Water Quality & Water Level Data Loggers

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Onset offers a range of research-grade data loggers for measuring water quality parameters in lakes, streams, and oceans.

  • Research-grade quality provides years of reliable performance
  • Simple operation makes deployment in lakes, streams, and oceans fast
  • Low-cost helps maximize spatial coverage
  • HOBOware software makes it easy to integrate and analyze data from multiple loggers
  • Optional waterproof data shuttle provides safe and convenient data offload
Water Quality Managment

Results: 1 to 21 of 21



HOBO Dissolved Oxygen Logger - U26-001
  • Supported Measurements:
    Temperature, Dissolved Oxygen
  • Range: DO: 0 to 30 mg/L - Temp: -5 to 40°C (23 to 104°F) ; non-Freezing
  • Accuracy: DO: 0.2 mg/L up to 8 mg/L; 0.5 mg/L from 8 to 20 mg/L - Temp: 0.2°C (0.36°F)

$1,250
HOBO Dissolved Oxygen Logger - U26-001



HOBO Conductivity Data Logger - U24-001
Fresh Water
  • Supported Measurements:
    Temperature, Conductivity/Salinity
  • Range: Calibrated Conductivity: Low Range: 0 to 1,000 µS/cm; Full Range: 0 to 10,000 µS/cm
    Temperature: 5 to 35C (41 to 95F)
  • Accuracy: Conductivity: 3% of reading, or 5 uS/cm, whichever is greater
    Temperature: 0.1C (0.2F)

$750
HOBO Conductivity Data Logger - U24-001



HOBO Conductivity Data Logger - U24-002-C
Salt Water
  • Supported Measurements:
    Temperature, Conductivity/Salinity
  • Range: Calibrated Conductivity: Low Range: 100 to 10,000 uS/cm; High Range: 5000 to 55,000 uS/cm
    Temperature: 5 to 35C (41 to 95F)
  • Accuracy: Specific Conductance Accuracy:(in Calibrated Range using Conductivity Assistant and Calibration Measurements)

    Low Range: 3% of reading or 50 µS/cm, whichever is greater
    High Range: 5% of reading, in waters within a range of
    ±3,000 µS/cm; waters with greater variation can have substantially greater error (see Plot C)


$750
HOBO Conductivity Data Logger - U24-002-C



TidbiT v2 Water Temperature Data Logger - UTBI-001
Max Depth 1,000 ft
  • Supported Measurements:
    Temperature, Water Temp
  • Range: -20° to 70°C (-4° to 158°F) in air;
    -20° to 30°C (-4° to 86°F) in water
  • Accuracy: ±0.2°C @ 25°C (0.36°F @ 77°F)

$133
TidbiT v2 Water Temperature Data Logger - UTBI-001



HOBO Water Temperature Pro v2 Data Logger - U22-001
Water Temperature (400 ft.)
  • Supported Measurements:
    Temperature, Water Temp
  • Range:
    -40° to 70°C (-40° to 158°F) in air
    -40° to 50°C (-40° to 122°F) in water
  • Accuracy: ±0.21°C from 0° to 50°C (±0.38°F from 32° to 122°F)

$129
HOBO Water Temperature Pro v2 Data Logger - U22-001



HOBO U12 Deep Ocean Temperature Logger - U12-015-03
  • Supported Measurements:
    Temperature, Water Temp
  • Range:
    Temp: -40° to 125°C (-40° to 257°F)"
    Depth: 11,000 m (36,080 ft)
    Pressure: 1110 bar (16,000 psi)
  • Accuracy: ±2 minute per month at 25°C (77°F)

$799
3 week lead time
HOBO U12 Deep Ocean Temperature Logger - U12-015-03



HOBO U20 Water Level Data Logger - U20-001-01
30-Foot Depth - freshwater
  • Supported Measurements:
    Temperature, Barometric Pressure, Water Level
  • Range: 0 to 9 m (0 to 30 ft)
  • Accuracy: ±0.05% FS, 0.5 cm (0.015 ft)

$495
HOBO U20 Water Level Data Logger  - U20-001-01



HOBO U20 Titanium Water Level Data Logger - U20-001-01-Ti
30-Foot Depth - saltwater
  • Supported Measurements:
    Temperature, Barometric Pressure, Water Level
  • Range: 0 to 9 m (0 to 30 ft)
  • Accuracy: ±0.05% FS, 0.5 cm (0.015 ft)

$595
HOBO U20 Titanium Water Level Data Logger  - U20-001-01-Ti



HOBO U20 Water Level Data Logger - U20-001-02
100-Foot Depth - freshwater
  • Supported Measurements:
    Temperature, Barometric Pressure, Water Level
  • Range: 0 to 30.6 m (0 to 100 ft)
  • Accuracy: ±0.05% FS, 1.5 cm (0.05 ft)

$495
HOBO U20 Water Level Data Logger - U20-001-02



HOBO U20 Titanium Water Level Data Logger - U20-001-02-Ti
100-Foot Depth - saltwater
  • Supported Measurements:
    Temperature, Barometric Pressure, Water Level
  • Range: 0 to 30.6 m (0 to 100 ft)
  • Accuracy: ±0.05% FS, 1.5 cm (0.05 ft)

