Resources for U24-002-C

HOBO Saltwater Conductivity/Salinity Data Logger

U24-002-C Data Sheet
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Commission Uses Data Loggers to Gather Data Prior to Gas Development

The Delaware River Basin Commission is using robust, easily-deployed conductivity and temperature data loggers to study the safety of the extraction of natural gas from source rock in the Delaware River Basin.

Stopping your data logger

All HOBO and StowAway data loggers shut off when the memory is full (unless wrap-around is selected) or the data is downloaded to a computer. Once the data is downloaded to the computer, the data logger is in off mode and will need to be relaunched to continue data collection. If the data logger you are using is shuttle-compatible and you are downloading to a shuttle, the shuttle will automatically relaunch the data logger using the previous settings.

Possibility of exposure to chemicals or chemical vapors

This is dependent on the data logger you are using and the chemical and/or concentration of the chemical to which the data logger is exposed. Many chemicals will have an adverse effect on the data loggers and/or the sensors that the loggers utilize. Contact your authorized sales representative with questions regarding specific chemical contact with the data logger that you are using.

Optic logger communication problems

All Users: HOBO Optic data loggers must be inserted into the Base Station (or Shuttle) using the appropriate coupler for that logger in order for the computer to detect them. Note: HOBOware will not detect the Base Station alone as an attached USB device. Check to make sure that the coupler is positioned properly and the magnet end is closest to the data logger, not the Base Station or the Optic Shuttle.

Cleaning Optic StowAway/StowAway TidbiT data loggers

Do not use any type of chemical on an Optic or TidbiT data logger! You can wash the data logger with a mild soap and warm water solution. If the data logger has a mineral or algae build-up that will not come clean, do not scrape it off. Instead, use a plastic polish, such as Novice.

Data logger is shutting off prematurely

A discharge of static electricity may cause a running data logger to stop recording. Precautions should be taken to prevent this while handling the data logger. Discharges may occur when there is a charge difference between the data logger and a cable being connected to it or when a person touches an exposed jack.

Deploying a logger in a culvert pipe

Here’s a link to a YouTube video showing the installation of our conductivity loggers in a culvert pipe: http://www.youtube.com/watch?v=bpNwM6jQQWo&feature=plcp

U24 Conductivity Loggers Used in Urban Stream Study

A researcher at Duke University’s River Center is studying how urban development in the Piedmont Triangle area of North Carolina is affecting stream flow and stream water quality.

Cell constant note

Because the U24 data logger uses a noncontact AC conductivity measurement system, the cell constant varies over the measurement range.