Water Quality Data Loggers

Water Quality Management

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

Results: 1 to 16 of 21
  • UTBI-001

    Optical Interface for data transferOnly 3x4 cm, this tiny data logger measures temperatures over a wide temperature range. The TidbiT v2 provides 12-bit resolution and has ±0.2 °C accuracy. It is designed for outdoor and underwater environments and is waterproof to 300 m (1000 ft). An optical USB interface allows users to offload data in seconds. Please note, a solar radiation shield is required to obtain accurate air temperature measurements in sunlight (RS1 Solar Radiation Shield, assembly required; or M-RSA pre-assembled Solar Radiation Shield).

    Features:

    • Onset's smallest temperature data logger
    • Waterproof to 300 meters (1,000 feet)
    • Data readout in less than 30 seconds via fast Optic USB interface
    Add Extended warranty for $13.30/unit?

    Yes No thanks

    (this choice will apply to all existing UTBI-001 in your cartquote request)
    $133

    x
    Full Product Details
    UTBI-001 Data Logger

    Optical Interface for data transferOnly 3x4 cm, this tiny data logger measures temperatures over a wide temperature range. The TidbiT v2 provides 12-bit resolution and has ±0.2 °C accuracy. It is designed for outdoor and underwater environments and is waterproof to 300 m (1000 ft). An optical USB interface allows users to offload data in seconds. Please note, a solar radiation shield is required to obtain accurate air temperature measurements in sunlight (RS1 Solar Radiation Shield, assembly required; or M-RSA pre-assembled Solar Radiation Shield).

    Features:

    • Onset's smallest temperature data logger
    • Waterproof to 300 meters (1,000 feet)
    • Data readout in less than 30 seconds via fast Optic USB interface


    $133
    Add Extended warranty for $13.30/unit?

    Yes No thanks

    (this choice will apply to all existing UTBI-001 in your cartquote request)
  • U22-001

    Optical Interface for data transferThe HOBO Water Temp Pro v2 is durable with 12-bit resolution. Complete with a precision sensor for ±0.2°C accuracy, this logger measures temperatures between -40°C and 70°C (-40°F to 158°F) in air and up to 50°C (122°F) in water. Its waterproof, streamlined case allows for extended deployment in fresh or salt water. Moreover, the Water Temp Pro v2’s optical USB interface makes it possible  to offload data even while the logger is wet or underwater. A solar radiation shield is required to obtain accurate air temperature measurements in sunlight (RS1 Solar Radiation Shield, assembly required; or M-RSA pre-assembled Solar Radiation Shield).

    Add Extended warranty for $12.90/unit?

    Yes No thanks

    (this choice will apply to all existing U22-001 in your cartquote request)
    $129

    x
    Full Product Details
    U22-001 Data Logger

    Optical Interface for data transferThe HOBO Water Temp Pro v2 is durable with 12-bit resolution. Complete with a precision sensor for ±0.2°C accuracy, this logger measures temperatures between -40°C and 70°C (-40°F to 158°F) in air and up to 50°C (122°F) in water. Its waterproof, streamlined case allows for extended deployment in fresh or salt water. Moreover, the Water Temp Pro v2’s optical USB interface makes it possible  to offload data even while the logger is wet or underwater. A solar radiation shield is required to obtain accurate air temperature measurements in sunlight (RS1 Solar Radiation Shield, assembly required; or M-RSA pre-assembled Solar Radiation Shield).


    $129
    Add Extended warranty for $12.90/unit?

    Yes No thanks

    (this choice will apply to all existing U22-001 in your cartquote request)
  • U20L-04

    The HOBO U20L-004 is a low-cost, research-grade water level data logger for continuously measuring water level and temperature in a wide range of underwater environments. It features 0.1% measurement accuracy, a polypropylene housing for use in both fresh and salt water, and a non-vented design for convenient and hassle-free deployment.

    Add Extended warranty for $29.90/unit?

