Lake Sentinel Buoy

Overview

Lake Sentinel is a lightweight solar-powered monitoring buoy that reads six water variables every 30 minutes and streams them straight into your lake's account. It weighs about eight pounds, drops in the water without a crane or a technician, and is typically deployed in under an hour by whoever is available.

The sensors work by fluorescence. Chlorophyll-a indicates algae generally; phycocyanin is specific to cyanobacteria, the blue-green algae that produce toxins. Reading both means you can tell a harmless green algae bloom from the one that closes a beach — and you can see it building while the water still looks fine.

Lake Sentinel is leased, not sold — the only item in the Toolbox on that basis. Lease periods are 1, 3, 6, and 12 months.

What problem does this solve for our lake?

A cyanobacteria bloom is a fast event with a slow warning. Cell counts double in days, and by the time the water turns, the decision has already been made for you: close the beach, cancel the regatta, explain it to the membership. What continuous bloom monitoring changes: • You see it building. Phycocyanin rises before visible surface scum. That lead time is the difference between a planned response and a reaction. • You can distinguish the blooms that matter. Chlorophyll-a alone tells you there is algae. Phycocyanin tells you it is the kind that produces toxins. Most lakes have green algae all summer and no reason to worry about it. • You get an evidentiary record. A documented history of clean readings is worth a great deal to a shoreline community — and a documented bloom, timed and measured, is what supports a grant application or a treatment decision. • You stop relying on someone noticing. Blooms concentrate downwind and often start in a corner nobody visits. A buoy does not take weekends off. Where this fits against the rest of the Toolbox: a lab panel tells you what is in the water on one day with defensible precision. Lake Sentinel tells you what is happening every half hour with less precision. Both are true, and the useful pattern is the buoy for detection and a lab panel for confirmation once something shows up.

What's included?

• Lake Sentinel monitoring buoy — solar powered, cellular connected, self-cleaning sensors
• Six water variables measured continuously, including chlorophyll-a, phycocyanin, turbidity, and water temperature [FILL - confirm the full six against current hardware]
• Four additional weather parameters pulled from the nearest station and stored alongside the water data
• Readings every 30 minutes, 24 hours a day
• Mooring and anchoring hardware
• Deployment guidance — no technician required; typical install is under an hour
• Data flows up to the Lake Pulse cloud and back down into your lake's account, where it can be charted in the Analytics Hub, used to trigger alerts, and shared with your board and members
• Leased for a fixed period — 1, 3, 6, or 12 months. Lake Sentinel is the only leased item in the Toolbox; all other hardware is sold outright.

What's not included

• Laboratory chemistry. Fluorescence sensors indicate pigment concentration, not toxin concentration.
• A microcystin or cyanotoxin number. A high phycocyanin reading is a reason to sample, not a measured toxin level.
• Regulatory or compliance monitoring, or a basis for an official beach closure
• Deployment and recovery. You place, moor, and retrieve the buoy.
• Winter deployment. Recover before ice-in.
• Depth profiling. This is a surface-water instrument.
• Treatment, remediation, or applicator services

Requirements

• A deployment site where blooms actually concentrate — typically a downwind bay or near an inflow, not the middle of the lake
• Someone to set the mooring and recover the buoy seasonally
• Cellular coverage at the deployment site
• Permission to moor, where your state or lake district requires it
• A lease period chosen before ordering — 1, 3, 6, or 12 months. The longer periods cost substantially less per month.
• A Plus, Lake Admin, or PRO subscription. Syncing a real-time device to a Lake Pulse account requires one of these tiers.
• Contact the Lake Pulse Boathouse if you have questions.