Onset Computer Corp.

• Measures Conductivity, Salinity, Temperature, Depth or Dissolved Oxygen
• Fully Submersible and Retrieve for Data Offload Using HOBOconnect App
• Wireless Bluetooth Communications for Setup, Configuration and Data Offload
• Guided Calibration for Accurate Data and Water Detect Feature 
• User-Replaceable Lithium Batteries

Requires W-CT Conductivity and Temperature, W-CTD Conductivity, Temperature and Depth or W-DO Dissolved Oxygen Sensor. 

• Measures Conductivity, Salinity, Temperature and Barometric Pressure (Depth)
• Data Logger Remains Above the Water and Cables and Sensors Extend into Fresh or Salt Water
• Wireless Bluetooth Communications for Setup, Configuration and Data Offload Using HOBOconnect App
• Guided Calibration for Accurate Data and Water Detect Feature 
• User-Replaceable Lithium Batteries
• Interchangeable Sensors for Dissolved Oxygen (W-DO) and Conductivity (W-CT)

Requires W-CT Conductivity and Temperature, W-CTD Conductivity, Temperature and Depth or W-DO Dissolved Oxygen Sensor.

• Records Absolute or Barometric Pressure (Water Level) and Temperature in Wet or Water Environments
• 0 to 13 ft, 0 to 30 ft , 0 to 100 ft and 0 to 250ft Water Level Ranges with Stainless Steel or Titanium Housing Options
• Bluetooth (BLE) Communications for Setup and Data Download
• User Replaceable Alkaline Batteries with 1 Year Life (1 Minute Sampling Rate)
• Stores up to 30,000 Measured Readings with Date/Time Stamp

HOBOconnect App Software Available for Download

• Non-contact Sensor Minimizes Drift-Related Measurement Errors
• 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
• 0 to 15,000 µS/cm (Conductivity Extended Range) and 0°C to 40°C (Temperature) Measurement Ranges
• 3 Year Battery Life with Factory Replaceable Battery
• Stores at Least 14,400 Sets of Measured Readings
• Requires HOBOware Pro Software (Version 3.2+) and BASE-U-4 Optical Base Station

Designed for Fresh Water Sources. See the Onset U24-002-C for Saltwater Sources

• Measure and Log Water Level (Pressure) and Temperature Readings
• -20°C to 50°C Temperature Measurement Range with ±0.44°C Accuracy
• Factory-Replaceable 2/3 AA 3.6 Volt Lithium Battery with 5 Year Life @ 1 Minute Sampling Rate
• No-Vent-Tube Design for Easy Reliable Deployment and Durable Ceramic Pressure Sensor
• Available in 0 to 13 ft, 0 to 30ft, 0 to 100ft and 0 to 250ft Water Depth Ranges and Stainless Steel or Titanium Housing

Requires HOBOware Pro Software (Version 3.2+) and an Optic USB Base Station (BASE-U-4) or Shuttle Data Transporter (U-DTW-1)

• Long-Term pH and Temperature Measurements in Estuaries, Lakes, Streams, Rivers and Oceans (Salt and Freshwater Environments)
• Wireless Transmission of Recorded Readings to Phone or Tablet Using Bluetooth Smart LE Communications
• 2.0 to 12.0 pH and 2C to 50C Measurement Ranges and +/-0.10pH and +/-0.2C Accuracy
• User-Replaceable Lithium Battery with 1 Year Typical Life (1 Minute Sampling Rate and Bluetooth Always On)
• Stores up to 43,300 Measured Readings with Date/Time Stamp if Bluetooth Communications Not Available

Includes pH Electrode and Lithium Battery. HOBOconnect App Available on the Apple Store (iOS) and Google Play (Android)

• 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)

• 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