    Yes No thanks

    (this choice will apply to all existing U20L-04 in your cartquote request)
    $299

    x
    Full Product Details
    U20L-04 Data Logger

    The HOBO U20L-004 is a low-cost, research-grade water level data logger for continuously measuring water level and temperature in a wide range of underwater environments. It features 0.1% measurement accuracy, a polypropylene housing for use in both fresh and salt water, and a non-vented design for convenient and hassle-free deployment.


    $299
    Add Extended warranty for $29.90/unit?

    Yes No thanks

    (this choice will apply to all existing U20L-04 in your cartquote request)
  • U20L-01

    The HOBO U20L-001 is a low-cost, research-grade water level data logger for continuously measuring water level and temperature in a wide range of underwater environments. It features 0.1% measurement accuracy, a polypropylene housing for use in both fresh and salt water, and a non-vented design for convenient and hassle-free deployment.

    Add Extended warranty for $29.90/unit?

    Yes No thanks

    (this choice will apply to all existing U20L-01 in your cartquote request)
    $299

    x
    Full Product Details
    U20L-01 Data Logger

    The HOBO U20L-001 is a low-cost, research-grade water level data logger for continuously measuring water level and temperature in a wide range of underwater environments. It features 0.1% measurement accuracy, a polypropylene housing for use in both fresh and salt water, and a non-vented design for convenient and hassle-free deployment.


    $299
    Add Extended warranty for $29.90/unit?

    Yes No thanks

    (this choice will apply to all existing U20L-01 in your cartquote request)
  • U20L-02

    The HOBO U20L-002 is a low-cost, research-grade water level data logger for continuously measuring water level and temperature in a wide range of underwater environments. It features 0.1% accuracy, a polypropylene housing for use in both fresh and salt water, and a non-vented design for convenient and hassle-free deployment.

    Add Extended warranty for $29.90/unit?

    Yes No thanks

    (this choice will apply to all existing U20L-02 in your cartquote request)
    $299

    x
    Full Product Details
    U20L-02 Data Logger

    The HOBO U20L-002 is a low-cost, research-grade water level data logger for continuously measuring water level and temperature in a wide range of underwater environments. It features 0.1% accuracy, a polypropylene housing for use in both fresh and salt water, and a non-vented design for convenient and hassle-free deployment.


    $299
    Add Extended warranty for $29.90/unit?

    Yes No thanks

    (this choice will apply to all existing U20L-02 in your cartquote request)
  • U20-001-02-Ti

    The HOBO Water Level Titanium is recommended for saltwater deployment for recording water levels and temperatures in wetlands and tidal areas. This data logger features high accuracy at a great price and HOBO ease-of-use, with no cumbersome vent tubes or desiccants to maintain.

    View how the HOBO Water Level Data Logger compares to the Competition.

    Add Extended warranty for $59.50/unit?

    Yes No thanks

    (this choice will apply to all existing U20-001-02-Ti in your cartquote request)
    $595

    x
    Full Product Details
    U20-001-02-Ti Data Logger

    The HOBO Water Level Titanium is recommended for saltwater deployment for recording water levels and temperatures in wetlands and tidal areas. This data logger features high accuracy at a great price and HOBO ease-of-use, with no cumbersome vent tubes or desiccants to maintain.

    View how the HOBO Water Level Data Logger compares to the Competition.


    $595
    Add Extended warranty for $59.50/unit?

    Yes No thanks

    (this choice will apply to all existing U20-001-02-Ti in your cartquote request)
  • U26-001

    Measure oxygen concentrations in lakes, streams, rivers, estuaries, and coastal waters with the HOBO U26 Dissolved Oxygen Data Logger. This affordable and precise data logger is recommended for aquatic biology and hydrology research projects. The HOBO U26 uses RDO® Basic (Rugged Dissolved Oxygen) optical DO sensor technology and is easy to maintain.

    Add Extended warranty for $125.00/unit?

    Yes No thanks

    (this choice will apply to all existing U26-001 in your cartquote request)
    $1250

    x
    Full Product Details
    U26-001 Data Logger

    Measure oxygen concentrations in lakes, streams, rivers, estuaries, and coastal waters with the HOBO U26 Dissolved Oxygen Data Logger. This affordable and precise data logger is recommended for aquatic biology and hydrology research projects. The HOBO U26 uses RDO® Basic (Rugged Dissolved Oxygen) optical DO sensor technology and is easy to maintain.


