  • Electrical:
  • Clock Stability: 5 seconds/month
  • Acquisition Time: 2.3 ... 3.2 seconds/sample (see manual)
  • Power Supply:
    • Internal: 7.8 Amp-hour (nominal) battery pack, 257 Kjoules (derated for calculations)
    • Optional External Power: 0.25 Amps at 9 ... 24 VDC
    • Power Consumption(all with pressure) *:
    • Quiescent: 0.0004 Watts
    • CTD-DO Sample Acquisition (excluding pump):: Real-time data enabled - 0.17 Watts
    • No real-time data - 0.155 Watts
    • CTD-DO Sample Waiting (not sampling, pump running, excluding pump):: Real-time data enabled - 0.056 Watts if receive line valid,
    • 0.016 Watts if receive line not valid
    • No real-time data - 0.016 Watts
    • CTD-DO Between Samples: Real-time data enabled - 0.056 Watts if receive line valid
    • 0.0004 Watts if receive line not valid
    • No real-time data - 0.0004 Watts
    • Pump: 0.12 Watts
    • Communications: 0.065 Watts
    • * Power consumption values are for standard RS-232 interface; for optional interfaces, see corresponding manual.:
  • General:
    • Housing Material: Plastic
    • Depth Rating: 350 m (1148 ft)
    • Weight: 3.4 kg (7.5 lbs) in air, 1.5 kg (3.3 lbs) in water

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