Sentinel:
Solar Telemetry Buoy for Water Quality at Depth

The Sentinel (ART-SEN1) is a lightweight, solar-powered surface buoy that powers a TrackerSonde or a single sensor and uploads its readings to the AquaRealTime dashboard. It is built on the same platform as the AlgaeTracker, without the built-in surface sensors, making it the lower-cost choice when you need data at depth rather than at the surface.

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Sentinel telemetry buoys deployed with a single sensor and with a TrackerSonde at depth

Sentinel or AlgaeTracker?

Choose the Sentinel when you:

Need data at depth, not at the surface
Want a sonde or single sensor
Want the lower-cost telemetry buoy

Choose the AlgaeTracker when you:

Want surface chlorophyll, phycocyanin, turbidity and light built in
Want the simplest install, with nothing to attach
Can also add a TrackerSonde for data at depth

Sentinel ART-SEN1 solar water quality telemetry buoy

Key features

One sonde or sensor: Carry a TrackerSonde with up to six probes, or one single sensor.
Data at depth: Sensors sit from 40 cm to 30 m deep, or 200 m with the deep-water version.
Quick install: One person can deploy the Sentinel in 30–60 minutes with plug-and-play connections.
Solar powered: The solar panel and battery keep it running for up to two weeks without sun.
Managed cellular: 4G LTE Cat-M1 with automatic carrier switching, fully managed by AquaRealTime.
GPS location: The buoy reports its position and sends an alert if it drifts.
Dashboard and data: Readings upload to the dashboard for alerts, charts and CSV export, or through the REST API.
Proven platform: The same rugged buoy as the AlgaeTracker, without the built-in surface sensors.