About Onset


Onset is a world leader in data loggers. Our Mission: To provide data logging products that help our customers assess the environment to make the world better. 

Our award winning HOBO® data logger and weather station products are used around the world in a broad range of monitoring applications, from verifying the performance of green buildings and renewable energy systems to agricultural and coastal research. 

Based on Cape Cod, Massachusetts, Onset has sold more than 2.5 million data loggers since the company’s founding in 1981. Onset has designed and manufactured its HOBO data loggers on-site at its headquarters on Cape Cod, Massachusetts for more than 30 years. 


Company Timeline

  • 2015

    Introduced the HOBO RX3000 Remote Monitoring Station

  • 2014

    Introduced the MX1101 Temp/RH logger for mobile devices

  • 2013

    Introduced the UX100 Series Temperature/Relative Humidity data loggers

  • 2012

    Introduced the HOBO U26 Dissolved Oxygen data logger

  • 2012

     Introduced the UX90 Series Time-of-Use data loggers

  • 2010

    Introduced the HOBO U24 Conductivity/Salinity data loggers

  • 2009

    Developed the HOBOnode Series wireless sensors

  • 2008

    Introduced the HOBO U30 web-based monitoring platform

  • 2006

    Sold 1 millionth data logger

  • 2005

    Developed HOBOware cross platform data logging software

  • 2004

    Developed 15-channel modular energy monitoring system

  • 2001

    Established market for mid-range, research-grade weather stations

  • 1998

    Developed first optic data shuttle

  • 1997

    Purchased 40,000 sq. ft facility

  • 1991

    Developed first under - $100 temperature logger– The original HOBO

  • 1981

    Ellen and Lon Hocker developed first low-power data logger in their Falmouth, Massachusetts barn