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Sea-Bird Scientific HydroCAT

For longterm water quality monitoring with proven anti-fouling technology

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.
  • Unattended
  • Temperature, Pressure, Dissolved Oxygen, Conductivity
  • Ideally suited for extended deployments in remote, biologically rich environments
  • SDI-12, RS-232, RS-485 (optional)
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  • 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
Sea-Bird Scientific HydroCAT Brochure
Sea-Bird Scientific HydroCAT Manual
Water Quality Solutions Overview Video
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Measured Parameters
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)
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
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)
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.
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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