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OVERVIEW
Monitor Dissolved Oxygen Without the Hassle of Constant Calibration
An affordable, precise data logger that measures oxygen concentrations in lakes, streams, rivers, estuaries, and coastal waters. Recommended for aquatic biology and hydrology research projects, this easy-to-maintain logger uses RDO® Basic (Rugged Dissolved Oxygen) optical DO sensor technology.
Features
- Affordable, high performance dissolved oxygen (DO) monitoring with 0.2 mg/L accuracy
- Optical DO sensor technology for long-lasting calibration with less maintenance
- HOBOware Pro’s Dissolved Oxygen Assistant software corrects for measurement drift from fouling; provides salinity-adjusted DO concentrations and percent saturation
- Optical USB interface for high-speed, reliable data offload
- User-replaceable DO sensor cap eliminates need to send logger back to the factory to replace membrane
Note: 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. For environments with greater salinity changes, we generally recommend the HOBO U24-002-C Conductivity logger. If you need DO in Percent Saturation, barometric pressure data is required, which can be logged with a HOBO U20-001-04 Water Level logger.
Important Information
Requires HOBOware Pro software and either a U-DTW-1 Waterproof Shuttle or the Base-U-4 Optic USB Base Station for configuration and data offload.
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SPECIFICATIONS
Dissolved Oxygen
Sensor Type Optical Measurement Range 0 to 30 mg/L Calibrated Range 0 to 20 mg/L; 0 to 35°C (32 to 95°F) 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 Response Time To 90% in less than 2 minutes DO Sensor Cap Life 6 months, cap expires 7 months after initialization Temperature
Temperature Measurement/Operating Range -5 to 40°C (23 to 104°F); non-Freezing Temperature Accuracy 0.2°C (0.36°F) Temperature Resolution 0.02°C (0.04°F) 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 Time Accuracy ±1 minute per month at 0 to 50°C (32 to 122°F) Battery 3.6 V lithium battery; factory replaceable Battery Life 3 years (at 5 minute logging) Download Type Optical Depth Rating 100 m (328 ft) Buoyancy Salt water: 13 g (0.46 oz) negative | Fresh water: 20 g (0.71 oz) negative Wetted Materials Black Delrin®, PVC, EPDM o-rings, silicone bronze screws; rated for saltwater use Size 39.6 mm diameter x 266.7 mm length (1.56 x 10.5 inches) Weight 464 g (16.37 oz) Environmental Rating IP68 CE The CE Marking identifies this product as complying with all relevant directives in the European Union (EU).
HOBO U26 – Dissolved Oxygen Data Logger
$3,561.80 NZD ex GST
The HOBO U26 Dissolved Oxygen Logger is a highly precise, low-cost data logger for measuring concentrations of oxygen in lakes, streams, rivers, estuaries, and coastal waters. Used by aquatic biologists, hydrologists, and other research professionals, the HOBO U26 combines the high accuracy, robust performance of industry-leading RDO® Basic (Rugged Dissolved Oxygen) sensor technology with an easy-to-maintain design.