    $1250
    Add Extended warranty for $125.00/unit?

    Yes No thanks

    (this choice will apply to all existing U26-001 in your cartquote request)

  • The HOBO U12 Deep Ocean Water Temperature Data Logger is a single-channel water temperature logger with 12-bit resolution that can record up to 43,000 measurements. With its robust titanium housing, this logger is designed to withstand ocean extremes of depth and temperature.

    Add Extended warranty for $79.90/unit?

    Yes No thanks

    (this choice will apply to all existing U12-015-03 in your cartquote request)
    $799

    x
    Full Product Details
    U12-015-03 Data Logger

    The HOBO U12 Deep Ocean Water Temperature Data Logger is a single-channel water temperature logger with 12-bit resolution that can record up to 43,000 measurements. With its robust titanium housing, this logger is designed to withstand ocean extremes of depth and temperature.


    3 week lead time


    $799
    Add Extended warranty for $79.90/unit?

    Yes No thanks

    (this choice will apply to all existing U12-015-03 in your cartquote request)
  • U24-002-C

    The HOBO U24-002-C is a cost-effective data logger for measuring salinity, conductivity and temperature in saltwater environments with relatively small changes in salinity (±5,000 μS/cm) such as saltwater bays, or to detect salinity events such as upwelling, rainstorm, and discharge events. It can also be used to gather salinity data for salinity compensation of HOBO U26 Dissolved Oxygen logger data.

    Note: When monitoring salinity in waters with more than +/-5,000 uS/cm variation, refer to the accuracy shown in Plot C in the product specifications to determine if the accuracy is acceptable for your needs. Monthly field calibration readings are typically required to achieve the best accuracy.

    Add Extended warranty for $75.00/unit?

    Yes No thanks

    (this choice will apply to all existing U24-002-C in your cartquote request)
    $750

    x
    Full Product Details
    U24-002-C Data Logger

    The HOBO U24-002-C is a cost-effective data logger for measuring salinity, conductivity and temperature in saltwater environments with relatively small changes in salinity (±5,000 μS/cm) such as saltwater bays, or to detect salinity events such as upwelling, rainstorm, and discharge events. It can also be used to gather salinity data for salinity compensation of HOBO U26 Dissolved Oxygen logger data.

    Note: When monitoring salinity in waters with more than +/-5,000 uS/cm variation, refer to the accuracy shown in Plot C in the product specifications to determine if the accuracy is acceptable for your needs. Monthly field calibration readings are typically required to achieve the best accuracy.


    $750
    Add Extended warranty for $75.00/unit?

    Yes No thanks

    (this choice will apply to all existing U24-002-C in your cartquote request)
  • U20-001-03-Ti

    The HOBO Water Level Titanium is recommended for saltwater deployment for recording water levels and temperatures in wetlands and tidal areas. This data logger features high accuracy at a great price and HOBO ease-of-use, with no cumbersome vent tubes or desiccants to maintain.

    View how the HOBO Water Level Data Logger compares to the Competition.

    Add Extended warranty for $59.50/unit?

    Yes No thanks

    (this choice will apply to all existing U20-001-03-Ti in your cartquote request)
    $595

    x
    Full Product Details
    U20-001-03-Ti Data Logger

    The HOBO Water Level Titanium is recommended for saltwater deployment for recording water levels and temperatures in wetlands and tidal areas. This data logger features high accuracy at a great price and HOBO ease-of-use, with no cumbersome vent tubes or desiccants to maintain.

    View how the HOBO Water Level Data Logger compares to the Competition.


    $595
    Add Extended warranty for $59.50/unit?

    Yes No thanks

    (this choice will apply to all existing U20-001-03-Ti in your cartquote request)
  • U24-001

    This high-accuracy conductivity data logger is a cost-effective way to collect water quality data. The HOBO U24 measures and records both conductivity and temperatures in streams, lakes, and other freshwater sources. This logger is recommended for monitoring aquifers for saltwater intrusion and road and agricultural runoff. This product’s open access to its sensor simplifies cleaning and maintenance. The HOBO U24’s non-contact sensor minimizes measurement errors related to drift. In addition, the logger features software-based drift compensation. 

