Image
83 results found.
Solar Photovoltaic Array Monitoring at Allegheny College
Onset has teamed up with students at Allegheny College to monitor a 400-500 Watt solar photovoltaic array on the roof of a campus building.
Listen podcast
Katrina-inspired Tidal Studies Utilize HOBO Water Level Data Loggers
Water level loggers were used to conduct investigative vertical datum studies for the Army Corps of Engineers following Hurricane Katrina in August 2005.
Read more
Water Level Monitoring for Tidal Analysis
This webinar will provide you with an understanding of the process of referencing water datums to land-based vertical datums, and how to monitor water body surface levels using pressure sensors.
Watch Webinar
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.
Read tech note
Deploying a HOBO water level data logger in salt water
316 Stainless Steel has good corrosion resistance but it can be damaged by crevice corrosion in saltwater. The stainless steel versions of HOBO data loggers should not be deployed for more than 6 months (lifetime cumulative) in salt or brackish water, or the housing will eventually fail and water will damage the electronics. How long the data logger will last depends on many factors such as salinity, level of dissolved oxygen, and temperature. Biofouling can also limit deployments in saltwater, because growths on the pressure sensor will change its calibration.
Read tech note
Using 3rd-party barometric pressure data for compensation
HOBOware Pro's Barometric Compensation Assistant now includes the ability to import barometric pressure data from 3rd-party sources such as nearby weather stations. The data needs to be provided in a text data file, and can be in kPa, Pa, mbar, mm HG, psi, or inches Hg. For more information, see the User's Guides for the Barometric Compensation Assistant and the HOBOware Pro software (Importing Data section) or in HOBOware under Help, HOBOware Help.
Read tech note
Using a Water Level Data Logger to Determine Stream Flow
Water level data loggers are commonly used to determine stream flow over time and "peak discharge"
Read tech note
Altitude effects on water level data logger range
Onset's HOBO® U20-001-01 Water Level Data Logger is calibrated from 10 to 30 psia. The 10 psia lower limit creates an effective altitude restriction of about 10,000 feet when the data logger is used. The unit can be used above 10,000 feet, but it is outside of the calibrated range, and the accuracy specification does not apply. The data logger will function, but the accuracy will get worse the further below 10 psia the pressure drops.
Read tech note
Wireline mounting a U20 water level data logger in a well
HOBO Water Level data loggers can be hung in wells using Onset's special low-stretch cable with Teflon coating, to avoid snagging and to make them easy to clean.
Read tech note
Protecting data loggers from electrical discharge (ESD)
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.
Read tech note