Dissolved Oxygen Data Logger
Part # U26-001
 
 
$1250
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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. See compatible items below.


Overview

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.

Includes:

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

Highlighted 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
  • 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 (<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 Water Level Data Logger (U20-001-04).

In what environment does this data logger operate?

This data logger operates in an underwater environment.

What measurements does this data logger support?

The U26-001 data logger supports the following measurements: Dissolved Oxygen and Temperature

To see the full specifications for this product, please see our product manual found under the documentation tab if available.

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).

 

Software
Graphing and Analysis
HOBOware Pro Mac/Win (USB cable included)
$99
HOBOware Pro - Mac/Win (Download Only) Data Logger
$75
Communications
Data Offload - Base Stations - Shuttles
Optic USB Base Station
$124
HOBO® Waterproof Shuttle
$249
Maintenance
Calibration Solution
Sodium Sulfite Solution - U26-CAL-SOL
$25
Coupler Replacement
Replacement Coupler for U20L, U22, U24, and U26 Data Loggers
$11
Replacement Sensor Cap
Replacement DO Sensor Cap - U26-RDOB-1
$85
Accessories
Antifouling Protective Guard
Antifouling Protective Guard - U26-GUARD-2
$95
Carrying Case
Pelican Case
$245
Data Offload - Base Stations - Shuttles
HOBO U-Shuttle
$281
HOBO® Waterproof Shuttle
$249
Stainless Steel Cable/Crimps
1/16" Stainless Steel Cable 300ft
$360
1/16" Stainless Steel Cable 50ft
$69
Crimp Sleeve 12 Pack
$32
Documentation for the U26-001

 
U26-Data-Sheet logo
U26 Dissolved Oxygen Logger Data Sheet


 
DO-technology-backgrounder logo
Onset’s HOBO Dissolved Oxygen Logger (U26-001)Uses the Latest Advancements in Optical Measurement Technology - Technology Backgrounder


 
Dissolved-Oxygen-Assistant-Users-Guide-15604 logo
HOBOware Pro Dissolved Oxygen Assistant - User’s Guide


 
RDO Basic Sensor Replacement Kit (U26-RDOB-1) for HOBO Dissolved Oxygen Data Loggers (U26-001) Installation Instructions


 
HOBO Dissolved Oxygen Logger (U26-001) User's Manual