    The HOBO U24 Conductivity data logger features a non-contact sensor with a Titanium Pentoxide coating. This coating prevents the sensor from coming in contact with the water, which in turn prevents tarnishing or corrosion associated with traditional electrode sensors. This sensor coating is also inert, enabling fouling to be easily wiped off the sensor.
    Add Extended warranty for $75.00/unit?

    Yes No thanks

    (this choice will apply to all existing U24-001 in your cartquote request)
    $750

    x
    Full Product Details
    U24-001 Data Logger

    This high-accuracy conductivity data logger is a cost-effective way to collect water quality data. The HOBO U24 measures and records both conductivity and temperatures in streams, lakes, and other freshwater sources. This logger is recommended for monitoring aquifers for saltwater intrusion and road and agricultural runoff. This product’s open access to its sensor simplifies cleaning and maintenance. The HOBO U24’s non-contact sensor minimizes measurement errors related to drift. In addition, the logger features software-based drift compensation. 

    The HOBO U24 Conductivity data logger features a non-contact sensor with a Titanium Pentoxide coating. This coating prevents the sensor from coming in contact with the water, which in turn prevents tarnishing or corrosion associated with traditional electrode sensors. This sensor coating is also inert, enabling fouling to be easily wiped off the sensor.


    $750
    Add Extended warranty for $75.00/unit?

    Yes No thanks

    (this choice will apply to all existing U24-001 in your cartquote request)
  • U20-001-01-Ti

    The HOBO Water Level Titanium is recommended for saltwater deployment for recording water levels and temperatures in wetlands and tidal areas. This data logger features high accuracy at a great price and HOBO ease-of-use, with no cumbersome vent tubes or desiccants to maintain.

    View how the HOBO Water Level Data Logger compares to the Competition.

    Add Extended warranty for $59.50/unit?

    Yes No thanks

    (this choice will apply to all existing U20-001-01-Ti in your cartquote request)
    $595

    x
    Full Product Details
    U20-001-01-Ti Data Logger

    The HOBO Water Level Titanium is recommended for saltwater deployment for recording water levels and temperatures in wetlands and tidal areas. This data logger features high accuracy at a great price and HOBO ease-of-use, with no cumbersome vent tubes or desiccants to maintain.

    View how the HOBO Water Level Data Logger compares to the Competition.


    $595
    Add Extended warranty for $59.50/unit?

    Yes No thanks

    (this choice will apply to all existing U20-001-01-Ti in your cartquote request)
  • U20-001-01

    The HOBO Water Level data logger features high accuracy at a great price and ease-of-use, with no cumbersome vent tubes or desiccants to maintain. This data logger is ideal for recording water levels and temperatures in shallow wells, streams, lakes and freshwater wetlands.  For saltwater deployments, such as brackish wetlands and tidal areas, see HOBO U20 Water Level Titanium.

    View how the HOBO Water Level Data Logger compares to the Competition.

     

    Add Extended warranty for $49.50/unit?

    Yes No thanks

    (this choice will apply to all existing U20-001-01 in your cartquote request)
    $495

    x
    Full Product Details
    U20-001-01 Data Logger

    The HOBO Water Level data logger features high accuracy at a great price and ease-of-use, with no cumbersome vent tubes or desiccants to maintain. This data logger is ideal for recording water levels and temperatures in shallow wells, streams, lakes and freshwater wetlands.  For saltwater deployments, such as brackish wetlands and tidal areas, see HOBO U20 Water Level Titanium.

    View how the HOBO Water Level Data Logger compares to the Competition.

     


    $495
    Add Extended warranty for $49.50/unit?

