Onset HOBO Data Loggers

Onset HOBO Data Loggers

Onset Computer Corporation, based in Bourne, Massachusetts, has been manufacturing data logging instruments under the HOBO brand since 1981. Onset specializes in compact, battery-operated, and weatherproof data loggers designed for long-term unattended field deployment. HOBO loggers capture and store measurements at user-defined intervals, enabling researchers, engineers, and facility managers to analyze environmental and process conditions over extended periods.

The HOBO product family covers a broad range of measurement parameters including water level and temperature, specific conductance, relative humidity, CO2, light intensity, and dissolved oxygen. Many models interface with a PC via USB or wireless Bluetooth using Onset's HOBOware software, while others support the HOBOlink cloud-based platform for remote monitoring.

Key Product Lines

• Water Level Loggers — U20-series pressure-based loggers for groundwater, surface water, and stormwater monitoring in wells and open channels
• Conductivity Loggers — U24-series instruments measuring specific conductance for salinity and water quality assessment in fresh and saline water
• Temperature and Humidity Loggers — UX100-series loggers for HVAC, cold chain, building science, and indoor environmental quality monitoring
• Anti-Fouling Accessories — replacement guards and wipers to extend submersible logger deployment life in biofouling-prone environments

Industries Served

Onset HOBO data loggers are used in environmental consulting, hydrology and watershed research, municipal water utilities, university field studies, agricultural water management, building energy commissioning, HVAC performance verification, and industrial process monitoring. Their rugged, self-contained designs make them well suited for remote or difficult-to-access measurement sites.