$595
HOBO U20 Titanium Water Level Data Logger  - U20-001-02-Ti



HOBO U20 Water Level Data Logger - U20-001-03
250-Foot Depth - freshwater
  • Supported Measurements:
    Temperature, Barometric Pressure, Water Level
  • Range: 0 to 76.5 m (0 to 251 ft)
  • Accuracy: ±0.05% FS, 3.8 cm (0.125 ft)

$495
HOBO U20 Water Level Data Logger - U20-001-03



HOBO U20 Titanium Water Level Data Logger - U20-001-03-Ti
250-Foot Depth - saltwater
  • Supported Measurements:
    Temperature, Barometric Pressure, Water Level
  • Range: 0 to 76.5 m (0 to 251 ft)
  • Accuracy: ±0.05% FS, 3.8 cm (0.125 ft)

$595
HOBO U20 Titanium Water Level Data Logger  - U20-001-03-Ti



HOBO U20 Water Level Data Logger - U20-001-04
13 Foot Depth - freshwater
  • Supported Measurements:
    Temperature, Barometric Pressure, Water Level
  • Range: 0 to 4 m (0 to 13 ft)
  • Accuracy: ±0.075% FS, 0.3 cm (0.01 ft)

$495
HOBO U20 Water Level Data Logger - U20-001-04



HOBO U20 Titanium Water Level Data Logger - U20-001-04-Ti
13 Foot Depth - saltwater
  • Supported Measurements:
    Temperature, Barometric Pressure, Water Level
  • Range: 0 to 4 m (0 to 13 ft)
  • Accuracy: ±0.075% FS, 0.3 cm (0.01 ft)

$595
HOBO U20 Titanium Water Level Data Logger  - U20-001-04-Ti



HOBO Pendant® Temperature/Alarm Data Logger 8K - UA-001-08
  • Supported Measurements:
    Temperature, Water Temp
  • Range: In water/ice: -20° to 50°C (-4° to 122°F) In air: -20° to 70°C (-4° to 158°F)
  • Accuracy: ± 0.53°C from 0° to 50°C (± 0.95°F from 32° to 122°F)

$42
HOBO Pendant<sup>®</sup>  Temperature/Alarm Data Logger 8K  - UA-001-08



HOBO Pendant® Temperature/Alarm Data Logger 64K - UA-001-64
  • Supported Measurements:
    Temperature, Water Temp
  • Range: In water/ice: -20° to 50°C (-4° to 122°F) In air: -20° to 70°C (-4° to 158°F)
  • Accuracy: ± 0.53°C from 0° to 50°C (± 0.95°F from 32° to 122°F)

$59
HOBO Pendant<sup>®</sup> Temperature/Alarm Data Logger 64K - UA-001-64



HOBO Pendant® Temperature/Light Data Logger 8K - UA-002-08
  • Supported Measurements:
    Temperature, Light Intensity, Water Temp
  • Range: Temperature: -20° to 70°C (-4° to 158°F) Light: 0 to 320,000 lux (0 to 30,000 lumens/ft2 )
  • Accuracy: Temperature: ± 0.53°C from 0° to 50°C (± 0.95°F from 32° to 122°F), Light intensity: Designed for measurement of relative light levels

$47
HOBO Pendant<sup>®</sup> Temperature/Light Data Logger 8K - UA-002-08



HOBO Pendant Temperature/Light Data Logger 64K - UA-002-64
  • Supported Measurements:
    Temperature, Light Intensity, Water Temp
  • Range: Temperature: -20° to 70°C (-4° to 158°F) Light: 0 to 320,000 lux (0 to 30,000 lumens/ft2 )
  • Accuracy: Temperature: ± 0.53°C from 0° to 50°C (± 0.95°F from 32° to 122°F), Light intensity: Designed for measurement of relative light levels

$64
HOBO Pendant Temperature/Light Data Logger 64K - UA-002-64



HOBO Water Level Logger (30 ft) - U20L-01
  • Supported Measurements:
    Temperature, Barometric Pressure, Water Level
  • Range: 0 to 207 kPa (0 to 30 psia); approximately 0 to 9 m (0 to 30 ft) of water depth at sea level, or 0 to 12 m (0 to 40 ft) of water at 3,000 m (10,000 ft) of altitude
  • Accuracy: Typical error: ±0.1% FS, 1.0 cm (0.03 ft) water
    Maximum error: ±0.2% FS, 2.0 cm (0.06 ft) water

$299



HOBO Water Level Logger (100 ft) - U20L-02
  • Supported Measurements:
    Temperature, Barometric Pressure, Water Level
  • Range: 0 to 400 kPa (0 to 58 psia); approximately 0 to 30.6 m (0 to 100 ft) of water depth at sea level, or 0 to 33.6 m (0 to 111 ft) of water at 3,000 m (10,000 ft) of altitude
  • Accuracy: Typical error: ±0.1% FS, 3.0 cm (0.1 ft) water
    Maximum error: ±0.2% FS, 6.0 cm (0.2 ft) water

$299



HOBO Water Level Logger (13 ft) - U20L-04
  • Supported Measurements:
    Temperature, Barometric Pressure, Water Level
  • Range: 0 to 145 kPa (0 to 21 psia); approximately 0 to 4 m (0 to 13 ft) of water depth at sea level, or 0 to 7 m (0 to 23 ft) of water at 3,000 m (10,000 ft) of altitude
  • Accuracy: Typical error: ±0.1% FS, 0.4 cm (0.013 ft) water
    Maximum error: ±0.2% FS, 0.8 cm (0.026 ft) water

$299