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Monitoring Solutions for Water, Indoor, Outdoor, & Agriculture
Easy to maintain and measures oxygen concentrations in lakes, streams, rivers, estuaries, and coastal waters.
Easy to maintain and measures oxygen concentrations in lakes, streams, rivers, estuaries, and coastal waters.
HOBO data loggers requires HOBOware software (USB interface cable included w/CD purchase) and a communications device. HOBOware Pro is required when using the U-DTW-1 Waterproof shuttle. For DO measurements in saltwater, an adjustment for salinity is required. For waters with small changes in salinity (<2 ppt), a salinity meter reading typically provides enough accuracy.
Features
Applications
Supported Measurements
HOBOware
With the latest version of software (HOBOware 3.7.8), Optic Base Station and Waterproof Shuttle users will find much-improved communications methods.
For Mac users - Updating to apple's latest operating system (OS X 10.11.5) will remedy any communications issues you might have encountered with the HOBO U30 Weather Station and the Waterproof Shuttle.
HOBOmobile
HOBOmobile 1.5 for iOS can now push data to HOBOlink.com for free online data storage.
Download the Mobile App
| Dissolved Oxygen | |
| Sensor Type | Optical |
| Measurement Range | 0 to 30 mg/L |
| Calibrated Range | 0 to 20 mg/L; 32 to 95°F (0 to 35°C) |
| Accuracy | 0.2 mg/L up to 8 mg/L; 0.5 mg/L from 8 to 20 mg/L |
| Resolution | 0.02 mg/L |
| Temperature | |
| Operation rang | 23 to 104°F (-5 to 40°C); non-Freezing |
| Accuracy | 0.36°F (0.2°C) |
| Resolution | 0.04°F (0.02°C) |
| Response Time | To 90% in less than 30 minutes |
| Logger | |
| Memory | 21,700 sets of DO and temperature measurements (64 KB total memory) |
| Logging Rate | 1 minute to 18 hours |
The Alliance for Coastal Technologies (ACT) has released an independent verification study of Onset’s HOBO® U26 Dissolved Oxygen Logger as part of a multi-year evaluation of in situ dissolved oxygen (DO) sensors. Conducted during 2015-2016, the unbiased verification characterized performance measures of accuracy and reliability in a series of controlled laboratory studies and field mooring tests in diverse coastal environments.
The HOBO U26—one of two stand-alone DO loggers in the study —performed well in these tests, demonstrating high accuracy over a wide range of DO, temperature, and salinity conditions. The HOBO U26 also successfully maintained its accuracy over a long-term (56 days) lab testing period.
The verification included several months of laboratory testing and three field deployments in freshwater, estuarine, and oceanic environments. Instrument accuracy and precision for the HOBO U26 was tested under nine combinations of temperature and salinity over a range of DO concentrations from 10% to 120% of saturation.
Results indicated that the HOBO U26 operated reliably throughout these challenging tests. The ACT study also found that the response of the HOBO U26 RDO sensor showed good linearity during field testing across freshwater, brackish water, and oceanic water salinity ranges.
“We are very pleased to see the HOBO Dissolved Oxygen Logger perform so well in this independent study, especially considering the HOBO is a fraction of the cost of most of the other DO logging systems,” said Paul Gannett, Onset product marketing manager.
The field tests confirmed the importance of keeping the sensor clean in high-fouling environments. Onset recommends regular cleaning to remove fouling to maintain the performance of the HOBO U26, as well as using field calibration to achieve the best accuracy and compensate for measurement drift from fouling.
Overall, the ACT results confirm the high performance and reliability of the HOBO U26, available at a lower cost than other high-end oceanographic systems.
Click on a category to view a selection of compatible accessories with the Onset HOBO U26-001 Dissolved Oxygen Data Logger.
| Dissolved Oxygen | |
| Sensor Type | Optical |
| Measurement Range | 0 to 30 mg/L |
| Calibrated Range | 0 to 20 mg/L; 32 to 95°F (0 to 35°C) |
| Accuracy | 0.2 mg/L up to 8 mg/L; 0.5 mg/L from 8 to 20 mg/L |
| Resolution | 0.02 mg/L |
| Temperature | |
| Operation rang | 23 to 104°F (-5 to 40°C); non-Freezing |
| Accuracy | 0.36°F (0.2°C) |
| Resolution | 0.04°F (0.02°C) |
| Response Time | To 90% in less than 30 minutes |
| Logger | |
| Memory | 21,700 sets of DO and temperature measurements (64 KB total memory) |
| Logging Rate | 1 minute to 18 hours |
The Alliance for Coastal Technologies (ACT) has released an independent verification study of Onset’s HOBO® U26 Dissolved Oxygen Logger as part of a multi-year evaluation of in situ dissolved oxygen (DO) sensors. Conducted during 2015-2016, the unbiased verification characterized performance measures of accuracy and reliability in a series of controlled laboratory studies and field mooring tests in diverse coastal environments.
The HOBO U26—one of two stand-alone DO loggers in the study —performed well in these tests, demonstrating high accuracy over a wide range of DO, temperature, and salinity conditions. The HOBO U26 also successfully maintained its accuracy over a long-term (56 days) lab testing period.
The verification included several months of laboratory testing and three field deployments in freshwater, estuarine, and oceanic environments. Instrument accuracy and precision for the HOBO U26 was tested under nine combinations of temperature and salinity over a range of DO concentrations from 10% to 120% of saturation.
Results indicated that the HOBO U26 operated reliably throughout these challenging tests. The ACT study also found that the response of the HOBO U26 RDO sensor showed good linearity during field testing across freshwater, brackish water, and oceanic water salinity ranges.
“We are very pleased to see the HOBO Dissolved Oxygen Logger perform so well in this independent study, especially considering the HOBO is a fraction of the cost of most of the other DO logging systems,” said Paul Gannett, Onset product marketing manager.
The field tests confirmed the importance of keeping the sensor clean in high-fouling environments. Onset recommends regular cleaning to remove fouling to maintain the performance of the HOBO U26, as well as using field calibration to achieve the best accuracy and compensate for measurement drift from fouling.
Overall, the ACT results confirm the high performance and reliability of the HOBO U26, available at a lower cost than other high-end oceanographic systems.
Click on a category to view a selection of compatible accessories with the Onset HOBO U26-001 Dissolved Oxygen Data Logger.