    Yes No thanks

    (this choice will apply to all existing U20-001-01 in your cartquote request)
  • UA-002-08

    Optical Interface for data transfer

    This HOBO Pendant® data logger is a miniature, waterproof two-channel temperature and relative light level data logger. The 8K model comes at a great value and is suitable for indoor, outdoor, and underwater applications. This logger holds approximately 6.5K of 10-bit readings. Use a solar radiation shield for accurate temperature measurement in sunlight.See RS1 Solar Radiation Shield (assembly required) and M-RSA (pre-assembled) Solar Radiation Shield. Note that using a solar radition shield prevents the use of the light sensor. 

    • Low-cost temperature with alarm indication or light intensity
    • Waterproof housing for wet or underwater use
    • Data readout in less than 30 seconds via fast Optic USB interface
    Add Extended warranty for $4.70/unit?

    Yes No thanks

    (this choice will apply to all existing UA-002-08 in your cartquote request)
    $47

    x
    Full Product Details
    UA-002-08 Data Logger

    Optical Interface for data transfer

    This HOBO Pendant® data logger is a miniature, waterproof two-channel temperature and relative light level data logger. The 8K model comes at a great value and is suitable for indoor, outdoor, and underwater applications. This logger holds approximately 6.5K of 10-bit readings. Use a solar radiation shield for accurate temperature measurement in sunlight.See RS1 Solar Radiation Shield (assembly required) and M-RSA (pre-assembled) Solar Radiation Shield. Note that using a solar radition shield prevents the use of the light sensor. 

    • Low-cost temperature with alarm indication or light intensity
    • Waterproof housing for wet or underwater use
    • Data readout in less than 30 seconds via fast Optic USB interface


    $47
    Add Extended warranty for $4.70/unit?

    Yes No thanks

    (this choice will apply to all existing UA-002-08 in your cartquote request)
  • U20-001-04-Ti

    Providing a narrow range of measurement for the best possible accuracy, this version is ideal for monitoring water levels and temperatures in wells, streams, lakes and wetlands.

     

    Like other HOBO Water Level Data Loggers, the 13-foot version offers exceptional value and ease-of-use, with no cumbersome vent tubes or desiccants to maintain. This data logger is ideal for recording water levels and temperatures in salt water environments.

    View how the HOBO Water Level Data Logger compares to the Competition.

    Add Extended warranty for $59.50/unit?

    Yes No thanks

    (this choice will apply to all existing U20-001-04-Ti in your cartquote request)
    $595

    x
    Full Product Details
    U20-001-04-Ti Data Logger

    Providing a narrow range of measurement for the best possible accuracy, this version is ideal for monitoring water levels and temperatures in wells, streams, lakes and wetlands.

     

    Like other HOBO Water Level Data Loggers, the 13-foot version offers exceptional value and ease-of-use, with no cumbersome vent tubes or desiccants to maintain. This data logger is ideal for recording water levels and temperatures in salt water environments.

    View how the HOBO Water Level Data Logger compares to the Competition.


    $595
    Add Extended warranty for $59.50/unit?

    Yes No thanks

    (this choice will apply to all existing U20-001-04-Ti in your cartquote request)
  • UA-002-64

    Optical Interface for data transferThis miniature data logger can record temperature and relative light levels. Complete with waterproof casing, this product is designed for indoor, outdoor, and underwater deployment. This model can store approximately 52,000 measurments of 10-bit readings.

    • Low-cost temperature with alarm indication or light intensity
    • Waterproof housing for wet or underwater use
    • Data readout in less than 30 seconds via fast Optic USB interface
    Add Extended warranty for $6.40/unit?

    Yes No thanks

    (this choice will apply to all existing UA-002-64 in your cartquote request)
    $64

    x
    Full Product Details
    UA-002-64 Data Logger

    Optical Interface for data transferThis miniature data logger can record temperature and relative light levels. Complete with waterproof casing, this product is designed for indoor, outdoor, and underwater deployment. This model can store approximately 52,000 measurments of 10-bit readings.

    • Low-cost temperature with alarm indication or light intensity
    • Waterproof housing for wet or underwater use
    • Data readout in less than 30 seconds via fast Optic USB interface


    $64
    Add Extended warranty for $6.40/unit?

    Yes No thanks

    (this choice will apply to all existing UA-002-64 in your cartquote request)

Pages