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Dissolved Oxygen Data Logger. HOBO - U26-001

 

Dissolved Oxygen

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.

Environment:
The U26-001 Data Logger is for use inUnderwater environments

Measurements:
The U26-001 Data Logger supports the following measurements:
Temperature • Dissolved Oxygen
IMPORTANT:
This HOBO data logger requires HOBOware Pro software and a communications device. See compatible items below.


Feature

  • 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
  • Easy-to-replace DO sensor cap lasts six months

NOTE: For DO measurements in saltwater, an adjustment for salinity is required. For waters with small changes in salinity (HOBO U24-002-C conductivity logger .

NOTE: If you need DO in Percent Saturation, barometric pressure data is required, which can be logged with a HOBO Water Level Data Logger (U20-001-04).

Includes:

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

Spesification

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)
  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)
  Description: ce The CE Marking identifies this product as complying with all relevant directives in the European Union (EU).

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