Onset Computer Corp.

• Non-contact Sensor Minimizes Drift-Related Measurement Errors
• Also Features Open Access to Sensor for Cleaning and Software-Based Drift Compensation
• Software Enables Start/End-Point Calibration to Compensate for Fouling and Easy Conversion to Specific Conductance and Salinity
• 5,000 to 55,000 µS/cm (Conductivity Extended Range) and 5°C to 35°C (Temp) Measurement Ranges
• 3 Year Battery Life with Factory Replaceable Battery
• Stores at Least 14,400 Sets of Measured Readings
• Requires HOBOware Pro Software Download (Version 3.2+)

Designed for Saltwater Sources. See the U24-001 for Fresh Water Sources

• Measure and Log Water Level and Temperature Readings at a Depth up to 13, 30 or 100ft
• A non-Vent Tube Design Allows for Easy Deployment
• (8) User-Defined Logging Intervals Over an 1 Second to 18 Hour Sampling Rate
• Stainless Steel Housing with Lightning Protection Shields Electronics
• Factory-Replaceable 5-Year 2/3 AA Lithium Battery

Includes (1) U20 Water Level Data Loggers, Shuttle Data Transporter (U-DTW-1) and HOBOware Pro Software (BHW-PRO-DLD)

• Measure and Log Water Level, Barometric Pressure and Temperature Readings at a Depth up to 13, 30 or 100ft
• A non-Vent Tube Design Allows for Easy Deployment
• (8) User-Defined Logging Intervals Over an 1 Second to 18 Hour Sampling Rate
• Stainless Steel Housing with Lightning Protection Shields Electronics
• Factory-Replaceable 5-Year 2/3 AA Lithium Battery

Includes (2) U20 Water Level Data Loggers, Shuttle Data Transporter (U-DTW-1), Carrying Case (U20-CASE) and HOBOware Pro Software (BHW-PRO-DLD)

• -20°C to 70°C Temperature Measurement Range with ±0.2°C Accuracy
• 5 Year Non-Replaceable Lithium Battery
• Waterproof Housing for Use in Outdoor or Condensing Environments Up to 300 Meters (1000 ft)
• Drop-Proof to 1.5 Meters with Optional Protective Boot
• Stores up to 42,0000 Recorded Temperature Readings

Requires Communication Device BASE-U-4 Optic USB Base Station or U-DTW-1 Waterproof Shuttle (U-DTW-1 Requires HOBOware Pro BHW-PRO-DLD)

• -40°C to 125°C Temperature Measurement Range and ±0.22°C Accuracy
• Stores up to 43,000 Measured Samples/Readings
• 3 Year Non-Replaceable Battery Life
• Rugged Food-Grade 316L Stainless Steel Housing
• 2200PSI (1500 Meters/4900ft) Max. Pressure Rating

Requires Type A to Mini B Standard USB Cable (CABLE-USB), HOBOware (Free Download Version) or HOBOware Pro (Paid Download Version) Software.

• -40°C to 50°C Water Measurement Range with ±0.2°C Accuracy
• 6 Year Non-Replaceable 3.6 Volt Lithium Battery
• Stores up to 42,000 Recorded Temperature Readings
• Waterproof to 120 Meters (400 ft)

Requires Communication Device BASE-U-4 Optic USB Base Station or U-DTW-1 Waterproof Shuttle (U-DTW-1 Requires HOBOware PRO BHW-PRO-DLD)