Onset HOBO water level loggers


Conventional sea level gauges are very expensive with cost running into several thousands of euros. These are low-cost but industry specifc low-cost sensors that have been shown in the peer-reviewed literature to be effective instruments for measuring coastal sea levels, storm surges

Monitored Parameters:

  • Water levels
  • Hazards:

  • Coastal flooding
  • Sea level rise
  • Storm surge
  • ✓ Relevant to WP3 models ✓ Relevant to the EWSS


    Minimum Quantity : 3


    Sensor Properties
    Accuracy (error of the measurements) Unit of measurement Data Refresh Time (mins) Wi-Fi Connection 4G Connection External Power Supply Documentation
    1.5 cm (for a water level sensors of an operation range between (0-30m) cm 0 False False False See available docs for Onset HOBO water level loggers
    Reference Partners Project Name Project Year Reference Paper Minimum Purchase Spatial Density
    ATU Sensing Storm Surge 2021 Reference paper 3 1
    Purchase operations complexity Assembly/Calibration Operations Complexity Deployment operation Complexity Deployment Cost Data Analysis Operations Complexity
    Easy Neutral Medium Easy
    Citizen Science Activities Complexity Assembly Public Involvement Deployment Public Involvement Data analysis Public Involvement Target Users
    Easy High-The sensor comes preassembled. Only that a proper sensor housing has to be made to secure the sensor and citizens can be engaged in this part. The sensor enclosure (PVC pipe stilling well) will be provided by ATU Sligo. The sensor will be secured within this stilling well by using zip ties. Citizens can be easily engaged for this part. Limited- Deployment will take place in coastal areas near tide gauges.The deployment site will be predetermined and the sensor along with the housing will be mounted with clamps onto suitable rigid structures. Ideally personal exposure to water is nill, but in unseen cases a person may have to tread into shallow waters to check if the sensor is stable (not moving) and that it is always submerged. Though only shallow waters are involved but could be a risk for the citizens. So this activity is to be limited to the researchers only. High-The water sensors have bluetooth capabilities. So the data can be easily transferred into ones phone using bluetooth within a 30 metres range and easily visualised in a dedicated mobile app. This data can also be downloaded on a laptop. Citizens can easily interpret the data. Further processing to get scientific information will be undertaken by researchers. local groups; local authorities


    The program to monitor the data is from Hobo and is free. It's called the HOBOConnect Monitoring App (you can download it in https://www.onsetcomp.com/products/software/hoboconnect) and it's available for Android, iPhone, and Windows computers. The data is transmitted to the program via Bluetooth. Once the data is on the computer, it must be sent to the SCORE SIP platform.

    Ireland: Tempcon / www.tempcon.co.uk/data-loggers/onset-hobo-data-loggers
    Spain: Darrera / www.darrera.com/wp/es/producto/u20l-hobo-u20l-water-level/

    Additional pictures