Wireless Data Transmission
Choose cellular, satellite, or LoRaWAN based on your deployment. US cellular units can auto-switch between AT&T, Verizon, and T-Mobile, with international coverage in 150+ countries.
ToltHawk Level Sensor · Third Generation
Water level data.
Without the guesswork.
Radar-based. Wireless. Self-contained.
Monitor floods, rivers, streams, lakes, sewer lines, and lift pump stations with a low-cost sensor designed for real-world field conditions. Get dependable measurements without complicated installation or routine maintenance.
✓ 5–10 year service life✓ No calibration after installation✓ Multiple connectivity options
Third-generation sensor · Field-ready design
Built to measure.
Designed to stay out there.
A self-contained monitoring system built to deliver water-level data with less routine maintenance and straightforward installation.
5–10 yearsDesigned service life
15 cm–20 mMeasurement range
15 minutesStandard update interval
3 optionsCellular, satellite, or LoRaWAN
Engineered for the field
Less time maintaining equipment.
More time using the data.
ToltHawk combines radar-based level measurement and wireless communication in one self-contained unit. Monitor changing water levels without having to visit each site to collect readings manually.
Solar-charged battery power supports extended operation. Configurable communications, alerts, and API access help get useful information to the people and systems that need it.
Straightforward installationTypically mounted over bridges or on cantilevers, without post-installation calibration.
Built for remote monitoringChoose cellular, satellite, or LoRaWAN to suit the deployment location.
Capabilities
Engineered for the field.
The essential tools for collecting, sharing, and acting on water-level data from sites that are difficult to monitor manually.
Maintenance-Free Operation
Designed for 5–10 years of field operation without routine maintenance. Solar-charged battery power supports operation for many months without sunlight.
Easy Installation
Self-contained units typically mount over bridges or on cantilevers. No wiring or calibration is required after installation.
Configurable Alerts
Set threshold levels for individual locations and receive phone, text, and email notifications when readings reach the levels you configure.
JSON API
Integrate sensor readings into your own software, websites, and dashboards using the available REST API.
External Data Integration
Bring together sensor information with NOAA weather and precipitation data, in-basin USGS gauges, and LiDAR contour data.
Technical specifications
The details that matter.
A practical overview of measurement performance, power, service life, and connectivity.
Measurement range15 cm–20 m (0.5–65 ft)
Radar beam angle3°–7°
Standard update frequency15 minutes
Configurable update frequency15 minutes–3 hours
Sampling frequencyDown to 5 minutes*
Power supplyBattery with solar charging
Service life5–10 years maintenance-free
ConnectivityCellular, satellite, or LoRaWAN
CalibrationSelf-calibrating; no post-installation calibration required
OriginMade in the USA; some components sourced from China and Switzerland
Connectivity
Coverage for your deployment.
Select the communication method that matches your site's coverage, infrastructure, and monitoring requirements.
Connected sites
Cellular
For sites with cellular service. US units can auto-switch across AT&T, Verizon, and T-Mobile, with international coverage available in 150+ countries.
For sites with cellular coverage →
Remote locations
Satellite
For remote deployments without cellular coverage. Satellite-enabled configurations can send data from locations beyond conventional mobile networks.
For remote monitoring locations →
Local networks
LoRaWAN
For sites without cellular coverage that are within range of a LoRaWAN gateway. A suitable gateway and network setup are required.
For gateway-connected sites →
Optional add-ons
Extend your monitoring setup.
Add capabilities to suit the conditions, equipment, and response requirements at your site.
Camera Module
Capture pictures and videos of the target area. Cellular configurations support live media transmission; satellite configurations record onsite for later retrieval.
External Sensor Connectors
Connect compatible additional sensors for measurements such as temperature, precipitation, conductivity, turbidity, and more.
Submersible Transducers
Support below-grade or submerged measurement applications alongside the standard radar unit.
Triggered Output Devices
Trigger compatible field devices, including flashing road signals and sirens, when configured alert thresholds are crossed.
Questions
Answers from the field.
Have a question about installation, measurement intervals, data access, or selecting the right configuration?
Talk to ToltHawk →No post-installation calibration is required. The sensor is self-calibrating and is designed to begin transmitting automatically when installed in the correct position.
Most organizations install the sensors themselves. They are self-contained and designed for straightforward installation, typically over a bridge or on a cantilever. Consult the user manual and check local permit requirements before installing in public rights-of-way.
The standard update frequency is every 15 minutes, and the interval can be configured from 15 minutes to 3 hours. Sampling can be as frequent as every 5 minutes, although shorter intervals can increase battery consumption.
The specified measurement range is 15 centimetres to 20 metres (approximately 0.5 to 65 feet). Confirm suitability for your site and mounting arrangement before deployment.
Yes. A JSON REST API is available for integrating sensor data into your own software, websites, and dashboards. Contact ToltHawk for API documentation and access details.
Data-sharing requirements can vary by deployment. Contact ToltHawk to confirm the available public-data, sharing, and integration options for your configuration.
You can configure thresholds for individual monitoring locations and receive phone, text, and email notifications when a configured threshold is reached. Multiple alert levels can be set for each location.
Cellular coverage is available in more than 150 countries, but coverage does not necessarily determine shipping availability. Contact ToltHawk with your destination and deployment requirements to confirm shipping and support options.
Plan your deployment
Specify the sensor your deployment deserves.
Tell us about your site, measurement range, and connectivity needs. We can help you discuss the right ToltHawk configuration for your monitoring requirements.