Water Quality Data Loggers

 

Track pH, conductivity, dissolved oxygen, and more!

For more than 25 years, Onset’s HOBO data loggers have set the standard for reliable, and accurate water quality monitoring.

  • Quick and simple deployment
  • Rugged design for harsh environments
  • Easy setup and analysis with HOBO software
  • Models available for easy, wireless data offload with mobile device

 

Results: 1 to 6 of 6
  • MX2501

    The HOBO MX2501 pH and Temperature Data Logger is designed for long-term monitoring of pH in estuaries, lakes, streams, rivers, and oceans. Leveraging Bluetooth Low Energy® (BLE) technology, the MX2501 pH Logger communicates wirelessly with the free HOBOmobile® app on iOS and Android devices making logger setup, calibration, and data offload quick and easy. A guided pH calibration process on the HOBOmobile app makes an otherwise complicated process easier to follow. This affordable and compact logger dramatically cuts the time and effort needed to collect field data, while also offering higher resolution data.

    NOTE: pH electrodes should always be stored in storage solution when not deployed.

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  • BOOT-MX2203-xx

    The optional MX2203 thermoplastic elastomer (Santoprene) boot provides cushioning for use in harsh conditions — offered in black to minimize underwater visibility, in white to minimize solar radiation absorption or grey. Five boots included.

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  • MX2203-ORING

    This is a replacement O-ring for the MX2203.

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  • MX2203

    The HOBO MX2203 TidbiT waterproof temperature logger leverages the power of Bluetooth Low Energy (BLE) to deliver high-accuracy temperature measurements straight to your iOS or Android mobile device. Designed for durability, this rugged waterproof logger is ideal for long-term deployments in streams, lakes, and oceans (up to 400 foot depths). Data collection in the field has never been easier!

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  • 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.

    Includes:

    • U26-001 data logger
    • DO sensor cap
    • Protective Guard
    • Calibration Boot with sponge

    Our HOBO U26 Dissolved Oxygen logger has been part of a multi-year evaluation of DO loggers and sensors by the Alliance for Coastal Technologies (ACT), and the results have been published online. This provides an un-biased report of how our U26 performs in lab and field conditions. Note that our response letter with our added recommendations is attached at the end of this report on pages 58 and 59.

    Click here to read.

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  • 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.
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